自组装Ag纳米颗粒的表面等离子体共振及其对CdSe量子点的荧光增强效应

功能材料, 2011, 42(4): 771-774.

自组装Ag纳米颗粒的表面等离子体共振及其对CdSe量子点的荧光增强效应

刘玲 ^1, , 雷洁梅 ^2, , 刘艳松 ^3, , 杨周 ^4, , 许小亮 ^5,

1.中国科学技术大学,物理系,安徽,合肥,230026

2.中国科学技术大学,物理系,安徽,合肥,230026

3.中国科学技术大学,物理系,安徽,合肥,230026

4.中国科学技术大学,物理系,安徽,合肥,230026

5.中国科学技术大学,物理系,安徽,合肥,230026

基金项目: 国家自然科学基金资助项目(50872129)

关键词：表面等离子体共振 , Ag纳米颗粒 , 荧光增强

Surface plasmon resonance from self-assembled Ag nanoparticles and its enhanced CdSe emission

采用柠檬酸三钠还原硝酸银的方法制备了Ag纳米粒子溶胶,利用静电自组装技术制得单分散Ag纳米颗粒薄膜.研究了该Ag纳米颗粒薄膜的光学特性,通过改变反应物浓度和后期的热退火温度,有效调控了Ag纳米颗粒尺度和其在外场作用下产生的表面等离子体共振(SPR)特性.将所制备的Ag纳米颗粒薄膜与CdSe量子点耦合,利用SPR对荧光的增强效应,使CdSe量子点的光致发光强度增强达11倍.

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自组装Ag纳米颗粒的表面等离子体共振及其对CdSe量子点的荧光增强效应

Surface plasmon resonance from self-assembled Ag nanoparticles and its enhanced CdSe emission

参考文献