Chemical- or radiation-assisted selective dealloying in bimetallic nanoclusters

被引：59
|
作者：
Mattei, G
Marchi, GD
Maurizio, C
Mazzoldi, P
Sada, C
Bello, V
Battaglin, G
机构：
[1] Univ Padua, Dipartimento Fis, INFM, I-35131 Padua, Italy
[2] Univ Venice, Dipartimento Chim Fis, INFM, I-30123 Venice, Italy
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.90.085502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A selective dealloying in bimetallic nanoclusters prepared by ion implantation has been found upon thermal annealing in oxidizing atmosphere or irradiation with light ions. In the first process, the incoming oxygen interacts preferentially with copper promoting Cu(2)O formation, therefore extracting copper from the alloy. In the second process the irradiation with Ne ions promotes a preferential extraction of Au from the alloy, resulting in the formation of Au-enriched "satellite" nanoparticles around the original Au(x)Cu(1-x) cluster.
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页数：4
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