An ambience-induced optical absorption peak for Au/SiO2 mesoporous assembly

被引：11

作者：

Fu, GH ^{[1
]}

Cai, WP ^{[1
]}

Gan, YJ ^{[1
]}

Ha, JH ^{[1
]}

机构：

[1] Acad Sinica, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2004年 / 385卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.cplett.2003.12.062

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：

In this Letter, we report that a new optical absorption around 470 nm (varying from 465 to 475 nm) occurs for the gold nanoparticles/monolithic mesoporous silica assembly, after exposure to ambient air (aging) and subsequent drying at 120 degreesC. Ambient ageing for a certain time plays a crucial role in appearance of this peak after subsequent drying at 120 degreesC. This new peak may be associated with Au clusters with size less than 1.5 nm. A nanodroplet formation and evaporation model is presented, which can qualitatively explain all evolution behaviours of this peak under different treatment conditions (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：15 / 19

页数：5

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