Synthesis and pH dependent optical properties of gold nanoparticles capped with mercaptopropionic acid

被引：12

作者：

Liu, ST ^{[1
]}

Zhu, T ^{[1
]}

Wang, YC ^{[1
]}

Liu, ZF ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, Ctr Nanoscale Sci & Technol, Beijing 100871, Peoples R China

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1999年 / 337卷

基金：

中国国家自然科学基金;

关键词：

gold nanoparticles; mercaptopropionic acid; HRTEM; UV-visible spectroscopy;

D O I：

10.1080/10587259908023423

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A simple method is reported for preparing gold nanoparticles capped with 3-mercaptopropionic acid(MPA). The capped Au nanoparticles can be isolated as a dark brown solid which can be re-dispersed in sodium hydrate solution. The average size of nanoparticles is 4.9+/-0.7 nm, determined by HRTEM. The surface plasmon band of Au nanoparticles around 520nm was found red-shifted together with a slight damping and broadening, as the pH of the colloid is adjusted from 11 to 3.5. Such a shift is attributed to the pH dependent surface charge of the nanoparticles.

引用

页码：245 / 248

页数：4

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