荧光碳点的制备、发光性质及其机理
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摘要
碳量子点作为一种新型的荧光纳米材料,由于具有众多优点而备受关注。良好的水溶性、高稳定性、低毒性、易于功能化,以及低成本和简单的合成路线,使它们成为传统半导体量子点的潜在替代品。然而,长波长和多色荧光碳点的制备存在一定的困难,限制了其在生物成像和光电器件等领域的应用。碳点具有颜色易调节的性质,磷光和上转换性能也逐渐被关注,而对碳点荧光现象的机理研究依然是一项具有挑战性的工作。本文从碳点的制备方法出发,综述了近年来关于碳点荧光性质和机理的研究进展,并介绍了其相关领域的应用工作。
Carbon dots( CDs) have attracted lots of attention due to their unique advantages in new fluorescent nanomaterials fields. Carbon dots have good water solubility,high stability,low toxicity,and easy to be functionalized with low cost and simple synthesis route,which make them excellent substitutes for traditional semiconductor quantum dots. However,there are some barriers in the preparation of long wavelength and multicolor emitting carbon dots during the research,which limit their further application in biological imaging and photoelectric devices. The color-tunable property of carbon dots is special,and the phosphorescence and up-conversion photoluminescence properties have been paid more attention recently. Nevertheless,it is still a challenging work in explaining the fluorescence mechanism of carbon dots according to their different fluorescent natures. Based on various preparation methods of carbon dots,the fluorescence properties and mechanisms of carbon dots are mainly reviewed in this article,and the related applications are introduced.
Carbon dots( CDs) have attracted lots of attention due to their unique advantages in new fluorescent nanomaterials fields. Carbon dots have good water solubility,high stability,low toxicity,and easy to be functionalized with low cost and simple synthesis route,which make them excellent substitutes for traditional semiconductor quantum dots. However,there are some barriers in the preparation of long wavelength and multicolor emitting carbon dots during the research,which limit their further application in biological imaging and photoelectric devices. The color-tunable property of carbon dots is special,and the phosphorescence and up-conversion photoluminescence properties have been paid more attention recently. Nevertheless,it is still a challenging work in explaining the fluorescence mechanism of carbon dots according to their different fluorescent natures. Based on various preparation methods of carbon dots,the fluorescence properties and mechanisms of carbon dots are mainly reviewed in this article,and the related applications are introduced.
引文
[1]XU X,RAY R,GU Y,et al. Electrophoretic analysis and purification of fluorescent single-walled carbon nanotube fragments[J]. Journal of the American Chemical Society,2004,126:12736-12737.
[2]BOURLINOS A B,STASSINOPOULOS A,ANGLOS D,et al. Photoluminescent carbogenic dots[J]. Chemistry of Materials,2008,20:4539-4541.
[3]BOURLINOS A B,STASSINOPOULOS A,ANGLOS D,et al. Surface functionalized carbogenic quantum dots[J]. Small,2008,4:455-458.
[4]CAO L,WANG X,MEZIANI M J,et al. Carbon dots for multiphoton bioimaging[J]. Journal of the American Chemical Society,2007,129:11318-11319.
[5]LU J,YANG J X,WANG J,et al. One-pot synthesis of fluorescent carbon nanoribbons,nanoparticles,and graphene by the exfoliation of graphite in ionic liquids[J]. ACS Nano,2009,3:2367-2375.
[6]FU M,EHRAT F,WANG Y,et al. Carbon dots:a unique fluorescent cocktail of polycyclic aromatic hydrocarbons[J]. Nano Letters,2015,15:6030-6035.
[7]SCHMIDT R,KRASSELT C,GHLER C,et al. The fluorescence intermittency for quantum dots is not power-law distributed:a luminescence intensity resolved approach[J]. ACS Nano,2014,8:3506-3521.
[8]CHOI Y,KANG B,LEE J,et al. Integrative approach toward uncovering the origin of photoluminescence in dual heteroatom-doped carbon nanodots[J]. Chemistry of Materials,2016,28:6840-6847.
[9]SAHU S,BEHERA B,MAITI T K,et al. Simple one-step synthesis of highly luminescent carbon dots from orange juice:application as excellent bio-imaging agents[J]. Chemical Communications,2012,48:8835-8837.
[10]DUTTA CHOUDHURY S,CHETHODIL J M,GHARAT P M,et al. p H-elicited luminescence functionalities of carbon dots:mechanistic insights[J]. The Journal of Physical Chemistry Letters,2017,8:1389-1395.
[11]XIE R,WANG Z,ZHOU W,et al. Graphene quantum dots as smart probes for biosensing[J]. Analytical Methods,2016,8:4001-4016.
[12]YUAN F,WANG Z,LI X,et al. Bright multicolor bandgap fluorescent carbon quantum dots for electroluminescent light-emitting diodes[J]. Advanced Materials,2017,29:1604436.
[13]ZHU B,SUN S,WANG Y,et al. Preparation of carbon nanodots from single chain polymeric nanoparticles and theoretical investigation of the photoluminescence mechanism[J]. Journal of Materials Chemistry C,2013,1:580-586.
[14]PENG J,GAO W,GUPTA B K,et al. Graphene quantum dots derived from carbon fibers[J]. Nano Letters,2012,12:844-849.
[15]HU S L,NIU K Y,SUN J,et al. One-step synthesis of fluorescent carbon nanoparticles by laser irradiation[J]. Journal of Materials Chemistry,2009,19:484-488.
[16]STRAUSS V,MARGRAF J T,DOLLE C,et al. Carbon nanodots:toward a comprehensive understanding of their photoluminescence[J]. Journal of the American Chemical Society,2014,136:17308-17316.
[17]SUN Y P,ZHOU B,LIN Y,et al. Quantum-sized carbon dots for bright and colorful photoluminescence[J]. Journal of the American Chemical Society,2006,128:7756-7757.
[18]LIN L,ZHANG S. Creating high yield water soluble luminescent graphene quantum dots via exfoliating and disintegrating carbon nanotubes and graphite flakes[J]. Chemical Communications,2012,48:10177-10179.
[19]ZHENG L,CHI Y,DONG Y,et al. Electrochemiluminescence of water-soluble carbon nanocrystals released electrochemically from graphite[J].Journal of the American Chemical Society,2009,131:4564-4565.
[20]MING H,MA Z,LIU Y,et al. Large scale electrochemical synthesis of high quality carbon nanodots and their photocatalytic property[J]. Dalton Transactions,2012,41:9526-9531.
[21]LI H,HE X,KANG Z,et al. Water-soluble fluorescent carbon quantum dots and photocatalyst design[J]. Angewandte Chemie International Edition,2010,49:4430-4434.
[22]RUSSO P,LIANG R,JABARI E,et al. Single-step synthesis of graphene quantum dots by femtosecond laser ablation of graphene oxide dispersions[J]. Nanoscale,2016,8:8863-8877.
[23]RUSSO P,HU A,COMPAGNINI G,et al. Femtosecond laser ablation of highly oriented pyrolytic graphite:a green route for large-scale production of porous graphene and graphene quantum dots[J]. Nanoscale,2014,6:2381-2389.
[24]ZHOU J,BOOKER C,LI R,et al. An electrochemical avenue to blue luminescent nanocrystals from multiwalled carbon nanotubes(MWCNTs)[J]. Journal of the American Chemical Society,2007,129:744-745.
[25]LIU H,YE T,MAO C. Fluorescent carbon nanoparticles derived from candle soot[J]. Angewandte Chemie International Edition,2007,119:6593-6595.
[26]MENG X,CHANG Q,XUE C,et al. Full-colour carbon dots:from energy-efficient synthesis to concentration-dependent photoluminescence properties[J]. Chemical Communications,2017,53:3074-3077.
[27]BAO L,LIU C,ZHANG Z L,et al. Photoluminescence-tunable carbon nanodots:surface-state energy-gap tuning[J]. Advanced Materials,2015,27:1663-1667.
[28]WANG X,QU K,XU B,et al. Microwave assisted one-step green synthesis of cell-permeable multicolor photoluminescent carbon dots without surface passivation reagents[J]. Journal of Materials Chemistry,2011,21:2445-2450.
[29]XU M,HE G,LI Z,et al. A green heterogeneous synthesis of N-doped carbon dots and their photoluminescence applications in solid and aqueous states[J]. Nanoscale,2014,6:10307-10315.
[30]QU S,WANG X,LU Q,et al. A biocompatible fluorescent ink based on water-soluble luminescent carbon nanodots[J]. Angewandte Chemie International Edition,2012,51:12215-12218.
[31]QU S,ZHOU D,LI D,et al. Toward efficient orange emissive carbon nanodots through conjugated sp2-domain controlling and surface charges engineering[J]. Advanced Materials,2016,28:3516-3521.
[32]TIAN Z,ZHANG X,LI D,et al. Full-color inorganic carbon dot phosphors for white-light-emitting diodes[J]. Advanced Optical Materials,2017,5:1700416.
[33]ZHU S,MENG Q,WANG L,et al. Highly photoluminescent carbon dots for multicolor patterning,sensors,and bioimaging[J]. Angewandte Chemie International Edition,2013,52:3953-3957.
[34]BHUSHAN B,KUMAR S U,GOPINATH P. Multifunctional carbon dots as efficient fluorescent nanotags for tracking cells through successive generations[J]. Journal of Materials Chemistry B,2016,4:4862-4871.
[35]WANG J,GAO M,HO G W. Bidentate-complex-derived Ti O2/carbon dot photocatalysts:in situ synthesis,versatile heterostructures,and enhanced H2evolution[J]. Journal of Materials Chemistry A,2014,2:5703-5709.
[36]QU K,WANG J,REN J,et al. Carbon dots prepared by hydrothermal treatment of dopamine as an effective fluorescent sensing platform for the label-free detection of iron(iii)ions and dopamine[J]. Chemistry-A European Journal,2013,19:7243-7249.
