Confocal Laser Imaging and Annealing of Quantum-Dot-Coated Silica Colloidal Crystals

被引：4

作者：

Beckham, Richard E. ^{[2
]}

Bevan, Michael A. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Baltimore, MD 21218 USA

[2] Texas A&M Univ, College Stn, TX 77843 USA

来源：

LANGMUIR | 2010年 / 26卷 / 06期

基金：

美国国家科学基金会;

关键词：

BIOLOGICAL DETECTION; PHASE-TRANSITIONS; SPHERES; NANOCRYSTALS; CDSE; DISPERSIONS; MICROSCOPY; SIZE;

D O I：

10.1021/la904031s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate the ability to image, melt, and anneal repulsive electrostatic and attractive depletion colloidal crystals of quantum-dot-decorated SiO2 microparticles (QDSs). QDS colloidal crystals showed increased thermal motion, melting, and convection only in the presence of CSLM imaging, which we attribute to quantum dot (QD) heating. We exploit this local heating effect to anneal a single defect-rich, polycrystalline domain. Our results demonstrate a method to anneal colloidal crystals locally with focused lasers and the role of heating when using many QD tags per particle in CSLM imaging.

引用

收藏

页码：3779 / 3782

页数：4

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