期刊
CARBOHYDRATE POLYMERS
卷 145, 期 -, 页码 13-19出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.03.016
关键词
Biobased materials; CdTe quantum dots; Montmorillonite-chitosan nanosheets; Fluorescence; Nanocomposites
资金
- K.C. Wong Education Foundation
- Youth Innovation Promotion Association of CAS
- Qingdao Institute of Bioenergy and Bioprocess Technology Director Technology Foundation
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar, China [JQ201305]
- CAS-TWAS President's PhD Fellowship programme of K.S [2013A8017908241]
A method was presented for fabricating the fluorescent nanocomposites containing CdTe quantum dots (QDs) and montmorillonite (MMT)-chitosan (CS). MMT-CS/CdTe QDs nanocomposites were prepared via a simple, versatile and robust approach combination of covalent and electrostatic assembly methods (Scheme 1). The negatively charged MMT was initially modified with positively charged CS through electrostatic assembly, followed by incorporation of CdTe-QDs into the MMT-CS nanosheets by covalent connections between the amino groups of CS and the carboxylic acid groups of thioglycollic acid (TGA). The X-ray diffraction (XRD), High resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and the FTIR were used to prove the QDs have intercalated into the MMT-CS matrix. The fluorescence emission spectra showed that the MMT-CS/CdTe QDs nanocomposites had the best fluorescence intensity compared with the bare CdTe QDs and CS-QDs. (C) 2016 Elsevier Ltd. All rights reserved.
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