[37]YANG Z,XU M,LIU Y,et al. Nitrogen-doped,carbon-rich,highly photoluminescent carbon dots from ammonium citrate[J]. Nanoscale,2014,6:1890-1895.
[38]MA Y,CHEN Y,LIU J,et al. Ratiometric fluorescent detection of chromium(vi)in real samples based on dual emissive carbon dots[J]. Talanta,2018,185:249-257.
[39]LI C,LIU W,SUN X,et al. Excitation dependent emission combined with different quenching manners supports carbon dots to achieve multi-mode sensing[J]. Sensors and Actuators B:Chemical,2018,263:1-9.
[40]DING H,WEI J S,XIONG H M. Nitrogen and sulfur co-doped carbon dots with strong blue luminescence[J]. Nanoscale,2014,6:13817-13823.
[41]SONG Y,ZHU S,ZHANG S,et al. Investigation from chemical structure to photoluminescent mechanism:a type of carbon dots from the pyrolysis of citric acid and an amine[J]. Journal of Materials Chemistry C,2015,3:5976-5984.
[42]ZHU S,ZHAO X,SONG Y,et al. Beyond bottom-up carbon nanodots:citric-acid derived organic molecules[J]. Nano Today,2016,11:128-132.
[43]JIANG D,ZHAO H,YANG Y,et al. Investigation of luminescent mechanism:N-rich carbon dots as luminescence centers in fluorescent hydroxyapatite prepared using a typical hydrothermal process[J]. Journal of Materials Chemistry B,2017,5:3749-3757.
[44]WANG J,WANG C F,CHEN S. Amphiphilic egg-derived carbon dots:rapid plasma fabrication,pyrolysis process,and multicolor printing patterns[J]. Angewandte Chemie International Edition,2012,51:9297-9301.
[45]LAI C W,HSIAO Y H,PENG Y K,et al. Facile synthesis of highly emissive carbon dots from pyrolysis of glycerol; gram scale production of carbon dots/m SiO2for cell imaging and drug release[J]. Journal of Materials Chemistry,2012,22:14403-14409.
[46]FANG Y,GUO S,LI D,et al. Easy synthesis and imaging applications of cross-linked green fluorescent hollow carbon nanoparticles[J]. ACS Nano,2011,6:400-409.
[47]CUI Y,BU X,ZOU H,et al. A dual solvent evaporation route for preserving carbon nanoparticle fluorescence in silica gel and producing white light-emitting diodes[J]. Materials Chemistry Frontiers,2017,1:387-393.
[48]PHAM-TRUONG T N,PETENZI T,RANJAN C,et al. Microwave assisted synthesis of carbon dots in ionic liquid as metal free catalyst for highly selective production of hydrogen peroxide[J]. Carbon,2018,130:544-552.
[49]HUANG T,WU T,ZHU Z,et al. Self-assembly facilitated and visible light-driven generation of carbon dots[J]. Chemical Communications,2018,54:5960-5963.
[50]YANG S,ZENG H,ZHAO H,et al. Luminescent hollow carbon shells and fullerene-like carbon spheres produced by laser ablation with toluene[J]. Journal of Materials Chemistry,2011,21:4432-4436.
[51]WANG Z,YUAN F,LI X,et al. 53%efficient red emissive carbon quantum dots for high color rendering and stable warm white-light-emitting diodes[J]. Advanced Materials,2017,29:1702910.
[52]MIAO H,WANG Y,YANG X. Carbon dots derived from tobacco for visually distinguishing and detecting three kinds of tetracyclines[J].Nanoscale,2018,10:8139-8145.
[53]ZHENG M,WANG C,WANG Y,et al. Green synthesis of carbon dots functionalized silver nanoparticles for the colorimetric detection of phoxim[J]. Talanta,2018,185:309-315.
[54]WU S,LI W,ZHOU W,et al. Large-scale one-step synthesis of carbon dots from yeast extract powder and construction of carbon dots/PVA fluorescent shape memory material[J]. Advanced Optical Materials,2018,6:1701150.
[55]LIU L,GONG H,LI D,et al. Synthesis of carbon dots from pear juice for fluorescence detection of Cu2+ion in water[J]. Journal of Nanoscience and Nanotechnology,2018,18:5327-5332.
[56]DING H,JI Y,WEI J S,et al. Facile synthesis of red-emitting carbon dots from pulp-free lemon juice for bioimaging[J]. Journal of Materials Chemistry B,2017,5:5272-5277.
[57]ATCHUDAN R,EDISON T N J I,LEE Y R. Nitrogen-doped carbon dots originating from unripe peach for fluorescent bioimaging and electrocatalytic oxygen reduction reaction[J]. Journal of Colloid and Interface Science,2016,482:8-18.
[58]HUANG H,LV J J,ZHOU D L,et al. One-pot green synthesis of nitrogen-doped carbon nanoparticles as fluorescent probes for mercury ions[J].RSC Advances,2013,3:21691-21696.
[59]LIU S,TIAN J,WANG L,et al. Hydrothermal treatment of grass:a low-cost,green route to nitrogen-doped,carbon-rich,photoluminescent polymer nanodots as an effective fluorescent sensing platform for label-free detection of Cu(II)ions[J]. Advanced Materials,2012,24:2037-2041.
[60]JEONG C J,ROY A K,KIM S H,et al. Fluorescent carbon nanoparticles derived from natural materials of mango fruit for bio-imaging probes[J].Nanoscale,2014,6:15196-15202.
[61]ZHOU J,SHENG Z,HAN H,et al. Facile synthesis of fluorescent carbon dots using watermelon peel as a carbon source[J]. Materials Letters,2012,66:222-224.
[62]ALAM A M,PARK B Y,GHOURI Z K,et al. Synthesis of carbon quantum dots from cabbage with down-and up-conversion photoluminescence properties:excellent imaging agent for biomedical applications[J]. Green Chemistry,2015,17:3791-3797.
[63]WANG Q,LIU X,ZHANG L,et al. Microwave-assisted synthesis of carbon nanodots through an eggshell membrane and their fluorescent application[J]. Analyst,2012,137:5392-5397.
[64]WANG J,SAHU S,SONKAR S K,et al. Versatility with carbon dots-from overcooked BBQ to brightly fluorescent agents and photocatalysts[J].RSC Advances,2013,3:15604-15607.
[65]YU J,SONG N,ZHANG Y K,et al. Green preparation of carbon dots by jinhua bergamot for sensitive and selective fluorescent detection of Hg2+and Fe3+[J]. Sensors and Actuators B:Chemical,2015,214:29-35.
[66]FENG J,WANG W J,HAI X,et al. Green preparation of nitrogen-doped carbon dots derived from silkworm chrysalis for cell imaging[J]. Journal of Materials Chemistry B,2016,4:387-393.
[67]MEHTA V N,JHA S,BASU H,et al. One-step hydrothermal approach to fabricate carbon dots from apple juice for imaging of mycobacterium and fungal cells[J]. Sensors and Actuators B:Chemical,2015,213:434-443.
[68]LIN P Y,HSIEH C W,KUNG M L,et al. Eco-friendly synthesis of shrimp egg-derived carbon dots for fluorescent bioimaging[J]. Journal of Biotechnology,2014,189:114-119.
[69]SU A,ZHONG Q,CHEN Y. et al. Preparation of carbon quantum dots from cigarette filters and its application for fluorescence detection of Sudan I[J]. Analytica Chimica Acta,2018,1023:115-120.
[70]JEONG Y,MOON K,JEONG S,et al. Converting waste papers to fluorescent carbon dots in the recycling process without loss of ionic liquids and bioimaging applications[J]. ACS Sustainable Chemistry&Engineering,2018,6:4510-4515.
[71]YU C,XUAN T,YAN D,et al. Sesame-derived ions co-doped fluorescent carbon nanoparticles for bio-imaging,sensing and patterning applications[J]. Sensors and Actuators B:Chemical,2017,253:900-910.
[72]LECROY G E,MESSINA F,SCIORTINO A,et al. Characteristic excitation wavelength dependence of fluorescence emissions in carbon“quantum”dots[J]. The Journal of Physical Chemistry C,2017,121:28180-28186.
[73]PAN L,SUN S,ZHANG A,et al. Truly fluorescent excitation-dependent carbon dots and their applications in multicolor cellular imaging and multidimensional sensing[J]. Advanced Materials,2015,27:7782-7787.
[74]LAI Z,YANG X,LI A,et al. Facile preparation of full-color emissive carbon dots and their applications in imaging of the adhesion of erythrocytes to endothelial cells[J]. Journal of Materials Chemistry B,2017,5:5259-5264.
[75]YANG C,ZHU S,LI Z,et al. Nitrogen-doped carbon dots with excitation-independent long-wavelength emission produced by a room-temperature reaction[J]. Chemical Communications,2016,52:11912-11914.
[76]NIE H,LI M,LI Q,et al. Carbon dots with continuously tunable full-color emission and their application in ratiometric pH sensing[J]. Chemistry of Materials,2014,26:3104-3112.
[77]MENG X,CHANG Q,XUE C,et al. Full-colour carbon dots:from energy-efficient synthesis to concentration-dependent photoluminescence properties[J]. Chemical Communications,2017,53:3074-3077.
[78]WANG C,HU T,WEN Z,et al. Concentration-dependent color tunability of nitrogen-doped carbon dots and their application for iron(III)detection and multicolor bioimaging[J]. Journal of Colloid and Interface Science,2018,521:33-41.
[79]MU Y,WANG N,SUN Z,et al. Carbogenic nanodots derived from organo-templated zeolites with modulated full-color luminescence[J]. Chemical Science,2016,7:3564-3568.
[80]CHEN Y,LIAN H,WEI Y,et al. Concentration-induced multi-colored emissions in carbon dots:origination from triple fluorescent centers[J].Nanoscale,2018,10:6734-6743.
