激光与光电子学进展, 2017, 54 (5): 053004, 网络出版: 2017-05-03
氧气诱导单分子电子转移的动力学特性 下载: 568次
Oxygen-Induced Electron Transfer Dynamic Characteristics of Single Molecules
光谱学 单分子 氧气 电子转移 荧光闪烁 概率密度分布 spectroscopy single molecule oxygen electron transfer fluorescence blinking probability density distribution
摘要
通过测量单分子荧光亮态、暗态持续时间的概率密度统计特性, 研究了氧气含量对单分子电子转移动力学特性的影响。在富氧环境下,单分子荧光闪烁由离子态的电子布居引起, 呈现幂律分布; 在贫氧环境下,单分子荧光闪烁主要源于三重态的电子布居, 呈现指数截止型幂律分布; 在特定氧气环境下, 两种电子转移过程呈现明显的竞争效应, 部分单分子荧光闪烁服从幂律分布, 其余单分子荧光闪烁服从指数截止型幂律分布。
Abstract
By measuring the probability density statistical characteristics of the duration time of single molecules fluorescence at on-and off-states, the effect of oxygen concentration on electron transfer dynamic characteristic of single molecules is studied. In the oxygen-rich environment, the fluorescence blinking of single molecules is caused by the electron population of ionic state and presents a power-law distribution. In the oxygen-poor environment, the fluorescence blinking of single molecules mainly stems from the electron population of triplet state and presents an exponential truncated power-law distribution. In the oxygen-specific environment, two kinds of electron transfer processes show an apparent competition effect, where part fluorescence blinking of single molecules follows a power-law distribution while the other part follows an exponential truncated power-law distribution.
吴瑞祥, 陈瑞云, 乔志星, 高岩, 张国峰, 秦成兵, 肖连团, 贾锁堂. 氧气诱导单分子电子转移的动力学特性[J]. 激光与光电子学进展, 2017, 54(5): 053004. Wu Ruixiang, Chen Ruiyun, Qiao Zhixing, Gao Yan, Zhang Guofeng, Qin Chengbing, Xiao Liantuan, Jia Suotang. Oxygen-Induced Electron Transfer Dynamic Characteristics of Single Molecules[J]. Laser & Optoelectronics Progress, 2017, 54(5): 053004.