Fabrication of SiO2@Ag@SiO2 core-shell microspheres and thermal stability investigation

被引：11
|
作者：
Xiu, Zhiliang [1 ,2 ]
Wu, Yongzhong [1 ]
Hao, Xiaopeng [1 ]
Zhang, Lei [1 ]
机构：
[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[2] Shandong Polytech Univ, Shandong Prov Key Lab Proc & Testing Technol Glas, Jinan 250353, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2011年 / 386卷 / 1-3期
关键词：
Composite materials; Core-shell; Optical properties; Thermal stability; METAL NANOPARTICLES; HOLLOW SPHERES; NANOSHELLS; GOLD; SCATTERING;
D O I：
10.1016/j.colsurfa.2011.07.018
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：
Uniform, dense, and thickness controllable silver shells coated on mono-dispersed SiO2 microspheres were prepared by one-pot silver mirror reaction on the surface of Sn2+-sensitized colloidal SiO2 spheres. Different thickness of SiO2-encapsulating layer was fabricated by the hydrolysis of tetraethyl orthosilicate (TEOS) in isopropanol solution. The change of the Ag shell with the heating process could be reflected from the UV-vis absorption spectrum. The outer SiO2 layer provided greatly improved thermal stability of the Ag shell (20 nm) up to 300 degrees C. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：135 / 140
页数：6
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