[81]REICHARDT C,WELTON T. Solvents and solvent effects in organic chemistry[M]. Hoboken:John Wiley&Sons,2011.
[82]WANG H,SUN C,CHEN X,et al. Excitation wavelength independent visible color emission of carbon dots[J]. Nanoscale,2017,9:1909-1915.
[83]CHAO D,LYU W,LIU Y,et al. Solvent-dependent carbon dots and their applications in detection of water in organic solvents[J]. Journal of Materials Chemistry C,2018,6:7527-7532.
[84]WU M,ZHAN J,GENG B,et al. Scalable synthesis of organic-soluble carbon quantum dots:superior optical properties in solvents,solids,and LEDs[J]. Nanoscale,2017,9:13195-13202.
[85]RECKMEIER C J,WANG Y,ZBORIL R,et al. Influence of doping and temperature on solvatochromic shifts in optical spectra of carbon dots[J].The Journal of Physical Chemistry C,2016,120:10591-10604.
[86]ZHANG T,ZHU J,ZHAI Y,et al. A novel mechanism for red emission carbon dots:hydrogen bond dominated molecular states emission[J].Nanoscale,2017,9:13042-13051.
[87]GAO D,LIU X,JIANG D,et al. Exploring of multicolor emissive carbon dots with novel double emission mechanism[J]. Sensors and Actuators B:Chemical,2018,277:373-380.
[88]JIANG K,WANG Y,GAO X,et al. Facile,quick,and gram-scale synthesis of ultralong-lifetime room-temperature-phosphorescent carbon dots by microwave irradiation[J]. Angewandte Chemie International Edition,2018,57:6216-6220.
[89]LIU J,WANG N,YU Y,et al. Carbon dots in zeolites:a new class of thermally activated delayed fluorescence materials with ultralong lifetimes[J]. Science Advances,2017,3:e1603171.
[90]XU H,CHEN R,SUN Q,et al. Recent progress in metal-organic complexes for optoelectronic applications[J]. Chemical Society Reviews,2014,43:3259-3302.
[91]MUKHERJEE S,THILAGAR P. Recent advances in purely organic phosphorescent materials[J]. Chemical Communications,2015,51:10988-11003.
[92]HIRATA S. Recent advances in materials with room-temperature phosphorescence:photophysics for triplet exciton stabilization[J]. Advanced Optical Materials,2017,5:1700116.
[93]DENG Y,ZHAO D,CHEN X,et al. Long lifetime pure organic phosphorescence based on water soluble carbon dots[J]. Chemical Communications,2013,49:5751-5753.
[94]JIANG K,ZHANG L,LU J,et al. Triple-mode emission of carbon dots:applications for advanced anti-counterfeiting[J]. Angewandte Chemie International Edition,2016,55:7231-7235.
[95]GE J,LAN M,ZHOU B,et al. A graphene quantum dot photodynamic therapy agent with high singlet oxygen generation[J]. Nature Communications,2014,5:4596.
[96]ZHOU X,LIANG H,JIANG P,et al. Multifunctional phosphorescent conjugated polymer dots for hypoxia imaging and photodynamic therapy of cancer cells[J]. Advanced Science,2016,3:1500155.
[97]HIRATA S,TOTANI K,ZHANG J,et al. Efficient persistent room temperature phosphorescence in organic amorphous materials under ambient conditions[J]. Advanced Functional Materials,2013,23:3386-3397.
[98]SEGURA-CARRETERO A,CRUCES-BLANCO C,CAN~ABATE-DAZ B,et al. Heavy-atom induced room-temperature phosphorescence:a straightforward methodology for the determination of organic compounds in solution[J]. Analytica Chimica Acta,2000,417:19-30.
[99]HENWOOD A F,LESIEUR M,BANSAL A K,et al. Palladium(0)NHC complexes:a new avenue to highly efficient phosphorescence[J].Chemical Science,2015,6:3248-3261.
[100]DONG X,WEI L,SU Y,et al. Efficient long lifetime room temperature phosphorescence of carbon dots in a potash alum matrix[J]. Journal of Materials Chemistry C,2015,3:2798-2801.
[101]LI Q,ZHOU M,YANG Q,et al. Efficient room-temperature phosphorescence from nitrogen-doped carbon dots in composite matrices[J]. Chemistry of Materials,2016,28:8221-8227.
[102]TAN J,ZOU R,ZHANG J,et al. Large-scale synthesis of n-doped carbon quantum dots and their phosphorescence properties in a polyurethane matrix[J]. Nanoscale,2016,8:4742-4747.
[103]JOSEPH J,ANAPPARA A A. Long life-time room-temperature phosphorescence of carbon dots in aluminum sulfate[J]. Chemistry Select,2017,2:4058-4062.
[104]JOSEPH J,ANAPPARA A A. White-light-emitting carbon dots prepared by the electrochemical exfoliation of graphite[J]. ChemPhysChem,2017,18:292-298.
[105]LONG P,FENG Y,CAO C,et al. Self-protective room-temperature phosphorescence of fluorine and nitrogen codoped carbon dots[J]. Advanced Functional Materials,2018,28:1800791.
[106]PAN L,SUN S,ZHANG L,et al. Near-infrared emissive carbon dots for two-photon fluorescence bioimaging[J]. Nanoscale,2016,8:17350-17356.
[107]WANG F,XIE Z,ZHANG B,et al. Down-and up-conversion luminescent carbon dot fluid:inkjet printing and gel glass fabrication[J].Nanoscale,2014,6:3818-3823.
[108]JIA X,LI J,WANG E. One-pot green synthesis of optically ph-sensitive carbon dots with upconversion luminescence[J]. Nanoscale,2012,4:5572-5575.
[109]LU S,SUI L,LIU J,et al. Near-infrared photoluminescent polymer-carbon nanodots with two-photon fluorescence[J]. Advanced Materials,2017,29:1603443.
[110]MIAO X,QU D,YANG D,et al. Synthesis of carbon dots with multiple color emission by controlled graphitization and surface functionalization[J]. Advanced Materials,2018,30:1704740.
[111]SK M A,ANANTHANARAYANAN A,HUANG L,et al. Revealing the tunable photoluminescence properties of graphene quantum dots[J].Journal of Materials Chemistry C,2014,2:6954-6960.
[112]KWON W,KIM Y H,LEE C L,et al. Electroluminescence from graphene quantum dots prepared by amidative cutting of tattered graphite[J].Nano Letters,2014,14:1306-1311.
[113]YEH T F,HUANG W L,CHUNG C J,et al. Elucidating quantum confinement in graphene oxide dots based on excitation-wavelength-independent photoluminescence[J]. The Journal of Physical Chemistry Letters,2016,7:2087-2092.
[114]YUAN F,YUAN T,SUI L,et al. Engineering triangular carbon quantum dots with unprecedented narrow bandwidth emission for multicolored LEDs[J]. Nature Communications,2018,9:2249.
[115]JIANG K,SUN S,ZHANG L,et al. Red,green,and blue luminescence by carbon dots:full-color emission tuning and multicolor cellular imaging[J]. Angewandte Chemie International Edition,2015,54:5360-5363.
[116]LIU Y,ZHANG T,WANG R,et al. A facile and universal strategy for preparation of long wavelength emission carbon dots[J]. Dalton Transactions,2017,46:16905-16910.
[117]ZHANG Y,YUAN R,HE M,et al. Multicolour nitrogen-doped carbon dots:tunable photoluminescence and sandwich fluorescent glass-based light-emitting diodes[J]. Nanoscale,2017,9:17849-17858.
[118]YUAN F,WANG Z,LI X,et al. Bright multicolor bandgap fluorescent carbon quantum dots for electroluminescent light-emitting diodes[J]. Advanced Materials,2017,29:1604436.
[119]KRYSMANN M J,KELARAKIS A,DALLAS P,et al. Formation mechanism of carbogenic nanoparticles with dual photoluminescence emission[J]. Journal of the American Chemical Society,2012,134:747-750.
[120]ZHU S,MENG Q,WANG L,et al. Highly photoluminescent carbon dots for multicolor patterning,sensors,and bioimaging[J]. Angewandte Chemie International Edition,2013,125:4045-4049.
[121]DONG Y,SHAO J,CHEN C,et al. Blue luminescent graphene quantum dots and graphene oxide prepared by tuning the carbonization degree of citric acid[J]. Carbon,2012,50:4738-4743.
[122]CHEN D,GAO H,CHEN X,et al. Excitation-independent dual-color carbon dots:surface-state controlling and solid-state lighting[J]. ACS Photonics,2017,4:2352-2358.
[123]WEN J,XU Y,LI H,et al. Recent applications of carbon nanomaterials in fluorescence biosensing and bioimaging[J]. Chemical Communications,2015,51:11346-11358.
[124]VAIJAYANTHIMALA V,CHANG H. Functionalized fluorescent nanodiamonds for biomedical applications[J]. Future Medicine,2009,47-55.
[125]LI X,RUI M,SONG J,et al. Carbon and graphene quantum dots for optoelectronic and energy devices:a review[J]. Advanced Functional Materials,2015,25:4929-4947.
[126]PENG H,TRAVAS-SEJDIC J. Simple aqueous solution route to luminescent carbogenic dots from carbohydrates[J]. Chemistry of Materials,2009,21:5563-5565.
[127]QU D,SUN Z,ZHENG M,et al. Three colors emission from S,N co-doped graphene quantum dots for visible light H2production and bioimaging[J]. Advanced Optical Materials,2015,3:360-367.
[128]WANG Y,ZHENG J,WANG J,et al. Rapid microwave-assisted synthesis of highly luminescent nitrogen-doped carbon dots for white light-emitting diodes[J]. Optical Materials,2017,73:319-329.
