Thermosensitive, reversible luminescence properties and bright fluorescence imaging of water-soluble quantum dots/microgels nanocompounds

被引：16

作者：

Gui, Rijun ^{[1
]}

An, Xueqin ^{[1
]}

Gong, Jun ^{[1
]}

Chen, Tao ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Dept Phys Chem, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

来源：

MATERIALS LETTERS | 2012年 / 88卷

基金：

中国国家自然科学基金;

关键词：

Quantum dots; Luminescence; Nanocompounds; Sol-gel preparation; Fluorescence imaging; POLYMER MICROSPHERES; DRUG-DELIVERY; DOTS; MICROGELS; NANOCRYSTALS; NANOGELS;

D O I：

10.1016/j.matlet.2012.08.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

At room temperature, the self-assembly of CdTe/ZnS quantum dots (QDs)/poly(N-isopropylmethacylamide-co- methylacrylic acid) [QDs/P(NIPAM-MAA)] hybrid microgels were achieved. The temperature-dependent swelling and shrinking behavior of polymer microgels played an important role in the photoluminescence (PL) changes of hybrid microgels. At 25 degrees C, polyethylenimine modified-QDs and P(NIPAM-MAA) microgels (at the swelling state) were combined by electrostatic attraction to form nanocompounds. At 45 degrees C, nanocompounds' shrinking triggered strong scattering centers, together with marked PL decrease. Almost whole reversible PL changes were observed between 25 degrees C and 45 degrees C after repeated heating-cooling cycles. In addition, the nanocompounds exhibited well monodisperse spheres and bright PL imaging, the average diameter was found to be approximately 300 nm. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.

引用

页码：122 / 125

页数：4

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