Photoenhancement of lifetimes in CdSe/ZnS and CdTe quantum dot-dopamine conjugates

被引：46
|
作者：
Cooper, Daniel R. [1 ]
Suffern, Diana [2 ]
Carlini, Lina [1 ]
Clarke, Samuel J. [1 ]
Parbhoo, Rupesh [2 ]
Bradforth, Stephen E. [2 ]
Nadeau, Jay L. [1 ]
机构：
[1] McGill Univ, Dept Biomed Engn, Montreal, PQ H3A 2B4, Canada
[2] Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 21期
基金：
美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词：
PHOTOCHEMICAL INSTABILITY; PHOTODYNAMIC THERAPY; AQUEOUS-SOLUTION; LIVING CELLS; PHOTOLUMINESCENCE; LUMINESCENCE; ENHANCEMENT; WAVELENGTH; DEPENDENCE; OXIDATION;
D O I：
10.1039/b820602c
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The response of water-soluble, mercaptocarboxylic acid-capped fluorescent semiconductor nanoparticles, or quantum dots (QDs), to extended visible-light irradiation is variable and poorly described. Here we use time-resolved spectroscopy to investigate the photoluminescence intensities and lifetimes of CdSe/ZnS and CdTe QDs as a function of blue light illumination. Conjugates of the particles to the electron donor dopamine were also investigated, and the effect of the antioxidant beta-mercaptoethanol was explored. Both types of QD showed signs of direct electron transfer to the conjugate, but enhancement was much more pronounced in CdSe/ZnS. A model of the two different types of enhancement is proposed.
引用
收藏
页码：4298 / 4310
页数：13
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