Water vapour-induced enhancement of the surface plasmon resonance for Ag nanoparticles dispersed within pores of mesoporous silica

被引：7
|
作者：
Gan, YJ [1 ]
Cai, WP [1 ]
Fu, GH [1 ]
Hu, GL [1 ]
机构：
[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2004年 / 16卷 / 13期
关键词：
D O I：
10.1088/0953-8984/16/13/L05
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The optical evolution for monolithic mesoporous silica soaked in Ag+ ion solution (0.01-0.06 M) and annealed in air or water vapour is investigated. Heat treatment in air results in the absence of the surface plasmon resonance (SPR) peak of Ag nanoparticles. However, water vapour annealing induces a strong Ag SPR peak, exhibiting a strong reduction effect on Ag+ ions and an enhancement effect on the SPR absorption. The enhancement and weakening of the SPR can be controlled through annealing in water vapour and air alternately. This finding indicates the possibility that Ag nanoparticles dispersed in silica may be useful in optical sensors for humid environment use at high temperature.
引用
收藏
页码：L201 / L206
页数：6
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