手性等离激元纳米晶制备技术的研究进展
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摘要
生命体中大部分生物分子都具有手性。生物分子的手性构象与等离激元纳米晶的局域表面等离激元共振(LSPR)通过偶极子-偶极子耦合作用,在其LSPR的位置会诱导出一个新的圆二色吸收光谱,具有这种光学活性的等离激元纳米晶称为手性等离激元纳米晶。手性等离激元纳米晶的光学响应信号的稳定性和可重复性都比较高,广泛应用在生物传感、化学传感、圆偏振器、光催化、癌症治疗等领域。手性等离激元纳米晶的制备技术一直是该领域的研究热点。然而,通过将手性分子直接吸附在等离激元纳米晶表面的方式所诱导的手性光学响应信号非常弱,故本综述聚焦于手性等离激元纳米晶的其他制备技术,包括通过手性分子或者软模板组装技术获得手性等离激元超结构;湿化学法将手性分子嵌入到单个纳米晶当中制备出核-壳型手性等离激元纳米晶,或者将手性分子的手性构象传递到无机纳米材料的结构当中制备出单个螺旋型手性等离激元纳米晶等。基于目前对手性等离激元纳米晶的最新研究进展,对其纳米制备技术作了进一步的总结和展望。
Most of the biomolecules in living organisms are chiral. The chiral conformation of biomolecules can be transferred to plasmonic nanocrystals via coupling with its localized surface plasmon resonance(LSPR),inducing a new circular dichroic peak at the LSPR position of plasmonic nanocrystals. In this review,chiral plasmonic nanocrystal is defined as they can possess the chiroptical activity. Because of its high stability and reproducible chiroptical response signal,chiral plasmonic nanocrystals have attracted great attention from basic science to applications. So far,synthesis of chiral plasmonic nanocrystals have always been hot topic in the numerous fields,such as,bio-/chemical sensing,circular polarizers,photocatalysis,cancer treatment,etc. In this review,chiral molecules on the surface of plasmonic nanocrystals inducing chiroptical response are not discussed because their weak coupling strength leads to weak chiroptical activity. We will focus on the recent fabrication technologies of chiral plasmonic nanocrystals,including(i) self-assembly of achiral plasmonic nanocrystals by chiral molecules or soft templates;(ii) chiral molecules encapsulation into a single nanocrystal is to make core-shell chiral plasmonic nanocrystal;(iii) chiral conformation of chiral molecules transferring to the structure of plasmonic nanocrystals is to fabricate a single helical chiral plasmonic nanocrystal. Finally,we have summarized and prospected the synthetic nanotechnology of chiral plasmonic nanocrystals based on the recent research achievements.
Most of the biomolecules in living organisms are chiral. The chiral conformation of biomolecules can be transferred to plasmonic nanocrystals via coupling with its localized surface plasmon resonance(LSPR),inducing a new circular dichroic peak at the LSPR position of plasmonic nanocrystals. In this review,chiral plasmonic nanocrystal is defined as they can possess the chiroptical activity. Because of its high stability and reproducible chiroptical response signal,chiral plasmonic nanocrystals have attracted great attention from basic science to applications. So far,synthesis of chiral plasmonic nanocrystals have always been hot topic in the numerous fields,such as,bio-/chemical sensing,circular polarizers,photocatalysis,cancer treatment,etc. In this review,chiral molecules on the surface of plasmonic nanocrystals inducing chiroptical response are not discussed because their weak coupling strength leads to weak chiroptical activity. We will focus on the recent fabrication technologies of chiral plasmonic nanocrystals,including(i) self-assembly of achiral plasmonic nanocrystals by chiral molecules or soft templates;(ii) chiral molecules encapsulation into a single nanocrystal is to make core-shell chiral plasmonic nanocrystal;(iii) chiral conformation of chiral molecules transferring to the structure of plasmonic nanocrystals is to fabricate a single helical chiral plasmonic nanocrystal. Finally,we have summarized and prospected the synthetic nanotechnology of chiral plasmonic nanocrystals based on the recent research achievements.
