Synthesis and characterization of water-soluble, stable and highly luminescent itaconic acid/methacrylic acid copolymer-coated CdSe/CdS quantum dots

被引：17

作者：

Wu, Zhanyu ^{[1
]}

Zhao, Yili ^{[1
]}

Qiu, Fangping ^{[2
]}

li, Yapeng ^{[1
]}

Wang, Shuwei ^{[1
]}

Zhang, Bao ^{[1
]}

Yang, Bohan ^{[1
]}

Zhang, Yefei ^{[3
]}

Gao, Ruotian ^{[3
]}

Wang, Jingyuan ^{[1
]}

机构：

[1] Jilin Univ, Alan G MacDiarmid Inst, Changchun 130023, Peoples R China

[2] Changchun Univ Technol, Sch Chem & Life Sci, Changchun 130012, Peoples R China

[3] Jilin Univ, Dept Mat Sci & Engn, Changchun 130023, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2009年 / 129卷 / 10期

关键词：

CdSe/CdS; PIA-MAA; Water-soluble; Ligand exchange; CDTE NANOCRYSTALS; CORE/SHELL NANOCRYSTALS; SIZE DISPERSION; PHOTOLUMINESCENCE; CDSE/ZNSE; LIGANDS; FILMS; CORE;

D O I：

10.1016/j.jlumin.2009.05.014

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The itaconic acid/methacrylic acid (PIA-MAA) copolymer ligand (PIA-MAA) with carboxylate anchoring groups was found to efficiently convert CdSe/CdS core-shell quantum dots (QDs) in chloroform to water-soluble PIA-MAA-ligand stabilized nanocrystals (PIA-MAA-QDs). The quantum yield (QY) of the resulting PIA-MAA-QDs was 24%. In addition, the carboxylate-based PIA-MAA-QDs survived UV irradiation in air for at least 16 days. Upon UV irradiation, the PIA-MAA-QDs became about 2 times brighter than the original CdSe/CdS QDs in chloroform, and the UV-brightened photoluminescence (PL) can retain the brightness for at least several months. Experimental results further confirmed that the PIA-MAA-QDs were more stable than the original CdSe/CdS QDs against strong acid, strong oxidant, photochemical and thermal treatments. The PIA-MAA-QDs were soluble and stable in water, some polar solvents and buffer solutions. in addition to good performance of PIA-MAA-QDs, the synthesis of PIA-MAA ligands and the corresponding water-soluble QDs is relatively simple. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1125 / 1131

页数：7

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