Scattering Imaging of Single Quantum Dots with Dark-Field Microscopy

被引:16
作者
Bu, Xiaobing [1 ]
Chen, Huaping [1 ]
Gai, Hongwei [1 ,2 ]
Yang, Ronghua [1 ,2 ]
Yeung, Edward S. [1 ,3 ,4 ]
机构
[1] Hunan Univ, Ctr Biomed Engn, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
[3] Iowa State Univ, Dept Chem, Ames, IA 50011 USA
[4] Iowa State Univ, Ames Lab, Ames, IA 50011 USA
关键词
LIGHT-SCATTERING; PLASMON RESONANCE; REFRACTIVE-INDEX; FLUORESCENCE; BLINKING; NANOPARTICLES; SUPPRESSION; INTERMITTENCY; NANOCRYSTALS; DEPENDENCE;
D O I
10.1021/ac901410w
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Scattering images of single quantum dots (QDs) are obtained with a standard dark-field microscope at a video rate. The counts of QDs under dark-field remained constant while the scattering intensity decreased, providing direct proof of quantum dot photophysical bleaching as opposed to desorption or photodecomposition.
引用
收藏
页码:7507 / 7509
页数:3
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