[129]LIU C,ZHANG P,TIAN F,et al. One-step synthesis of surface passivated carbon nanodots by microwave assisted pyrolysis for enhanced multicolor photoluminescence and bioimaging[J]. Journal of Materials Chemistry,2011,21:13163-13167.
[130]DING H,CHENG L W,MA Y Y,et al. Luminescent carbon quantum dots and their application in cell imaging[J]. New Journal of Chemistry,2013,37:2515-2520.
[131]ZHANG X,ZHANG Y,WANG Y,et al. Color-switchable electroluminescence of carbon dot light-emitting diodes[J]. ACS Nano,2013,7:11234-11241.
[132]ZHAI X,ZHANG P,LIU C,et al. Highly luminescent carbon nanodots by microwave-assisted pyrolysis[J]. Chemical Communications,2012,48:7955-7957.
[133]ZHU J,BAI X,CHEN X,et al. Carbon dots with efficient solid-state red-light emission through the step-by-step surface modification towards light-emitting diodes[J]. Dalton Transactions,2018,47:3811-3818.
[134]ZHU J,BAI X,ZHAI Y,et al. Carbon dots with efficient solid-state photoluminescence towards white light-emitting diodes[J]. Journal of Materials Chemistry C,2017,5:11416-11420.
[135]KUNDU A,LEE J,PARK B,et al. Facile approach to synthesize highly fluorescent multicolor emissive carbon dots via surface functionalization for cellular imaging[J]. Journal of Colloid and Interface Science,2018,513:505-514.
[136]TENG X,MA C,GE C,et al. Green synthesis of nitrogen-doped carbon dots from konjac flour with“off-on”fluorescence by Fe3+and L-lysine for bioimaging[J]. Journal of Materials Chemistry B,2014,2:4631-4639.
[137]PENG Y K,LAI C W,LIU C L,et al. A new and facile method to prepare uniform hollow MnO/functionalized m SiO2core/shell nanocomposites[J]. ACS Nano,2011,5:4177-4187.
[138]DING H,WEI J S,ZHANG P,et al. Solvent-controlled synthesis of highly luminescent carbon dots with a wide color gamut and narrowed emission peak widths[J]. Small,2018,14:e1800612.
[139]ZHAN J,GENG B,WU K,et al. A solvent-engineered molecule fusion strategy for rational synthesis of carbon quantum dots with multicolor bandgap fluorescence[J]. Carbon,2018,130:153-163.
[140]GONG X,LU W,LIU Y,et al. Low temperature synthesis of phosphorous and nitrogen co-doped yellow fluorescent carbon dots for sensing and bioimaging[J]. Journal of Materials Chemistry B,2015,3:6813-6819.
[141]KONG B,ZHU A,DING C,et al. Carbon dot-based inorganic-organic nanosystem for two-photon imaging and biosensing of pH variation in living cells and tissues[J]. Advanced Materials,2012,24:5844-5848.
[142]YUAN F,DING L,LI Y,et al. Multicolor fluorescent graphene quantum dots colorimetrically responsive to all-pH and a wide temperature range[J]. Nanoscale,2015,7:11727-11733.
[143]WANG Y,LU L,PENG H,et al. Multi-doped carbon dots with ratiometric pH sensing properties for monitoring enzyme catalytic reactions[J].Chemical Communications,2016,52:9247-9250.
[144]WANG S,COLE I S,ZHAO D,et al. The dual roles of functional groups in the photoluminescence of graphene quantum dots[J]. Nanoscale,2016,8:7449-7458.
[145]TANG L,JI R,CAO X,et al. Deep ultraviolet photoluminescence of water-soluble self-passivated graphene quantum dots[J]. ACS Nano,2012,6:5102-5110.
[146]KWON W,LIM J,LEE J,et al. Sulfur-incorporated carbon quantum dots with a strong long-wavelength absorption band[J]. Journal of Materials Chemistry C,2013,1:2002-2008.
[147]LI S,LI Y,CAO J,et al. Sulfur-doped graphene quantum dots as a novel fluorescent probe for highly selective and sensitive detection of Fe3+[J]. Analytical Chemistry,2014,86:10201-10207.
[148]KICIN'SKI W,SZALA M,BYSTRZEJEWSKI M. Sulfur-doped porous carbons:synthesis and applications[J]. Carbon,2014,68:1-32.
[149]QU D,ZHENG M,DU P,et al. Highly luminescent S,N co-doped graphene quantum dots with broad visible absorption bands for visible light photocatalysts[J]. Nanoscale,2013,5:12272-12277.
[150]KUNDU S,YADAV R M,NARAYANAN T,et al. Synthesis of N,F and S co-doped graphene quantum dots[J]. Nanoscale,2015,7:11515-11519.
[151]XU Q,KUANG T,LIU Y,et al. Heteroatom-doped carbon dots:synthesis,characterization,properties,photoluminescence mechanism and biological applications[J]. Journal of Materials Chemistry B,2016,4:7204-7219.
[152]QIAN Z,MA J,SHAN X,et al. Highly luminescent n-doped carbon quantum dots as an effective multifunctional fluorescence sensing platform[J]. Chemistry-A European Journal,2014,20:2254-2263.
[153]QU D,ZHENG M,ZHANG L,et al. Formation mechanism and optimization of highly luminescent n-doped graphene quantum dots[J]. Scientific Reports,2014,4:5294.
[154]CHANDRA S,PATRA P,PATHAN S H,et al. Luminescent S-doped carbon dots:an emergent architecture for multimodal applications[J].Journal of Materials Chemistry B,2013,1:2375-2382.
[155]XU Q,PU P,ZHAO J,et al. Preparation of highly photoluminescent sulfur-doped carbon dots for Fe(III)detection[J]. Journal of Materials Chemistry A,2015,3:542-546.
[156]LI D,JING P,SUN L,et al. Near-infrared excitation/emission and multiphoton-induced fluorescence of carbon dots[J]. Advanced Materials,2018,30:1705913.
[157]QIAN Z,SHAN X,CHAI L,et al. Si-doped carbon quantum dots:a facile and general preparation strategy,bioimaging application,and multifunctional sensor[J]. ACS Applied Materials&Interfaces,2014,6:6797-6805.
[158]ZHOU J,SHAN X,MA J,et al. Facile synthesis of P-doped carbon quantum dots with highly efficient photoluminescence[J]. RSC Advances,2014,4:5465-5468.
[159]LI Y,LIN H,LUO C,et al. Aggregation induced red shift emission of phosphorus doped carbon dots[J]. RSC Advances,2017,7:32225-32228.
[160]HAI X,MAO Q X,WANG W J,et al. An acid-free microwave approach to prepare highly luminescent boron-doped graphene quantum dots for cell imaging[J]. Journal of Materials Chemistry B,2015,3:9109-9114.
[161]DONG Y,PANG H,YANG H B,et al. Carbon-based dots co-doped with nitrogen and sulfur for high quantum yield and excitation-independent emission[J]. Angewandte Chemie International Edition,2013,52:7800-7804.
[162]LI L,DONG T. Photoluminescence tuning in carbon dots:surface passivation or/and functionalization,heteroatom doping[J]. Journal of Materials Chemistry C,2018,6:7944-7970.
[163]WANG M S,GUO G C. Inorganic-organic hybrid white light phosphors[J]. Chemical Communications,2016,52:13194-13204.
[164]MAO L H,TANG W Q,DENG Z Y,et al. Facile access to white fluorescent carbon dots toward light-emitting devices[J]. Industrial&Engineering Chemistry Research,2014,53:6417-6425.
[165]ZHAI Y,WANG Y,LI D,et al. Red carbon dots-based phosphors for white light-emitting diodes with color rendering index of 92[J]. Journal of Colloid and Interface Science,2018,528:281-288.
[166]YUAN B,GUAN S,SUN X,et al. Highly efficient carbon dots with reversibly switchable green-red emissions for trichromatic white light-emitting diodes[J]. ACS Applied Materials&Interfaces,2018,10:16005-16014.
[167]YUAN B,XIE Z,CHEN P,et al. Highly efficient carbon dots and their nanohybrids for trichromatic white leds[J]. Journal of Materials Chemistry C,2018,6:5957-5963.
[168]QIN X,LU W,ASIRI A M,et al. Microwave-assisted rapid green synthesis of photoluminescent carbon nanodots from flour and their applications for sensitive and selective detection of mercury(II)ions[J]. Sensors and Actuators B:Chemical,2013,184:156-162.
[169]ZHU P P,CHENG Z,DU L L,et al. Synthesis of the Cu-doped dual-emission fluorescent carbon dots and its analytical application[J]. Langmuir,2018,34:9982-9989.
[170]YAN F,BAI Z,CHEN Y,et al. Ratiometric fluorescent detection of copper ions using coumarin-functionalized carbon dots based on fret[J].Sensors and Actuators B:Chemical,2018,275:86-94.
[171]HE Y S,PAN C G,CAO H X,et al. Highly sensitive and selective dual-emission ratiometric fluorescence detection of dopamine based on carbon dots-gold nanoclusters hybrid[J]. Sensors and Actuators B:Chemical,2018,265:371-377.
[172]WANG Q,PANG H,DONG Y,et al. Colorimetric determination of glutathione by using a nanohybrid composed of manganese dioxide and carbon dots[J]. Microchimica Acta,2018,185:291.
[173]HUANG S,YANG E,LIU Y,et al. Low-temperature rapid synthesis of nitrogen and phosphorus dual-doped carbon dots for multicolor cellular imaging and hemoglobin probing in human blood[J]. Sensors and Actuators B:Chemical,2018,265:326-334.
[174]LI H,YAN X,QIAO S,et al. Yellow-emissive carbon dot-based optical sensing platforms:cell imaging and analytical applications for biocatalytic reactions[J]. ACS Applied Materials&Interfaces,2018,10:7737-7744.
