Sculpturing effect of chloride ions in shape transformation from triangular to discal silver nanoplates

被引：184

作者：

An, Jing ^{[1
]}

Tang, Bin ^{[1
]}

Zheng, Xianliang ^{[1
]}

Zhou, Ji ^{[1
]}

Dong, Fengxia ^{[1
]}

Xu, Shuping ^{[1
]}

Wang, Ye ^{[1
]}

Zhao, Bing ^{[1
]}

Xu, Weiqing ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 39期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1021/jp802694p

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：

The sculpturing effect of chloride ions on the shape transformation of silver nanoparticles is presented. UV-vis spectroscopy and transmission electron microscopy (TEM) were used to monitor the evolution of silver nanoplates. Cl- can etch the corners and side faces of the silver nanoprism, and the resulting nanoparticles are disk-like in shape. The dissolved silver atoms would aggregate to form small silver clusters, which were stabilized by the Cl- and citrate ions. The facet-selective etching effect of Cl- is mainly attributed to the surface energy difference of each face of the nanoplate. The thickness of the nanodisk increased during the etching process because of the redeposition of sliver clusters on the {111} planes. The prepared nanodisk also gave rise to high SERS intensity of the probing molecule.

引用

页码：15176 / 15182

页数：7

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