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

被引：45

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：

加拿大自然科学与工程研究理事会; 美国国家科学基金会;

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

页码：4298 / 4310

页数：13

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