Fabrication and optical properties of thin silica-coated CdSe/ZnS quantum dots

被引：7

作者：

Sun, Ye ^{[1
]}

Masia, Francesco ^{[2
]}

Langbein, Wolfgang ^{[2
]}

Borri, Paola ^{[1
]}

机构：

[1] Cardiff Univ, Sch Biosci, Cardiff CF10 3US, S Glam, Wales

[2] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2009年 / 206卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

REVERSE MICROEMULSION METHOD; SPHERES; ROBUST;

D O I：

10.1002/pssa.200925250

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We demonstrate the fabrication of thin silica-coated CdSe/ZnS colloidal quantum dots using a reverse microemulsion method. Spherical particles of <20 nm diameter with a single dot in the centre of a thin silica shell of good morphology are achieved, promising for biophotonic applications where hydrophilic bio-compatible and small luminescent nanoparticles are needed. We characterize the spectrally- and time-resolved photoluminescence of these silica-coated dots, from which we identify the influence of each step of the coating procedure on their emission quantum yield. Optimization of the growth parameters eventually results in a less than two-fold reduction of the quantum yield after silica-coating. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：2822 / 2825

页数：4

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