A rapid, straight-forward method for controlling the morphology of stable silver nanoparticles

被引：148

作者：

Ledwith, Deirdre M. ^{[1
]}

Whelan, Aine M. ^{[1
]}

Kelly, John M. ^{[1
]}

机构：

[1] Univ Dublin Trinity Coll, Sch Chem, Dublin 2, Ireland

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2007年 / 17卷 / 23期

关键词：

SHAPE-CONTROLLED SYNTHESIS; SURFACE-PLASMON RESONANCE; ENHANCED RAMAN-SCATTERING; FLUORESCENCE ENHANCEMENT; METAL NANOSTRUCTURES; GROWTH-MECHANISM; NANOWIRES; NANORODS; GOLD; NANOPRISMS;

D O I：

10.1039/b702141k

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：

A rapid, straight-forward method for the preparation of silver colloidal solutions of various colours has been developed. This is based on the reduction of silver ions by ascorbic acid in the presence of citrate-stabilized silver seeds, additional trisodium citrate and a polymer such as polyvinylpyrrolidone. The colour of the sol is controlled by varying the concentration of only one reagent, namely the trisodium citrate. TEM studies show that this effect is due to changes in morphology of the particles. Working at temperatures above 50 degrees C yields well-defined triangular plates, which are stable in the reaction medium. Samples prepared at lower temperatures and left in the reaction medium experience etching and a consequent change in particle shape. The mechanisms of the initial particle growth and the etching process are discussed.

引用

页码：2459 / 2464

页数：6

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