[175]GONG X,ZHANG Q,GAO Y,et al. Phosphorus and nitrogen dual-doped hollow carbon dot as a nanocarrier for doxorubicin delivery and biological imaging[J]. ACS Applied Materials&Interfaces,2016,8:11288-11297.
[176]CHIZHIK A M,STEIN S,DEKALIUK M O,et al. Super-resolution optical fluctuation bio-imaging with dual-color carbon nanodots[J]. Nano Letters,2016,16:237-242.
[177]LEMENAGER G,DE LUCA E,SUN Y P,et al. Super-resolution fluorescence imaging of biocompatible carbon dots[J]. Nanoscale,2014,6:8617-8623.
[178]LIU Y,ZHOU L,LI Y,et al. Highly fluorescent nitrogen-doped carbon dots with excellent thermal and photo stability applied as invisible ink for loading important information and anti-counterfeiting[J]. Nanoscale,2017,9:491-496.
[179]JIANG K,WANG Y,CAI C,et al. Conversion of carbon dots from fluorescence to ultralong room-temperature phosphorescence by heating for security applications[J]. Advanced Materials,2018,30:1800783.
[180]KALYTCHUK S,WANG Y,POLAKOVA K,et al. Carbon dot fluorescence-lifetime-encoded anti-counterfeiting[J]. ACS Applied Materials&Interfaces,2018,10:29902-29908.
[2]BOURLINOS A B,STASSINOPOULOS A,ANGLOS D,et al. Photoluminescent carbogenic dots[J]. Chemistry of Materials,2008,20:4539-4541.
[3]BOURLINOS A B,STASSINOPOULOS A,ANGLOS D,et al. Surface functionalized carbogenic quantum dots[J]. Small,2008,4:455-458.
[4]CAO L,WANG X,MEZIANI M J,et al. Carbon dots for multiphoton bioimaging[J]. Journal of the American Chemical Society,2007,129:11318-11319.
[5]LU J,YANG J X,WANG J,et al. One-pot synthesis of fluorescent carbon nanoribbons,nanoparticles,and graphene by the exfoliation of graphite in ionic liquids[J]. ACS Nano,2009,3:2367-2375.
[6]FU M,EHRAT F,WANG Y,et al. Carbon dots:a unique fluorescent cocktail of polycyclic aromatic hydrocarbons[J]. Nano Letters,2015,15:6030-6035.
[7]SCHMIDT R,KRASSELT C,GHLER C,et al. The fluorescence intermittency for quantum dots is not power-law distributed:a luminescence intensity resolved approach[J]. ACS Nano,2014,8:3506-3521.
[8]CHOI Y,KANG B,LEE J,et al. Integrative approach toward uncovering the origin of photoluminescence in dual heteroatom-doped carbon nanodots[J]. Chemistry of Materials,2016,28:6840-6847.
[9]SAHU S,BEHERA B,MAITI T K,et al. Simple one-step synthesis of highly luminescent carbon dots from orange juice:application as excellent bio-imaging agents[J]. Chemical Communications,2012,48:8835-8837.
[10]DUTTA CHOUDHURY S,CHETHODIL J M,GHARAT P M,et al. p H-elicited luminescence functionalities of carbon dots:mechanistic insights[J]. The Journal of Physical Chemistry Letters,2017,8:1389-1395.
[11]XIE R,WANG Z,ZHOU W,et al. Graphene quantum dots as smart probes for biosensing[J]. Analytical Methods,2016,8:4001-4016.
[12]YUAN F,WANG Z,LI X,et al. Bright multicolor bandgap fluorescent carbon quantum dots for electroluminescent light-emitting diodes[J]. Advanced Materials,2017,29:1604436.
[13]ZHU B,SUN S,WANG Y,et al. Preparation of carbon nanodots from single chain polymeric nanoparticles and theoretical investigation of the photoluminescence mechanism[J]. Journal of Materials Chemistry C,2013,1:580-586.
[14]PENG J,GAO W,GUPTA B K,et al. Graphene quantum dots derived from carbon fibers[J]. Nano Letters,2012,12:844-849.
[15]HU S L,NIU K Y,SUN J,et al. One-step synthesis of fluorescent carbon nanoparticles by laser irradiation[J]. Journal of Materials Chemistry,2009,19:484-488.
[16]STRAUSS V,MARGRAF J T,DOLLE C,et al. Carbon nanodots:toward a comprehensive understanding of their photoluminescence[J]. Journal of the American Chemical Society,2014,136:17308-17316.
[17]SUN Y P,ZHOU B,LIN Y,et al. Quantum-sized carbon dots for bright and colorful photoluminescence[J]. Journal of the American Chemical Society,2006,128:7756-7757.
[18]LIN L,ZHANG S. Creating high yield water soluble luminescent graphene quantum dots via exfoliating and disintegrating carbon nanotubes and graphite flakes[J]. Chemical Communications,2012,48:10177-10179.
[19]ZHENG L,CHI Y,DONG Y,et al. Electrochemiluminescence of water-soluble carbon nanocrystals released electrochemically from graphite[J].Journal of the American Chemical Society,2009,131:4564-4565.
[20]MING H,MA Z,LIU Y,et al. Large scale electrochemical synthesis of high quality carbon nanodots and their photocatalytic property[J]. Dalton Transactions,2012,41:9526-9531.
[21]LI H,HE X,KANG Z,et al. Water-soluble fluorescent carbon quantum dots and photocatalyst design[J]. Angewandte Chemie International Edition,2010,49:4430-4434.
[22]RUSSO P,LIANG R,JABARI E,et al. Single-step synthesis of graphene quantum dots by femtosecond laser ablation of graphene oxide dispersions[J]. Nanoscale,2016,8:8863-8877.
[23]RUSSO P,HU A,COMPAGNINI G,et al. Femtosecond laser ablation of highly oriented pyrolytic graphite:a green route for large-scale production of porous graphene and graphene quantum dots[J]. Nanoscale,2014,6:2381-2389.
[24]ZHOU J,BOOKER C,LI R,et al. An electrochemical avenue to blue luminescent nanocrystals from multiwalled carbon nanotubes(MWCNTs)[J]. Journal of the American Chemical Society,2007,129:744-745.
[25]LIU H,YE T,MAO C. Fluorescent carbon nanoparticles derived from candle soot[J]. Angewandte Chemie International Edition,2007,119:6593-6595.
[26]MENG X,CHANG Q,XUE C,et al. Full-colour carbon dots:from energy-efficient synthesis to concentration-dependent photoluminescence properties[J]. Chemical Communications,2017,53:3074-3077.
[27]BAO L,LIU C,ZHANG Z L,et al. Photoluminescence-tunable carbon nanodots:surface-state energy-gap tuning[J]. Advanced Materials,2015,27:1663-1667.
[28]WANG X,QU K,XU B,et al. Microwave assisted one-step green synthesis of cell-permeable multicolor photoluminescent carbon dots without surface passivation reagents[J]. Journal of Materials Chemistry,2011,21:2445-2450.
[29]XU M,HE G,LI Z,et al. A green heterogeneous synthesis of N-doped carbon dots and their photoluminescence applications in solid and aqueous states[J]. Nanoscale,2014,6:10307-10315.
[30]QU S,WANG X,LU Q,et al. A biocompatible fluorescent ink based on water-soluble luminescent carbon nanodots[J]. Angewandte Chemie International Edition,2012,51:12215-12218.
[31]QU S,ZHOU D,LI D,et al. Toward efficient orange emissive carbon nanodots through conjugated sp2-domain controlling and surface charges engineering[J]. Advanced Materials,2016,28:3516-3521.
[32]TIAN Z,ZHANG X,LI D,et al. Full-color inorganic carbon dot phosphors for white-light-emitting diodes[J]. Advanced Optical Materials,2017,5:1700416.
[33]ZHU S,MENG Q,WANG L,et al. Highly photoluminescent carbon dots for multicolor patterning,sensors,and bioimaging[J]. Angewandte Chemie International Edition,2013,52:3953-3957.
[34]BHUSHAN B,KUMAR S U,GOPINATH P. Multifunctional carbon dots as efficient fluorescent nanotags for tracking cells through successive generations[J]. Journal of Materials Chemistry B,2016,4:4862-4871.
[35]WANG J,GAO M,HO G W. Bidentate-complex-derived Ti O2/carbon dot photocatalysts:in situ synthesis,versatile heterostructures,and enhanced H2evolution[J]. Journal of Materials Chemistry A,2014,2:5703-5709.
[36]QU K,WANG J,REN J,et al. Carbon dots prepared by hydrothermal treatment of dopamine as an effective fluorescent sensing platform for the label-free detection of iron(iii)ions and dopamine[J]. Chemistry-A European Journal,2013,19:7243-7249.
[37]YANG Z,XU M,LIU Y,et al. Nitrogen-doped,carbon-rich,highly photoluminescent carbon dots from ammonium citrate[J]. Nanoscale,2014,6:1890-1895.
[38]MA Y,CHEN Y,LIU J,et al. Ratiometric fluorescent detection of chromium(vi)in real samples based on dual emissive carbon dots[J]. Talanta,2018,185:249-257.
[39]LI C,LIU W,SUN X,et al. Excitation dependent emission combined with different quenching manners supports carbon dots to achieve multi-mode sensing[J]. Sensors and Actuators B:Chemical,2018,263:1-9.
[40]DING H,WEI J S,XIONG H M. Nitrogen and sulfur co-doped carbon dots with strong blue luminescence[J]. Nanoscale,2014,6:13817-13823.
[41]SONG Y,ZHU S,ZHANG S,et al. Investigation from chemical structure to photoluminescent mechanism:a type of carbon dots from the pyrolysis of citric acid and an amine[J]. Journal of Materials Chemistry C,2015,3:5976-5984.
[42]ZHU S,ZHAO X,SONG Y,et al. Beyond bottom-up carbon nanodots:citric-acid derived organic molecules[J]. Nano Today,2016,11:128-132.
