Synthesis and Self-Assembly of Gold Nanoparticles by Chemically Modified Polyol Methods under Experimental Control

被引:17
|
作者
Nguyen Viet Long [1 ,2 ,3 ,4 ]
Ohtaki, Michitaka [1 ]
Yuasa, Masayoshi [5 ]
Yoshida, Satoshi [1 ]
Kuragaki, Taiga [1 ]
Cao Minh Thi [6 ]
Nogami, Masayuki [3 ,7 ]
机构
[1] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan
[2] Posts & Telecommun Inst Technol, Dept Educ & Training, Hanoi, Vietnam
[3] Nagoya Inst Technol, Dept Mat Sci & Technol, Showa Ku, Nagoya, Aichi 4668555, Japan
[4] Ho Chi Minh Vietnam Natl Univ, Lab Nanotechnol, Ho Chi Minh City, Vietnam
[5] Kyushu Univ, Fac Engn Sci, Dept Mat Sci, Kasuga, Fukuoka 8168580, Japan
[6] Ho Chi Minh City Univ Technol, Ho Chi Minh City, Vietnam
[7] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China
关键词
SURFACE ATTACHMENT; NANOCRYSTALS; AGGREGATION;
D O I
10.1155/2013/793125
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In our present research, bottom-up self-assembly of gold (Au) nanoparticles on a flat copper (Cu) substrate is performed by a facile method. The very interesting evidence of self-assembly of Au nanoparticles on the top of the thin assembled layer was observed by scanning electron microscopy (SEM). We had discovered one of the most general and simple methods for the self-assembly of metal nanoparticles. The general physical and chemical mechanisms of the evaporation process of the solvents can be used for self-assembly of the as-prepared nanoparticles. The important roles of molecules of the used solvents are very critical to self-assembly of the as-prepared Au nanoparticles in the case without using any polymers for those processes. It is clear that self-assembly of such one nanosystem of the uniform Au nanoparticles is fully examined. Finally, an exciting surface plasmon resonance (SPR) phenomenon of the pure Au nanoparticles in the solvent was fully discovered in their exciting changes of the narrow and large SPR bands according to synthesis time. The SPR was considered as the collective oscillation of valence electrons of the surfaces of the pure Au nanoparticles in the solvent by incident ultraviolet-visible light. Then, the frequency of light photons matches the frequency of the oscillation of surface electrons of the Au nanoparticles that are excited.
引用
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页数:8
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