Ag and au monometallic and bimetallic colloids: Morphogenesis in amphiphilic block copolymer solutions

被引：80
|
作者：
Sakai, Toshio [1 ]
Alexandridis, Paschalis [1 ]
机构：
[1] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA
来源：
CHEMISTRY OF MATERIALS | 2006年 / 18卷 / 10期
关键词：
D O I：
10.1021/cm051757y
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：
We report here a facile synthesis of Ag colloids with various morphologies (e. g., spherical nanoparticles, plates, wires) through autoreduction of silver nitrate (AgNO3) in formamide solutions containing poly(ethylene oxide)-poly(propylene oxide) (PEO-PPO) block copolymers at similar to 100 degrees C. The PEO-PPO amphiphilic block copolymers act in tandem as reducing, stabilizing, and morphogenic agents. Judicious selection of conditions leads to spherical Au-Ag core-shell nanoparticles or Ag-Au bimetallic nanonetworks (e.g., spherical Au or Ag nanoparticles connected by Ag or Au nanowires, respectively) that are generated in the same solution ("one pot") without additional agents and/or energy input.
引用
收藏
页码：2577 / 2583
页数：7
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