TiN纳米粒子增强CdSe/Al2O3异质结荧光的研究  

Enhanced Fluorescence of CdSe/AlO Heterojunctions Enabled by TiN Nanoparticles

作　　者：刘鹏程 昌梦雨 白忠臣[1,2] 秦水介 Liu Pengcheng;Chang Mengyu;Bai Zhongchen;Qin Shuijie(Guizhou Province Key Laboratory for Photoelectric Technology and Applications,Guizhou University,Guiyang,Guizhou 550025,China;College of Medicine,Guizhou University,Guiyang,Guizhou 550025,China)

机构地区：[1]贵州大学贵州省光电子技术及应用重点实验室,贵州贵阳550025 [2]贵州大学医学院,贵州贵阳550025

出　　处：《中国激光》2020年第9期357-364,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(61741505);贵州省科技支撑项目(QKHZ[2017]2887);中央引导地方科技发展专项(QKZYD[2017]4004);贵州省人才团队项目([2018]5616)。

摘　　要：利用TiN纳米粒子对CdSe量子点和多孔Al2O3薄膜构成的异质结的表面荧光增强效应进行了实验研究。采用电化学沉积的方法,将TiN纳米粒子沉积于多孔Al2O3薄膜表面,再将胶体CdSe量子点自组装于TiN/Al2O3薄膜的表面,进而制备了CdSe/TiN/Al2O3异质结。同时,利用扫描近场光学显微镜测量了CdSe/TiN/Al2O3异质结的表面增强荧光效应。结果表明,由于TiN具有良好的电子传输特性,提高了CdSe量子点和多孔Al2O3薄膜之间的光生电子转移效率,进而增强了多孔Al2O3薄膜界面的荧光。该研究结果可广泛应用于光伏、光显示、光传感及纳米生物成像等领域。The enhanced fluorescence effect of the heterojunction of CdSe quantum dots and a porous Al2O3 film was experimentally studied by using TiN nanoparticles(NPs). TiN NPs were deposited on the surface of porous Al2O3 film. Then, the CdSe QDs were self-assembled on the surface of TiN/Al2O3 film to prepare the CdSe/TiN/Al2O3 heterojunction. At the same time, the surface enhanced fluorescence effect was observed on the platform of a scanning near-field optical microscope. The results have showed that the interfacial fluorescence from the porous Al2O3 film was enhanced due to the increase of poto-generated carriers resulted in by TiN Nps from the CdSe QDs to the porous Al2O3 film. These results based on this paper could be widely applied for many fields of photovoltaic, lightshows, optical sensors devices and nano-biological imaging system.

关 键 词：表面光学 表面增强荧光 CdSe/Al2O3异质结 TiN纳米粒子 CDSE量子点 扫描近场光学显微镜 

分 类 号：O432[机械工程—光学工程]