激光诱导相分离制备圆盘状纳米结构
摘要
本文将脉冲激光液相烧蚀法和物质的相分离相结合,提出一种制备圆盘状纳米结构的新方法,成功制备出硅纳米圆盘和碳化硅纳米圆盘,并对纳米圆盘的形成机制做了相关研究,主要内容如下:
(1)利用脉冲激光液相辐照SiO粉末在去离子水中的悬浮液,研究了SiO在激光引起的极端非平衡条件下的相分离过程,成功制备出硅纳米圆盘;
(2)通过改变液相介质、激光脉宽、激光辐照时间和固相原料以及快速退火SiO粉等对比实验,确定了Si纳米圆盘是通过激光引起的固态相分离形成的;
(3)利用脉冲激光液相烧蚀SiOC非晶粉末在去离子水中的悬浮液,成功制备出碳化硅纳米圆盘,证实激光诱导固态相分离是一种制备纳米圆盘的普适方法。
In this thesis, a new route towards the synthesis of nanodisks was developed by combining the pulse-laser ablation in liquid with phase separation. Silicon nanodisks and silicon carbide nanodisks were synthesized and the formation mechanism of the nanodisks was investigated. The mian conclusions are as below:
(1) Silicon nanodisks were synthesized by pulsed laser irradiating the suspension of SiO powders in de-ionized water with magnetic stirring. The phase separation process of SiO under the extreme non-equilibrium conditions was investigated.
(2) A series of control experiments were conducted by varying liquid medium, laser pulse width, irradiation time and silicon-containning starting materials, a rapid thermal treatment of SiO powders was also performed, all of experimental results lend the support to a mechanism of solid state phase transformation in the low tempreture zone induced by laser radiation.
(3) SiC nanodisks were synthesized by pulsed-laser irradiating the suspension of the amorphous SiOC powders in de-ionized water with magnetic stirring. It was proved that the extreme non-equilibrium conditions created by pulse laser can be expanded to the synthesis of other nanodisks by phase separation.
(1)利用脉冲激光液相辐照SiO粉末在去离子水中的悬浮液,研究了SiO在激光引起的极端非平衡条件下的相分离过程,成功制备出硅纳米圆盘;
(2)通过改变液相介质、激光脉宽、激光辐照时间和固相原料以及快速退火SiO粉等对比实验,确定了Si纳米圆盘是通过激光引起的固态相分离形成的;
(3)利用脉冲激光液相烧蚀SiOC非晶粉末在去离子水中的悬浮液,成功制备出碳化硅纳米圆盘,证实激光诱导固态相分离是一种制备纳米圆盘的普适方法。
In this thesis, a new route towards the synthesis of nanodisks was developed by combining the pulse-laser ablation in liquid with phase separation. Silicon nanodisks and silicon carbide nanodisks were synthesized and the formation mechanism of the nanodisks was investigated. The mian conclusions are as below:
(1) Silicon nanodisks were synthesized by pulsed laser irradiating the suspension of SiO powders in de-ionized water with magnetic stirring. The phase separation process of SiO under the extreme non-equilibrium conditions was investigated.
(2) A series of control experiments were conducted by varying liquid medium, laser pulse width, irradiation time and silicon-containning starting materials, a rapid thermal treatment of SiO powders was also performed, all of experimental results lend the support to a mechanism of solid state phase transformation in the low tempreture zone induced by laser radiation.
(3) SiC nanodisks were synthesized by pulsed-laser irradiating the suspension of the amorphous SiOC powders in de-ionized water with magnetic stirring. It was proved that the extreme non-equilibrium conditions created by pulse laser can be expanded to the synthesis of other nanodisks by phase separation.
引文
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[4] Henglein A, Small-paricle Reseach: Physico-Chemical Properties of Excremely Small Colloidal Metal and Semiconductor Particles. Chem. Rev., 1989, 89, 1861
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[6] C. M. Lieber, Laser-Assisted Catalytic Growth of Single Crystal GaN Nanowires, J. Am. Chem. Soc. 2000, 122, 188.
[7] Wang X, Li Y D, Rational synthesis of alpha-MnO2 single-crystal nanorods, Chem. Common, 2002, 7: 764-765.
[8] Duan X F, C. M. Lieber, Gerneral synthesis of compound semiconductor nanowires, Adv Mater, 2000, 12(4): 298-302.
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[11] Alivisatos A P, Semiconductor clusters, nanocrystals, and quantum dots, Science, 1996, 271: 933.
[12] El-Sayed M A, Small Is Different: Shape-, Size-, and Composition-Dependent Properties of Some Colloidal Semiconductor Nanocrystals, Acc. Chem. Res. 2004, 37, 326.
[13] Puntes V F, Krishnan K M, Alivisatos A P, Colloidal Nanocrystal Shape and Size Control: The Case of Cobalt, Science, 2001, 291, 2115.
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[16] Chestnoy N, Hull R, Brus L E, Higher excited electronic states in clusters of ZnSe, CdSe and ZnS: Spin-orbit, vibronic, and relaxation phenomena, J. Chem. Phys. 1986, 85, 2237.
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[19] Cleveland C L, Luedtke W D, Landman U, Melting of gold clusters, Phys. Rev. B 1999, 60, 5065.
