Effect of pH on the single-step synthesis of gold nanoparticles using PEO-PPO-PEO triblock copolymers in aqueous media

被引：33
作者：
Shou, Qinghui [1 ]
Guo, Chen [1 ]
Yang, Liangrong [1 ]
Jia, Lianwei [1 ]
Liu, Chunzhao [1 ]
Liu, Huizhou [1 ]
机构：
[1] Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2011年 / 363卷 / 02期
基金：
北京市自然科学基金; 中国国家自然科学基金;
关键词：
Gold; Nanoparticles; Pluronic; Block copolymers; pH value; METAL NANOPARTICLES; BLOCK-COPOLYMERS; SIZE CONTROL; POLYMER; STABILIZATION; PARTICLES; NANOCRYSTALS; MORPHOLOGIES; AGGREGATION; TEMPERATURE;
D O I：
10.1016/j.jcis.2011.07.021
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 influence of pH value on gold nanoparticle production in the presence of Pluronic stabilizers is systematically investigated. The reactions are studied as a function of pH and at fixed concentrations of the two reactants, HAuCl4 and P123 block copolymer. Results indicate that the reaction pathway during the nanoparticle formation can be controlled by varying pH. The nanoparticles synthesized at pH = 11.12 have an average diameter of 9.6 nm with a narrow size distribution, and the Pluronics are adsorbed on individual gold particle surfaces to form core-shell structures via hydrophobic interactions. The present work provides an economic way to improve the dispersion and stabilization of gold nanopartides and throws further light on the understanding of gold nanoparticle production using block copolymers. (C) 2011 Elsevier Inc. All rights reserved.
引用
收藏
页码：481 / 489
页数：9
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