Fluorescence enhancement of semiconductor nanocrystals bylight-induced enhanced electric filed of metal nanoparticles

研究了金属纳米粒子增强电场对半导体纳米晶体荧光的增强作用。通过不同烷基链长度的二硫醇分子将半导体纳米晶固定在金或银纳米粒子固定的基底上，制备了金属/半导体纳米晶杂化材料。通过表征所得杂化物的光学性质，荧光强度通过使用银纳米颗粒增强，而在金/半导体杂化物中观察到荧光猝灭。

We investigated the fluorescence enhancement of semiconductor nanocrystals by enhanced electric field of metal nanoparticels. Metal/semiconductor nanocrystals hybrids were prepared by immobilization of semiconductor nanocrystals onto gold or silver nanoparticles-immobilized substrate through dithiol molecules with different length of alkyl chain. By characterization of optical properties of the resulting hybrids, fluorescence intensity enhanced by using silver nanoparticles, while fluorescence quench was observed at gold/semiconductor hybrids.