自组装法制备Au纳米结构衬底及其表面增强荧光效应研究  

Study of surface enhanced fluorescence on the self-assembling Au nanostructured substrate

作　　者：董军[1] 刘继红[1] 严学文[1] 张稳稳[1] 张斌[1] 

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121

出　　处：《光电子．激光》2015年第6期1222-1225,共4页Journal of Optoelectronics·Laser

基　　金：国家"863"计划(2013AA014504);陕西省科技新星项目(2015KJXX-40);西安邮电大学"西邮新星"科研团队资助项目

摘　　要：采用自组装方法,在(APS)分子修饰后的玻璃衬底表面,制备得到Au纳米结构衬底。采取激光光谱学方法,研究所制备衬底对沉积其表面的Rhodamine 6G(Rh6G)分子的荧光辐射增强效应。实验发现,利用自组装方法制备的Au纳米结构衬底具有较强的荧光增强特性。理论分析表明,制备的Au纳米结构在外光场激发下,所形成的强局部电磁场分布能够有效提升探针分子的电子跃迁速率,从而实现增强荧光效应。Gold （Au） metallic nanostructures were fabricated by self-assembling gold nanoparticles （GNPs） on 3 Aminopropyltrimethoxysilane （APS） modified glass substrate. Surface enhanced fluorescence is studied for Rhodamine 6G molecules deposited on the fabricated suhstrates. The experimental results show that the prepared suhstrate presents strong fluorescence enhancement, and the enhanced factor is about 4. 2-fold with 532 nm excited laser beam. Higher intensity of local electric field and stronger coupling of surface plasmon resonance in gold nanostructure can enhance molecules more effectively. The results suggest that the current fabricated metallic substrate can enhance electron transition, and can produce good fluorescence enhancement.

关 键 词：自组装方法 Au纳米结构 表面增强荧光效应 

分 类 号：O433.3[机械工程—光学工程]