A NEW HYDROSOL OF GOLD CLUSTERS .1. FORMATION AND PARTICLE-SIZE VARIATION

被引：730

作者：

DUFF, DG

BAIKER, A

EDWARDS, PP

机构：

[1] SWISS FED INST TECHNOL, DEPT CHEM ENGN & IND CHEM, CH-8092 ZURICH, SWITZERLAND

[2] UNIV BIRMINGHAM, SCH CHEM, BIRMINGHAM B15 2TT, W MIDLANDS, ENGLAND

来源：

LANGMUIR | 1993年 / 9卷 / 09期

关键词：

D O I：

10.1021/la00033a010

中图分类号：

O6 [化学];

学科分类号：

0703 [化学];

摘要：

Aqueous reduction of hydrogen tetrachloroaurate(III) with alkaline tetrakis(hydroxymethyl) phosphonium chloride yields gold in an ultrafinely divided form as a stable colloidal hydrosol, with mean metal-cluster diameter between 1 and 2 nm, without the need for large organic stabilizing molecules. The ultraviolet-visible extinction spectrum is very similar to those of other gold colloids of similar dimensions and includes a weak plasmon feature. Dispersions with characteristics of yet finer clusters are prepared using lower initial concentrations of Au3+ ions. Boiling the sols in the presence of appropriate colloidal stabilizers (ionic and/or polymeric) is a route to coarser (3-10 nm particle diameter) gold hydrosols.

引用

页码：2301 / 2309

页数：9

共 68 条

[1]

[Anonymous], 1977, J PHYS-PARIS, V38, P97

[2]

IMAGE-PROCESSING ENHANCEMENT OF HIGH-RESOLUTION TEM MICROGRAPHS OF NANOMETER-SIZE METAL PARTICLES [J].