[43]JIANG D,ZHAO H,YANG Y,et al. Investigation of luminescent mechanism:N-rich carbon dots as luminescence centers in fluorescent hydroxyapatite prepared using a typical hydrothermal process[J]. Journal of Materials Chemistry B,2017,5:3749-3757.
[44]WANG J,WANG C F,CHEN S. Amphiphilic egg-derived carbon dots:rapid plasma fabrication,pyrolysis process,and multicolor printing patterns[J]. Angewandte Chemie International Edition,2012,51:9297-9301.
[45]LAI C W,HSIAO Y H,PENG Y K,et al. Facile synthesis of highly emissive carbon dots from pyrolysis of glycerol; gram scale production of carbon dots/m SiO2for cell imaging and drug release[J]. Journal of Materials Chemistry,2012,22:14403-14409.
[46]FANG Y,GUO S,LI D,et al. Easy synthesis and imaging applications of cross-linked green fluorescent hollow carbon nanoparticles[J]. ACS Nano,2011,6:400-409.
[47]CUI Y,BU X,ZOU H,et al. A dual solvent evaporation route for preserving carbon nanoparticle fluorescence in silica gel and producing white light-emitting diodes[J]. Materials Chemistry Frontiers,2017,1:387-393.
[48]PHAM-TRUONG T N,PETENZI T,RANJAN C,et al. Microwave assisted synthesis of carbon dots in ionic liquid as metal free catalyst for highly selective production of hydrogen peroxide[J]. Carbon,2018,130:544-552.
[49]HUANG T,WU T,ZHU Z,et al. Self-assembly facilitated and visible light-driven generation of carbon dots[J]. Chemical Communications,2018,54:5960-5963.
[50]YANG S,ZENG H,ZHAO H,et al. Luminescent hollow carbon shells and fullerene-like carbon spheres produced by laser ablation with toluene[J]. Journal of Materials Chemistry,2011,21:4432-4436.
[51]WANG Z,YUAN F,LI X,et al. 53%efficient red emissive carbon quantum dots for high color rendering and stable warm white-light-emitting diodes[J]. Advanced Materials,2017,29:1702910.
[52]MIAO H,WANG Y,YANG X. Carbon dots derived from tobacco for visually distinguishing and detecting three kinds of tetracyclines[J].Nanoscale,2018,10:8139-8145.
[53]ZHENG M,WANG C,WANG Y,et al. Green synthesis of carbon dots functionalized silver nanoparticles for the colorimetric detection of phoxim[J]. Talanta,2018,185:309-315.
[54]WU S,LI W,ZHOU W,et al. Large-scale one-step synthesis of carbon dots from yeast extract powder and construction of carbon dots/PVA fluorescent shape memory material[J]. Advanced Optical Materials,2018,6:1701150.
[55]LIU L,GONG H,LI D,et al. Synthesis of carbon dots from pear juice for fluorescence detection of Cu2+ion in water[J]. Journal of Nanoscience and Nanotechnology,2018,18:5327-5332.
[56]DING H,JI Y,WEI J S,et al. Facile synthesis of red-emitting carbon dots from pulp-free lemon juice for bioimaging[J]. Journal of Materials Chemistry B,2017,5:5272-5277.
[57]ATCHUDAN R,EDISON T N J I,LEE Y R. Nitrogen-doped carbon dots originating from unripe peach for fluorescent bioimaging and electrocatalytic oxygen reduction reaction[J]. Journal of Colloid and Interface Science,2016,482:8-18.
[58]HUANG H,LV J J,ZHOU D L,et al. One-pot green synthesis of nitrogen-doped carbon nanoparticles as fluorescent probes for mercury ions[J].RSC Advances,2013,3:21691-21696.
[59]LIU S,TIAN J,WANG L,et al. Hydrothermal treatment of grass:a low-cost,green route to nitrogen-doped,carbon-rich,photoluminescent polymer nanodots as an effective fluorescent sensing platform for label-free detection of Cu(II)ions[J]. Advanced Materials,2012,24:2037-2041.
[60]JEONG C J,ROY A K,KIM S H,et al. Fluorescent carbon nanoparticles derived from natural materials of mango fruit for bio-imaging probes[J].Nanoscale,2014,6:15196-15202.
[61]ZHOU J,SHENG Z,HAN H,et al. Facile synthesis of fluorescent carbon dots using watermelon peel as a carbon source[J]. Materials Letters,2012,66:222-224.
[62]ALAM A M,PARK B Y,GHOURI Z K,et al. Synthesis of carbon quantum dots from cabbage with down-and up-conversion photoluminescence properties:excellent imaging agent for biomedical applications[J]. Green Chemistry,2015,17:3791-3797.
[63]WANG Q,LIU X,ZHANG L,et al. Microwave-assisted synthesis of carbon nanodots through an eggshell membrane and their fluorescent application[J]. Analyst,2012,137:5392-5397.
[64]WANG J,SAHU S,SONKAR S K,et al. Versatility with carbon dots-from overcooked BBQ to brightly fluorescent agents and photocatalysts[J].RSC Advances,2013,3:15604-15607.
[65]YU J,SONG N,ZHANG Y K,et al. Green preparation of carbon dots by jinhua bergamot for sensitive and selective fluorescent detection of Hg2+and Fe3+[J]. Sensors and Actuators B:Chemical,2015,214:29-35.
[66]FENG J,WANG W J,HAI X,et al. Green preparation of nitrogen-doped carbon dots derived from silkworm chrysalis for cell imaging[J]. Journal of Materials Chemistry B,2016,4:387-393.
[67]MEHTA V N,JHA S,BASU H,et al. One-step hydrothermal approach to fabricate carbon dots from apple juice for imaging of mycobacterium and fungal cells[J]. Sensors and Actuators B:Chemical,2015,213:434-443.
[68]LIN P Y,HSIEH C W,KUNG M L,et al. Eco-friendly synthesis of shrimp egg-derived carbon dots for fluorescent bioimaging[J]. Journal of Biotechnology,2014,189:114-119.
[69]SU A,ZHONG Q,CHEN Y. et al. Preparation of carbon quantum dots from cigarette filters and its application for fluorescence detection of Sudan I[J]. Analytica Chimica Acta,2018,1023:115-120.
[70]JEONG Y,MOON K,JEONG S,et al. Converting waste papers to fluorescent carbon dots in the recycling process without loss of ionic liquids and bioimaging applications[J]. ACS Sustainable Chemistry&Engineering,2018,6:4510-4515.
[71]YU C,XUAN T,YAN D,et al. Sesame-derived ions co-doped fluorescent carbon nanoparticles for bio-imaging,sensing and patterning applications[J]. Sensors and Actuators B:Chemical,2017,253:900-910.
[72]LECROY G E,MESSINA F,SCIORTINO A,et al. Characteristic excitation wavelength dependence of fluorescence emissions in carbon“quantum”dots[J]. The Journal of Physical Chemistry C,2017,121:28180-28186.
[73]PAN L,SUN S,ZHANG A,et al. Truly fluorescent excitation-dependent carbon dots and their applications in multicolor cellular imaging and multidimensional sensing[J]. Advanced Materials,2015,27:7782-7787.
[74]LAI Z,YANG X,LI A,et al. Facile preparation of full-color emissive carbon dots and their applications in imaging of the adhesion of erythrocytes to endothelial cells[J]. Journal of Materials Chemistry B,2017,5:5259-5264.
[75]YANG C,ZHU S,LI Z,et al. Nitrogen-doped carbon dots with excitation-independent long-wavelength emission produced by a room-temperature reaction[J]. Chemical Communications,2016,52:11912-11914.
[76]NIE H,LI M,LI Q,et al. Carbon dots with continuously tunable full-color emission and their application in ratiometric pH sensing[J]. Chemistry of Materials,2014,26:3104-3112.
[77]MENG X,CHANG Q,XUE C,et al. Full-colour carbon dots:from energy-efficient synthesis to concentration-dependent photoluminescence properties[J]. Chemical Communications,2017,53:3074-3077.
[78]WANG C,HU T,WEN Z,et al. Concentration-dependent color tunability of nitrogen-doped carbon dots and their application for iron(III)detection and multicolor bioimaging[J]. Journal of Colloid and Interface Science,2018,521:33-41.
[79]MU Y,WANG N,SUN Z,et al. Carbogenic nanodots derived from organo-templated zeolites with modulated full-color luminescence[J]. Chemical Science,2016,7:3564-3568.
[80]CHEN Y,LIAN H,WEI Y,et al. Concentration-induced multi-colored emissions in carbon dots:origination from triple fluorescent centers[J].Nanoscale,2018,10:6734-6743.
[81]REICHARDT C,WELTON T. Solvents and solvent effects in organic chemistry[M]. Hoboken:John Wiley&Sons,2011.
[82]WANG H,SUN C,CHEN X,et al. Excitation wavelength independent visible color emission of carbon dots[J]. Nanoscale,2017,9:1909-1915.
[83]CHAO D,LYU W,LIU Y,et al. Solvent-dependent carbon dots and their applications in detection of water in organic solvents[J]. Journal of Materials Chemistry C,2018,6:7527-7532.
[84]WU M,ZHAN J,GENG B,et al. Scalable synthesis of organic-soluble carbon quantum dots:superior optical properties in solvents,solids,and LEDs[J]. Nanoscale,2017,9:13195-13202.
[85]RECKMEIER C J,WANG Y,ZBORIL R,et al. Influence of doping and temperature on solvatochromic shifts in optical spectra of carbon dots[J].The Journal of Physical Chemistry C,2016,120:10591-10604.
[86]ZHANG T,ZHU J,ZHAI Y,et al. A novel mechanism for red emission carbon dots:hydrogen bond dominated molecular states emission[J].Nanoscale,2017,9:13042-13051.