[20] Jun Y W, Choi J S, Cheon J W, Shape Control of Semiconductor and Metal Oxide Nanocrystals through Nonhydrolytic Colloidal Routes, Angew. Chem. Int. Ed. , 2006, 45, 3414,
[21] Hu J, Li L, Wang W, Manna L, Wang L and Alivisatos A P, Science 2001, 292, 2060
[22] Zhang J H, Liu H Y, Wang Z L, Ming N B, Li Z R and A. S. Biris, Polyvinylpyrrolidone - Directed Crystallization of ZnO with Tunable Morphology and Bandgap Adv. Funct. Mater. 2007, 17: 3897-3905.
[23] Lisiecki I , Pileni M P, Synthesis of copper metallic clusters using reverse micelles as microreactors , J. Am. Chem. Soc., 1993, 115: 3887-3896
[24] Lamarre J M, Billard F, Kerboua C H, Chahineze H K, Michel L, Sjoerd R, Ludvik M, Anisotropic nonlinear optical absorption of gold nanorods in a silica matrix, Optics Communications , 2008, 281: 331
[25] Jin R C, Cao Y W, Mirkin C A, Photoinduced Conversion of Silver Nanospheres to Nanopri sms, Science, 2001, 294: 1901-1903.
[26] Park J I, Kang N J, Jun Y, Oh S J, Ri H C and Cheon J, Superlattice and Magnetism Directed by the Size and Shape of Nanocrystals, Chem. Phys. Chem., 2002, 3: 543-547.
[27] Burda C, Chen X B, Narayanan R H, E-Sayed M A, Chemistry and Properties of Nanocrystals of Different Shapes, Chem. Rev. , 2005, 105, 1025-1102.
[28] Cordente N, Respaud M, Senocq, Casanove M J, Amiens C, Chaudret B, Synthesis and Magnetic Properties of Nickel Nanorods, Nano Letter , 2001, 1: 565-568.
[29] Pavesi L, Dal Negro L, Mazzoleni C, Optical gain in silicon nanocrystals, Nature 2000, 408: 440-444.
[30] Cui Y, Lieber C M, Functional Nanoscale Electronic Devices Assembled Using Silicon Nanowire Building Blocks, Science 2001, 291, 851-853.
[31] Chen Y W, Tang Y H, Pei L Z, Guo C, Self-Assembled Silicon Nanotubes Grown from Silicon Monoxide , Adv. Mater. 2005, 17 : 564-567.
[32] Kubota T, Hashimoto T, Ishikawa Y, Samukawa S, Miura A, Uraoka Y, T. Fuyuki, M. Takeguchi, K. Nishioka, I. Yamashita, Charging and Coulomb staircase effects in silicon nanodisk structures fabricated by defect-free Cl neutral beam etching process, Appl. Phys. Lett. , 2006, 89: 233127.
[33] Garcia-Santamaria F, Ibisate M, Rodriguez I, Meseguer F, Lopez C, Photonic Band Engineering in Opals by Growth of Si/Ge Multilayer Shells, Adv. Mater. 2003, 15: 788-792.
[34] Maillard Mathieu, Pinray Huang, Louis Brus, Silver Nanodisk growth by surface plamon enhanced photoreduction of adsorbed [Ag+], Nano Letter, 2003, 3: 1611-1615.
[35] Chen Sihai, Fan Zhiyong, David L, Carroll, Silver Nanodisks: Synthesis, Characterizati on, and Self-Assembly, J. Phys. Chem. B, 2002, 106:10777-10781
[36] Guo Yu Guo, Sook Lee Jong, Maier Joachim, Preparation and characterization of AgI nanoparticles with controlled size, morphology and crystal structure, Solid State Ionics , 2006, 177: 2467–2471.
[37] Lu Hongxia, Sun Hongwei, Mao Aixia, Yang Huizhi, Wang Hailong, Hu Xing, Preparation of plate-like nano-Al2O3 using nano-aluminum seeds by wet-chemical methods, Materials Science and Engineering A, 2005, 406: 19–23.
[38] Langhammer Christoph, Schwind Markus, Kasemo Bengt, Zoric Igor, Localized Surface Plasmon Resonances in Aluminum Nanodisks, Nano Lett, 2008, 8: 1461-1471.
[39] Simakin AV, Voronov V V, Shafeev GA, Brayner R, Bozon-Verduraz F, Nanodisks of Au and Ag produced by laser ablation in liquid environment,Chenmical Physics Letter, 2001, 348:182-186.
[40] Hao Encai, Lance Kelly K, Hupp Joseph T, Schatz George C, Synthesis of Silver Nanodisks Using Polystyrene Mesospheres as Templates, J. AM. CHEM. SOC., 2002, 124, 15182-15183.
[41] Vavassori P, Bonanni V, Busato A, Static and dynamical properties of circular NiFe/Cu/Co nanodisks, : JOURNAL OF APPLIED PHYSICS, 2008,103: 07C512
[42] Puntes Victor F, Kannan M Krishnan, Alivisatosl A Paul, Colloidal Nanocrystal Shape and Size Control: The Case of Cobalt, Science, 2001, 291: 2215-2217.
[43] Salzemann C, Urban J, Lisiecki I, Pileni M P, Characterization and Growth Process of Copper Nanodisks , Adv.Funt.Mater., 2005, 15: 1277-1284.
[44] Sun Y, Xia Y N , Triangular Nanoplates of Silver: Synthesis, Characterization, and Use as Sacrificial Templates For Generating Triangular Nanorings of Gold , Adv. Mater., 2003, 15: 695-699.
[45]Yoreo D J J,Dove P M, Shaping Crystals with Biomolecules, Science, 2004, 306:1301-1302.
[46]Mock J J,Barbic M,Smith D R, Shape effects in plasmon resonance of individual colloidal silver nanoparticles, J Chem Phys, 2002, ll6: 6755
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