Strongly fluorescent hydrogels with quantum dots embedded in cellulose matrices

被引：142

作者：

Chang, Chunyu ^{[1
]}

Peng, Jun ^{[1
]}

Zhang, Lina ^{[1
]}

Pang, Dai-Wen ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2009年 / 19卷 / 41期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

RHEOLOGICAL CHARACTERIZATION; CDSE NANOCRYSTALS; POLYMER; NANOPARTICLES; TRANSPARENT; LUMINESCENT; DISSOLUTION; FABRICATION; COMPOSITES; INSIGHTS;

D O I：

10.1039/b908835k

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：

Hydrogels having strong fluorescence were fabricated successfully, for the first time, from cellulose and quantum dots (QDs) in a NaOH/urea aqueous system via a mild chemical cross-linking process. The CdSe/ZnS nanoparticles were embedded firmly in the cellulose matrices, as a result of strong interactions between the CdSe/ZnS nanoparticles and cellulose after hydrolysis of the QDs ligands. The results from FTIR spectra, transmission electron microscopy, scanning electron microscopy and photoluminescence (PL) spectra revealed that the cellulose networks in the hydrogels played an important role in the protection of the CdSe/ZnS structure and preservation of the quantum dots characteristics. The cellulose-QDs hydrogels exhibited strong PL emission and nearly pure color from green to red, depending on the size of the QDs. Moreover, the hybrid hydrogels possessed a good transparence and compressive strength. This work provides a new pathway for the construction of safe and biocompatible biopolymer-QDs hydrogels with a high efficiency of PL emission.

引用

页码：7771 / 7776

页数：6

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