Aerosol synthesis of nanoscale clusters using atmospheric arc evaporation

被引：27

作者：

Mahoney, W

Andres, RP

机构：

[1] School of Chemical Engineering, Purdue University, West Lafayette

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 204卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

aerosol synthesis; nanoscale clusters; arc evaporation;

D O I：

10.1016/0921-5093(95)09953-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A gas aggregation source that operates at atmospheric pressure and is capable of producing grams per hour of unaggregated, equiaxed metal clusters with diameters in the nanometer range is described. A controlled current d.c. are is employed to evaporate metal atoms from a liquid metal pool. These evaporated atoms are entrained in a flowing stream of inert gas and quickly transferred to a quench region where the hot stream from the are plasma is mixed with a second quench stream of cold inert gas. The quench gas provides rapid cooling and immediate dilution, both initiating cluster growth and suppressing cluster aggregation. Cluster size is controlled by varying the metal atom density and residence time in the are plasma, in the quench region and in the flow downstream from the quench region.

引用

页码：160 / 164

页数：5