The reactivity study of peptide A3-capped gold and silver nanoparticles with heavy metal ions

被引：13

作者：

Yang, Hongyu ^{[1
]}

Tang, Zhenghua ^{[1
,2
]}

Wang, Likai ^{[1
]}

Zhou, Weijia ^{[1
]}

Li, Ligui ^{[1
]}

Zhang, Yongqing ^{[2
]}

Chen, Shaowei ^{[1
,3
]}

机构：

[1] South China Univ Technol, Guangzhou Higher Educ Mega Ctr, New Energy Res Inst, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China

[2] South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Sch Environm & Energy, Guangdong Prov Key Lab Atmospher Environm & Pollu, Guangzhou 510006, Guangdong, Peoples R China

[3] Univ Calif Santa Cruz, Dept Chem & Biochem, 1156 High St, Santa Cruz, CA 95054 USA

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2016年 / 210卷

基金：

中国国家自然科学基金;

关键词：

Peptide A3; Nanoparticle; Aggregation; Reaction; Heavy metal ions; SUPERSTRUCTURES; NANOCLUSTERS; SPECTROSCOPY; ABSORPTION; HG2+; AU; DYNAMICS; SENSORS; DESIGN; WATER;

D O I：

10.1016/j.mseb.2016.04.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Peptide A3-capped gold and silver nanoparticles were prepared by chemical reduction of metal salt precursors. The nanoparticles exhibited apparent but distinctly different color changes upon the addition of selected heavy metal ions. For gold nanoparticles, the solution color was found to change from red to blue in the presence of Hg2+ or As3+ ions, accompanied with broadening and a red-shift of the surface plasmon resonance peak. In contrast, silver nanoparticles showed an apparent color change from to colorless only in the presence of Hg2+, along with a blue-shift and diminishment of the surface plasmon resonance peak. The Hg2+ reaction concentration limit of silver nanoparticle was about 40 times lower than that of gold nanoparticle. Based on the dynamic light scattering, transmission electron microscopy and X-ray photoelectron spectroscopic results, the reaction mechanism has been proposed. Such a sensitive variation of the nanoparticle optical properties to selective ions might be exploited for ion detection for potential applications. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：37 / 42

页数：6

共 34 条

[1] Optical absorption spectra of nanocrystal gold molecules [J].