引文
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[3] Zheng G C,Wang J,Kong L T,et al. Cellular-like gold nanofeet:synthesis,functionalization,and surface enhanced fluorescence detection for mercury contaminations[J]. Plasmonics,2012,7:487.
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[11]王翔，黄声超，张檬，等．表面等离激元辅助反应及其表征研究进展[J]．光散射学报，2018,30:297-307(WANG Xiang,HUANG Shengchao,ZHANG Meng. The advance for the field of surface plasmon assisted reactions and related characterization[J]. J Light Scattering,2018,30:297)
[12]陈诚，解启文，黄方志，等．金纳米棒调控组装结构SERS基底用于构筑毒品检测模块[J]．光散射学报，2018,30:17(CHEN Cheng,XIE Qiwen,HUANG Fangzhi. Regulatory assembly of gold nanorods SERS substrates for fabrication of drug detection module[J].J Light Scattering,2018,30:17)
[13]张佳，牧凯军，王俊俏，等．等离子体纳米结构中的Fano共振效应及其应用[J]．光散射学报，2017,29:1-7(ZHANG Jia,MU Kaijun,WANG Junqiao. Fano resonance in plasmonic nanostructures and its applications[J]. J Light Scattering,2017,29:1)
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[16] Jiang S,Chekini M,Qu Z B,et al. Chiral ceramic nanoparticles and peptide catalysis[J]. J Am Chem Soc,2017,139:13701.
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[18] Ma W,Xu L G,De Moura A F,et al. Chiral inorganic nanostructures[J]. Chem Rev 2017,117:8041.
[19] Wu X L,Hao C L,Kumar J,et al. Environmentally responsive plasmonic nanoassemblies for biosensing[J].Chem Soc Rev,2018,47:4677.
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[23] Lu J,Chang Y X,Zhang N N,et al. Chiral plasmonic nanochains via the self-Assembly of gold nanorods and helical glutathione oligomers facilitated by cetyltrimethylammonium bromide micelles[J]. Acs Nano 2017,11:3463.
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[25] Wang X A,Tang Z Y. Circular dichroism studies on plasmonic nanostructures[J]. Small,2017,13:1601115.
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[29] Hentschel M,Schaferling M,Duan X Y,et al. Chiral plasmonics[J]. Sci Adv,2017,3:e1602735.
[30] Tian X R,Fang Yr,Sun M T. Formation of enhanced uniform chiral fields in symemetric dimer nanostructures[J]. SCI REP,2015,5:17534.
[31] Grzelczak M,Perez-Juste J,Mulvaney P,et al. Shape control in gold nanoparticle synthesis[J]. Chem Soc Rev,2008,37:1783.
[32] Pastoriza-Santos I,Kinnear C,Perez-Juste,et al. Plasmonic polymer nanocomposites[J]. Nat Rev Mater,2018,3:375.
[33] Xu L G,Gao Y F,Kuang H,et al. MicroRNA-directed intracellular self-assembly of chiral nanorod dimers[J]. Angew Chem Int Edit,2018,57:10544.
[34] Wu X L,Xu L G,Liu L Q,et al. Unexpected chirality of nanoparticle dimers and ultrasensitive chiroplasmonic bioanalysis[J]. J Am Chem Soc,2013,135:18629.
[35] Zhao Y,Xu L G,Ma W,et al. Shell-engineered chiroplasmonic assemblies of nanoparticles for zeptomolar DNA detection[J]. Nano Lett,2014,14:3908.
[36] Gao F L,Sun M Z,Ma W,et al. Singlet oxygen generating agent by chirality-dependent plasmonic shell-satellite nanoassembly[J]. Adv Mater,2017,29:1606864.
[37] Zhu Z N,Liu W J,Li Z T,et al. Manipulation of collective optical activity in one-dimensional plasmonic assembly[J]. Acs Nano,2012,6:2326.
[38] Funck T,Nicoli F,Kuzyk A,et al. Sensing picomolar concentrations of RNA using switchable plasmonic chirality[J]. Angew Chem Int Edit,2018,57:13495.
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