Recent Developments in Shape-Controlled Synthesis of Silver Nanocrystals

被引:164
|
作者
Xia, Xiaohu [1 ,2 ,3 ,4 ]
Zeng, Jie [5 ,6 ]
Zhang, Qiang [7 ]
Moran, Christine H. [1 ,2 ,3 ,4 ]
Xia, Younan [1 ,2 ,3 ,4 ]
机构
[1] Georgia Inst Technol, Wallace H Coulter Dept Biomed Engn, Atlanta, GA 30332 USA
[2] Emory Univ, Atlanta, GA 30332 USA
[3] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA
[4] Georgia Inst Technol, Sch Chem & Biomol Engn, Atlanta, GA 30332 USA
[5] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
[6] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Anhui, Peoples R China
[7] E China Normal Univ, Sch Life Sci, Shanghai 200241, Peoples R China
来源
JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 41期
基金
美国国家科学基金会;
关键词
SURFACE-PLASMON RESONANCE; SEED-MEDIATED SYNTHESIS; WET CHEMICAL SYNTHESIS; HIGH-ASPECT-RATIO; OPTICAL-PROPERTIES; METAL NANOCRYSTALS; POLY(VINYL PYRROLIDONE); QUANTITATIVE-ANALYSIS; CONCAVE SURFACES; AG NANOCUBES;
D O I
10.1021/jp306063p
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This feature article introduces our recent work on understanding the roles played by citrate and poly(vinyl pyrrolidone) (PVP) as capping agents in seed-mediated syntheses of Ag nanocrystals with controlled shapes. We have demonstrated that citrate and PVP selectively bind to Ag(111) and Ag(100) surfaces, respectively, and thus favor the formation of Ag nanocrystals enclosed preferentially by {111} or {100} facets. In addition, we have quantified the coverage density of PVP adsorbed on the surface of Ag nanocubes. On the basis of the mechanistic understanding, a series of Ag nanocrystals with controlled shapes and sizes have been successfully synthesized by using different combinations of seeds and capping agents: single-crystal spherical/cubic seeds with citrate for cuboctahedrons and octahedrons or with PVP for cubes and bars and plate-like seeds with citrate for enlarged thin plates or with PVP for thickened plates.
引用
收藏
页码:21647 / 21656
页数:10
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