期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 19, 期 41, 页码 7771-7776出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b908835k
关键词
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资金
- National Basic Research Program of China [2006CB933100, 2010CB732203]
- National Supporting Project for Science and Technology [2006BAF02A09]
- National High Technology Research and Development Program of China [2003AA333040]
- National Natural Science Foundation of China [30530850, 59933070, 20874079]
- Science Fund for Creative Research Groups of NSFC [20621502]
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.
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