Ag@SiO2SiC复合纳米颗粒制备及其荧光增强现象研究

刘晓萍a， 王丽娜b， 隋凝a*

（青岛科技大学 a.材料科学与工程学院；b.环境与安全工程学院，山东 青岛 266042）

摘要： 利用银纳米颗粒的表面等离子体共振来增强SiC的发光，成功制备了Ag@SiO2SiC复合纳米结构并进行了表征，通过控制二氧化硅层厚度和SiC连接方式研究了银纳米颗粒表面等离子体共振对荧光增强效果的影响。结果表明：采用氨基修饰后Ag@SiO2与SiC结合比未修饰氨基得到更强的荧光增强效果。当银纳米颗粒与SiC之间没有间隔时，产生荧光猝灭；当二氧化硅层厚度为10 nm时，荧光增强151倍；厚度为20 nm时荧光增强115倍。

关键词： 表面等离子体共振； SiC； 荧光增强

中图分类号： O 482.31              文献标志码： A

Preparation of Ag@SiO2SiC Composite Nanoparticles and Its Fluorescence Enhancement Phenomenon Research

LIU Xiaopinga,  WANG Linab,  SUI Ninga

(a.College of Materials Science and Engineering；b.College of Environment and Safety Engineering，

Qingdao University of Science and Technology，Qingdao 266042，China)

Abstract： Fluorescence of SiC was enhanced via silver surface plasmon resonance. Ag@SiO2SiC nanostructure was prepared, and several factors which effect the fluorescence enhancement were investigated, such as silica thickness, different binding type. The result shows aminomodified was more efficient than unmodified amino, 115fold and 151fold enhancement was obtained when the silica thickness was 20 nm and 10 nm, respectively. While there was no spacer distance, quenching occurred.

Key words: surface plasmon resonance; metal surface plamson; SiC; fluorescence enhancement

收稿日期： 20131017

基金项目： 国家自然科学基金项目（21301103）.

作者简介： 刘晓萍（1989—），女，硕士研究生.                   *通信联系人.