| 界面电子转移对量子点荧光闪烁行为的影响 |
| |
| 引用本文： | 吴建芳,张国峰,陈瑞云,秦成兵,肖连团,贾锁堂.界面电子转移对量子点荧光闪烁行为的影响[J].物理学报,2014,63(16):167302-167302. |
| |
| 作者姓名： | 吴建芳 张国峰 陈瑞云 秦成兵 肖连团 贾锁堂 |
| |
| 作者单位： | 山西大学激光光谱研究所, 量子光学与光量子器件国家重点实验室, 太原 030006 |
| |
| 基金项目： | 国家重点基础研究发展计划(批准号:2012CB921603,2010CB923103);国家高技术研究发展计划(批准号:2011AA010801);国家自然科学基金(批准号:11374196,11174187,10934004,11204166);科学技术部国际科技合作计划(批准号:2001DFA12490);国家自然科学基金创新研究群体科学基金(批准号:61121064);教育部长江学者和创新团队发展计划(批准号:IRT13076);高等学校博士学科点专项科研基金(批准号:20121401120016)资助的课题~~ |
| |
| 摘 要： | 利用激光扫描共聚焦显微系统分别测量了CdSe/ZnS量子点在SiO2玻片表面、铟锡氧化物(ITO)纳米粒子表面和聚甲基丙烯酸甲酯(PMMA)薄膜表面上的荧光闪烁行为.研究发现,不同界面环境中量子点的亮态发光持续时间的概率密度都服从指数修正的幂律分布P(t)∝t-αexp(-t/μ).与处于SiO2玻片表面的情况相比,在ITO表面上的单量子点具有非常短暂的亮态发光持续时间,而在PMMA表面的单量子点亮态发光持续时间最长.这种荧光闪烁行为的不同主要归因于量子点与三种材料之间的界面电子转移特性.
|
| 关 键 词： | 量子点 荧光闪烁 界面电子转移 |
| 收稿时间： | 2014-01-24 |
Influence of interfacial electron transfer on fluorescence blinking of quantum dots |
| |
| Wu Jian-Fang,Zhang Guo-Feng,Chen Rui-Yun,Qin Cheng-Bin,Xiao Lian-Tuan,Jia Suo-Tang.Influence of interfacial electron transfer on fluorescence blinking of quantum dots[J].Acta Physica Sinica,2014,63(16):167302-167302. |
| |
| Authors: | Wu Jian-Fang Zhang Guo-Feng Chen Rui-Yun Qin Cheng-Bin Xiao Lian-Tuan Jia Suo-Tang |
| |
| Abstract: | The fluorescence blinking characteristics of the single CdSe/ZnS core/shell quantum dots (QDs) absorbed on the cover glass surface, indium-tin oxide (ITO) nanoparticles, and polymethyl methacrylate (PMMA) film surface are measured by a laser scanning confocal fluorescence microscopy. It is found that all the distributions of bright state duration time of QDs on the three different interfaces can be described by a truncated power law P(t)∝ t-αexp(-t/μ). The statistical on-time durations of single QDs absorbed on the ITO nanoparticles is shorter than on the glass. In addition, the on-time duration with single QDs absorbed on the PMMA is longer than on the others. These differences can be attributed to the diverse interfacial electron transfers between QD and different materials.
Keywords：
quantum dot
fluorescence blinking
interfacial electron transfer |
| |
| Keywords: | quantum dot fluorescence blinking interfacial electron transfer |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
| 点击此处可从《物理学报》下载免费的PDF全文 |
|