[87]GAO D,LIU X,JIANG D,et al. Exploring of multicolor emissive carbon dots with novel double emission mechanism[J]. Sensors and Actuators B:Chemical,2018,277:373-380.
[88]JIANG K,WANG Y,GAO X,et al. Facile,quick,and gram-scale synthesis of ultralong-lifetime room-temperature-phosphorescent carbon dots by microwave irradiation[J]. Angewandte Chemie International Edition,2018,57:6216-6220.
[89]LIU J,WANG N,YU Y,et al. Carbon dots in zeolites:a new class of thermally activated delayed fluorescence materials with ultralong lifetimes[J]. Science Advances,2017,3:e1603171.
[90]XU H,CHEN R,SUN Q,et al. Recent progress in metal-organic complexes for optoelectronic applications[J]. Chemical Society Reviews,2014,43:3259-3302.
[91]MUKHERJEE S,THILAGAR P. Recent advances in purely organic phosphorescent materials[J]. Chemical Communications,2015,51:10988-11003.
[92]HIRATA S. Recent advances in materials with room-temperature phosphorescence:photophysics for triplet exciton stabilization[J]. Advanced Optical Materials,2017,5:1700116.
[93]DENG Y,ZHAO D,CHEN X,et al. Long lifetime pure organic phosphorescence based on water soluble carbon dots[J]. Chemical Communications,2013,49:5751-5753.
[94]JIANG K,ZHANG L,LU J,et al. Triple-mode emission of carbon dots:applications for advanced anti-counterfeiting[J]. Angewandte Chemie International Edition,2016,55:7231-7235.
[95]GE J,LAN M,ZHOU B,et al. A graphene quantum dot photodynamic therapy agent with high singlet oxygen generation[J]. Nature Communications,2014,5:4596.
[96]ZHOU X,LIANG H,JIANG P,et al. Multifunctional phosphorescent conjugated polymer dots for hypoxia imaging and photodynamic therapy of cancer cells[J]. Advanced Science,2016,3:1500155.
[97]HIRATA S,TOTANI K,ZHANG J,et al. Efficient persistent room temperature phosphorescence in organic amorphous materials under ambient conditions[J]. Advanced Functional Materials,2013,23:3386-3397.
[98]SEGURA-CARRETERO A,CRUCES-BLANCO C,CAN~ABATE-DAZ B,et al. Heavy-atom induced room-temperature phosphorescence:a straightforward methodology for the determination of organic compounds in solution[J]. Analytica Chimica Acta,2000,417:19-30.
[99]HENWOOD A F,LESIEUR M,BANSAL A K,et al. Palladium(0)NHC complexes:a new avenue to highly efficient phosphorescence[J].Chemical Science,2015,6:3248-3261.
[100]DONG X,WEI L,SU Y,et al. Efficient long lifetime room temperature phosphorescence of carbon dots in a potash alum matrix[J]. Journal of Materials Chemistry C,2015,3:2798-2801.
[101]LI Q,ZHOU M,YANG Q,et al. Efficient room-temperature phosphorescence from nitrogen-doped carbon dots in composite matrices[J]. Chemistry of Materials,2016,28:8221-8227.
[102]TAN J,ZOU R,ZHANG J,et al. Large-scale synthesis of n-doped carbon quantum dots and their phosphorescence properties in a polyurethane matrix[J]. Nanoscale,2016,8:4742-4747.
[103]JOSEPH J,ANAPPARA A A. Long life-time room-temperature phosphorescence of carbon dots in aluminum sulfate[J]. Chemistry Select,2017,2:4058-4062.
[104]JOSEPH J,ANAPPARA A A. White-light-emitting carbon dots prepared by the electrochemical exfoliation of graphite[J]. ChemPhysChem,2017,18:292-298.
[105]LONG P,FENG Y,CAO C,et al. Self-protective room-temperature phosphorescence of fluorine and nitrogen codoped carbon dots[J]. Advanced Functional Materials,2018,28:1800791.
[106]PAN L,SUN S,ZHANG L,et al. Near-infrared emissive carbon dots for two-photon fluorescence bioimaging[J]. Nanoscale,2016,8:17350-17356.
[107]WANG F,XIE Z,ZHANG B,et al. Down-and up-conversion luminescent carbon dot fluid:inkjet printing and gel glass fabrication[J].Nanoscale,2014,6:3818-3823.
[108]JIA X,LI J,WANG E. One-pot green synthesis of optically ph-sensitive carbon dots with upconversion luminescence[J]. Nanoscale,2012,4:5572-5575.
[109]LU S,SUI L,LIU J,et al. Near-infrared photoluminescent polymer-carbon nanodots with two-photon fluorescence[J]. Advanced Materials,2017,29:1603443.
[110]MIAO X,QU D,YANG D,et al. Synthesis of carbon dots with multiple color emission by controlled graphitization and surface functionalization[J]. Advanced Materials,2018,30:1704740.
[111]SK M A,ANANTHANARAYANAN A,HUANG L,et al. Revealing the tunable photoluminescence properties of graphene quantum dots[J].Journal of Materials Chemistry C,2014,2:6954-6960.
[112]KWON W,KIM Y H,LEE C L,et al. Electroluminescence from graphene quantum dots prepared by amidative cutting of tattered graphite[J].Nano Letters,2014,14:1306-1311.
[113]YEH T F,HUANG W L,CHUNG C J,et al. Elucidating quantum confinement in graphene oxide dots based on excitation-wavelength-independent photoluminescence[J]. The Journal of Physical Chemistry Letters,2016,7:2087-2092.
[114]YUAN F,YUAN T,SUI L,et al. Engineering triangular carbon quantum dots with unprecedented narrow bandwidth emission for multicolored LEDs[J]. Nature Communications,2018,9:2249.
[115]JIANG K,SUN S,ZHANG L,et al. Red,green,and blue luminescence by carbon dots:full-color emission tuning and multicolor cellular imaging[J]. Angewandte Chemie International Edition,2015,54:5360-5363.
[116]LIU Y,ZHANG T,WANG R,et al. A facile and universal strategy for preparation of long wavelength emission carbon dots[J]. Dalton Transactions,2017,46:16905-16910.
[117]ZHANG Y,YUAN R,HE M,et al. Multicolour nitrogen-doped carbon dots:tunable photoluminescence and sandwich fluorescent glass-based light-emitting diodes[J]. Nanoscale,2017,9:17849-17858.
[118]YUAN F,WANG Z,LI X,et al. Bright multicolor bandgap fluorescent carbon quantum dots for electroluminescent light-emitting diodes[J]. Advanced Materials,2017,29:1604436.
[119]KRYSMANN M J,KELARAKIS A,DALLAS P,et al. Formation mechanism of carbogenic nanoparticles with dual photoluminescence emission[J]. Journal of the American Chemical Society,2012,134:747-750.
[120]ZHU S,MENG Q,WANG L,et al. Highly photoluminescent carbon dots for multicolor patterning,sensors,and bioimaging[J]. Angewandte Chemie International Edition,2013,125:4045-4049.
[121]DONG Y,SHAO J,CHEN C,et al. Blue luminescent graphene quantum dots and graphene oxide prepared by tuning the carbonization degree of citric acid[J]. Carbon,2012,50:4738-4743.
[122]CHEN D,GAO H,CHEN X,et al. Excitation-independent dual-color carbon dots:surface-state controlling and solid-state lighting[J]. ACS Photonics,2017,4:2352-2358.
[123]WEN J,XU Y,LI H,et al. Recent applications of carbon nanomaterials in fluorescence biosensing and bioimaging[J]. Chemical Communications,2015,51:11346-11358.
[124]VAIJAYANTHIMALA V,CHANG H. Functionalized fluorescent nanodiamonds for biomedical applications[J]. Future Medicine,2009,47-55.
[125]LI X,RUI M,SONG J,et al. Carbon and graphene quantum dots for optoelectronic and energy devices:a review[J]. Advanced Functional Materials,2015,25:4929-4947.
[126]PENG H,TRAVAS-SEJDIC J. Simple aqueous solution route to luminescent carbogenic dots from carbohydrates[J]. Chemistry of Materials,2009,21:5563-5565.
[127]QU D,SUN Z,ZHENG M,et al. Three colors emission from S,N co-doped graphene quantum dots for visible light H2production and bioimaging[J]. Advanced Optical Materials,2015,3:360-367.
[128]WANG Y,ZHENG J,WANG J,et al. Rapid microwave-assisted synthesis of highly luminescent nitrogen-doped carbon dots for white light-emitting diodes[J]. Optical Materials,2017,73:319-329.
[129]LIU C,ZHANG P,TIAN F,et al. One-step synthesis of surface passivated carbon nanodots by microwave assisted pyrolysis for enhanced multicolor photoluminescence and bioimaging[J]. Journal of Materials Chemistry,2011,21:13163-13167.
[130]DING H,CHENG L W,MA Y Y,et al. Luminescent carbon quantum dots and their application in cell imaging[J]. New Journal of Chemistry,2013,37:2515-2520.
[131]ZHANG X,ZHANG Y,WANG Y,et al. Color-switchable electroluminescence of carbon dot light-emitting diodes[J]. ACS Nano,2013,7:11234-11241.
[132]ZHAI X,ZHANG P,LIU C,et al. Highly luminescent carbon nanodots by microwave-assisted pyrolysis[J]. Chemical Communications,2012,48:7955-7957.
[133]ZHU J,BAI X,CHEN X,et al. Carbon dots with efficient solid-state red-light emission through the step-by-step surface modification towards light-emitting diodes[J]. Dalton Transactions,2018,47:3811-3818.
[134]ZHU J,BAI X,ZHAI Y,et al. Carbon dots with efficient solid-state photoluminescence towards white light-emitting diodes[J]. Journal of Materials Chemistry C,2017,5:11416-11420.
