Ag@SiO_2-SiC复合纳米颗粒制备及其荧光增强现象研究

Preparation of Ag@SiO_2-SiC Composite Nanoparticles and Its Fluorescence Enhancement Phenomenon Research

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10nm时,荧光增强1.51倍;厚度为20nm时荧光增强1.15倍。

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 and1.51-fold enhancement was obtained when the silica thickness was 20 nm and 10 nm,respectively.While there was no spacer distance,quenching occurred.