从单个CdSe/ZnS量子点到TiO2纳米颗粒的电子转移动力学。
Electron transfer dynamics from single CdSe/ZnS quantum dots to TiO2 nanoparticles.
作者信息
Jin Shengye, Lian Tianquan
机构信息
Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA.
出版信息
Nano Lett. 2009 Jun;9(6):2448-54. doi: 10.1021/nl9011744.
Electron-transfer dynamics from single CdSe/ZnS (core/shell) QDs to TiO(2) nanoparticles were studied. Single QDs on TiO(2) showed pronounced and correlated fluctuations of fluorescence intensity and lifetime. Compared to QDs on glass, the presence of the interparticle ET pathway on TiO(2) led to smaller on-state and larger off-state probability densities, as well as a shortened lifetime of the on-state. The average electron transfer rate from CdSe/ZnS to TiO(2) was estimated to be 3.2 x 10(7) s(-1).
研究了从单个CdSe/ZnS（核/壳）量子点到TiO(2)纳米颗粒的电子转移动力学。TiO(2)上的单个量子点表现出荧光强度和寿命的明显且相关的波动。与玻璃上的量子点相比，TiO(2)上粒子间电子转移途径的存在导致导通态概率密度较小、截止态概率密度较大，以及导通态寿命缩短。从CdSe/ZnS到TiO(2)的平均电子转移速率估计为3.2×10(7) s(-1)。
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