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Optical Properties of Water-Soluble CdTe Quantum Dots Passivated by a Biopolymer Based on Poly((2-dimethylaminoethyl) methacrylate) Grafted onto κ-Carrageenan

Author:
Rezanejade Bardajee, Ghasem, Hooshyar, Zari, Rezanezhad, Habib, Guerin, Gerald
Source:
ACS Applied Materials & Interfaces 2012 v.4 no.7 pp. 3517-3525
ISSN:
1944-8252
Subject:
Fourier transform infrared spectroscopy, antibacterial properties, biocompatibility, biopolymers, cytotoxicity, fluorescence, kappa carrageenan, optical properties, quantum dots, temperature, thermogravimetry, transmission electron microscopy
Abstract:
Poly ((2-dimethylaminoethyl) methacrylate) grafted onto κ-carrageenan (κC-g-PDMA) as a biopolymer was synthesized and applied for surface modification of water-soluble CdTe quantum dots (QDs). The effects of DMA concentration, molar ratio of κC-g-PDMA/CdTe, reaction temperature and time on optical properties of CdTe QDs were investigated via fluorescent (FL) and UV- visible spectra. The results showed that the κC-g-PDMA significantly affects the optical properties of CdTe QDs. The obtained samples were characterized by Fourier transform infrared spectrum (FT-IR), thermogravimetric (TG) analysis, and transmission electron microscopy (TEM). The antibacterial activity, antifungal assays, and cytotoxicity of modified QDs were examined, and a good biocompatibility was observed.
Agid:
5274108