[135]KUNDU A,LEE J,PARK B,et al. Facile approach to synthesize highly fluorescent multicolor emissive carbon dots via surface functionalization for cellular imaging[J]. Journal of Colloid and Interface Science,2018,513:505-514.
[136]TENG X,MA C,GE C,et al. Green synthesis of nitrogen-doped carbon dots from konjac flour with“off-on”fluorescence by Fe3+and L-lysine for bioimaging[J]. Journal of Materials Chemistry B,2014,2:4631-4639.
[137]PENG Y K,LAI C W,LIU C L,et al. A new and facile method to prepare uniform hollow MnO/functionalized m SiO2core/shell nanocomposites[J]. ACS Nano,2011,5:4177-4187.
[138]DING H,WEI J S,ZHANG P,et al. Solvent-controlled synthesis of highly luminescent carbon dots with a wide color gamut and narrowed emission peak widths[J]. Small,2018,14:e1800612.
[139]ZHAN J,GENG B,WU K,et al. A solvent-engineered molecule fusion strategy for rational synthesis of carbon quantum dots with multicolor bandgap fluorescence[J]. Carbon,2018,130:153-163.
[140]GONG X,LU W,LIU Y,et al. Low temperature synthesis of phosphorous and nitrogen co-doped yellow fluorescent carbon dots for sensing and bioimaging[J]. Journal of Materials Chemistry B,2015,3:6813-6819.
[141]KONG B,ZHU A,DING C,et al. Carbon dot-based inorganic-organic nanosystem for two-photon imaging and biosensing of pH variation in living cells and tissues[J]. Advanced Materials,2012,24:5844-5848.
[142]YUAN F,DING L,LI Y,et al. Multicolor fluorescent graphene quantum dots colorimetrically responsive to all-pH and a wide temperature range[J]. Nanoscale,2015,7:11727-11733.
[143]WANG Y,LU L,PENG H,et al. Multi-doped carbon dots with ratiometric pH sensing properties for monitoring enzyme catalytic reactions[J].Chemical Communications,2016,52:9247-9250.
[144]WANG S,COLE I S,ZHAO D,et al. The dual roles of functional groups in the photoluminescence of graphene quantum dots[J]. Nanoscale,2016,8:7449-7458.
[145]TANG L,JI R,CAO X,et al. Deep ultraviolet photoluminescence of water-soluble self-passivated graphene quantum dots[J]. ACS Nano,2012,6:5102-5110.
[146]KWON W,LIM J,LEE J,et al. Sulfur-incorporated carbon quantum dots with a strong long-wavelength absorption band[J]. Journal of Materials Chemistry C,2013,1:2002-2008.
[147]LI S,LI Y,CAO J,et al. Sulfur-doped graphene quantum dots as a novel fluorescent probe for highly selective and sensitive detection of Fe3+[J]. Analytical Chemistry,2014,86:10201-10207.
[148]KICIN'SKI W,SZALA M,BYSTRZEJEWSKI M. Sulfur-doped porous carbons:synthesis and applications[J]. Carbon,2014,68:1-32.
[149]QU D,ZHENG M,DU P,et al. Highly luminescent S,N co-doped graphene quantum dots with broad visible absorption bands for visible light photocatalysts[J]. Nanoscale,2013,5:12272-12277.
[150]KUNDU S,YADAV R M,NARAYANAN T,et al. Synthesis of N,F and S co-doped graphene quantum dots[J]. Nanoscale,2015,7:11515-11519.
[151]XU Q,KUANG T,LIU Y,et al. Heteroatom-doped carbon dots:synthesis,characterization,properties,photoluminescence mechanism and biological applications[J]. Journal of Materials Chemistry B,2016,4:7204-7219.
[152]QIAN Z,MA J,SHAN X,et al. Highly luminescent n-doped carbon quantum dots as an effective multifunctional fluorescence sensing platform[J]. Chemistry-A European Journal,2014,20:2254-2263.
[153]QU D,ZHENG M,ZHANG L,et al. Formation mechanism and optimization of highly luminescent n-doped graphene quantum dots[J]. Scientific Reports,2014,4:5294.
[154]CHANDRA S,PATRA P,PATHAN S H,et al. Luminescent S-doped carbon dots:an emergent architecture for multimodal applications[J].Journal of Materials Chemistry B,2013,1:2375-2382.
[155]XU Q,PU P,ZHAO J,et al. Preparation of highly photoluminescent sulfur-doped carbon dots for Fe(III)detection[J]. Journal of Materials Chemistry A,2015,3:542-546.
[156]LI D,JING P,SUN L,et al. Near-infrared excitation/emission and multiphoton-induced fluorescence of carbon dots[J]. Advanced Materials,2018,30:1705913.
[157]QIAN Z,SHAN X,CHAI L,et al. Si-doped carbon quantum dots:a facile and general preparation strategy,bioimaging application,and multifunctional sensor[J]. ACS Applied Materials&Interfaces,2014,6:6797-6805.
[158]ZHOU J,SHAN X,MA J,et al. Facile synthesis of P-doped carbon quantum dots with highly efficient photoluminescence[J]. RSC Advances,2014,4:5465-5468.
[159]LI Y,LIN H,LUO C,et al. Aggregation induced red shift emission of phosphorus doped carbon dots[J]. RSC Advances,2017,7:32225-32228.
[160]HAI X,MAO Q X,WANG W J,et al. An acid-free microwave approach to prepare highly luminescent boron-doped graphene quantum dots for cell imaging[J]. Journal of Materials Chemistry B,2015,3:9109-9114.
[161]DONG Y,PANG H,YANG H B,et al. Carbon-based dots co-doped with nitrogen and sulfur for high quantum yield and excitation-independent emission[J]. Angewandte Chemie International Edition,2013,52:7800-7804.
[162]LI L,DONG T. Photoluminescence tuning in carbon dots:surface passivation or/and functionalization,heteroatom doping[J]. Journal of Materials Chemistry C,2018,6:7944-7970.
[163]WANG M S,GUO G C. Inorganic-organic hybrid white light phosphors[J]. Chemical Communications,2016,52:13194-13204.
[164]MAO L H,TANG W Q,DENG Z Y,et al. Facile access to white fluorescent carbon dots toward light-emitting devices[J]. Industrial&Engineering Chemistry Research,2014,53:6417-6425.
[165]ZHAI Y,WANG Y,LI D,et al. Red carbon dots-based phosphors for white light-emitting diodes with color rendering index of 92[J]. Journal of Colloid and Interface Science,2018,528:281-288.
[166]YUAN B,GUAN S,SUN X,et al. Highly efficient carbon dots with reversibly switchable green-red emissions for trichromatic white light-emitting diodes[J]. ACS Applied Materials&Interfaces,2018,10:16005-16014.
[167]YUAN B,XIE Z,CHEN P,et al. Highly efficient carbon dots and their nanohybrids for trichromatic white leds[J]. Journal of Materials Chemistry C,2018,6:5957-5963.
[168]QIN X,LU W,ASIRI A M,et al. Microwave-assisted rapid green synthesis of photoluminescent carbon nanodots from flour and their applications for sensitive and selective detection of mercury(II)ions[J]. Sensors and Actuators B:Chemical,2013,184:156-162.
[169]ZHU P P,CHENG Z,DU L L,et al. Synthesis of the Cu-doped dual-emission fluorescent carbon dots and its analytical application[J]. Langmuir,2018,34:9982-9989.
[170]YAN F,BAI Z,CHEN Y,et al. Ratiometric fluorescent detection of copper ions using coumarin-functionalized carbon dots based on fret[J].Sensors and Actuators B:Chemical,2018,275:86-94.
[171]HE Y S,PAN C G,CAO H X,et al. Highly sensitive and selective dual-emission ratiometric fluorescence detection of dopamine based on carbon dots-gold nanoclusters hybrid[J]. Sensors and Actuators B:Chemical,2018,265:371-377.
[172]WANG Q,PANG H,DONG Y,et al. Colorimetric determination of glutathione by using a nanohybrid composed of manganese dioxide and carbon dots[J]. Microchimica Acta,2018,185:291.
[173]HUANG S,YANG E,LIU Y,et al. Low-temperature rapid synthesis of nitrogen and phosphorus dual-doped carbon dots for multicolor cellular imaging and hemoglobin probing in human blood[J]. Sensors and Actuators B:Chemical,2018,265:326-334.
[174]LI H,YAN X,QIAO S,et al. Yellow-emissive carbon dot-based optical sensing platforms:cell imaging and analytical applications for biocatalytic reactions[J]. ACS Applied Materials&Interfaces,2018,10:7737-7744.
[175]GONG X,ZHANG Q,GAO Y,et al. Phosphorus and nitrogen dual-doped hollow carbon dot as a nanocarrier for doxorubicin delivery and biological imaging[J]. ACS Applied Materials&Interfaces,2016,8:11288-11297.
[176]CHIZHIK A M,STEIN S,DEKALIUK M O,et al. Super-resolution optical fluctuation bio-imaging with dual-color carbon nanodots[J]. Nano Letters,2016,16:237-242.
[177]LEMENAGER G,DE LUCA E,SUN Y P,et al. Super-resolution fluorescence imaging of biocompatible carbon dots[J]. Nanoscale,2014,6:8617-8623.
[178]LIU Y,ZHOU L,LI Y,et al. Highly fluorescent nitrogen-doped carbon dots with excellent thermal and photo stability applied as invisible ink for loading important information and anti-counterfeiting[J]. Nanoscale,2017,9:491-496.
[179]JIANG K,WANG Y,CAI C,et al. Conversion of carbon dots from fluorescence to ultralong room-temperature phosphorescence by heating for security applications[J]. Advanced Materials,2018,30:1800783.
[180]KALYTCHUK S,WANG Y,POLAKOVA K,et al. Carbon dot fluorescence-lifetime-encoded anti-counterfeiting[J]. ACS Applied Materials&Interfaces,2018,10:29902-29908.