Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 135, Issue 1, Pages 63-67Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.04.016
Keywords
Chitosan-gold nanocomposites; Chitosan nanoparticles; Functional materials; Uv-vis spectroscopy
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Funding
- CNPq
- CAPES
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This work presents a novel and simple route for the synthesis of water-soluble core shell chitosan gold nanocomposites. The experimental procedure can be summarized by the following steps: (i) chitosan deacetylation, (ii) chitosan depolymerization, (iii) chitosan nanoparticles' formation and (iv) chitosan-gold nanocomposite formation. FT-IR spectroscopic results indicate that the formation of chitosan nanoparticles (ChtNPs) occurs via NH3+ and PO- groups electrostatic interactions, while UV-vis spectra points to a possible embedding of gold nanoparticles into the ChtNPs. This feature was confirmed by electronic transmission microscopy measurements. Chitosan and gold are biocompatible materials. Added to this, the obtained chitosan gold nanocomposites presented thermal and absorbance properties which strongly point to their potential use in phototherapeutic processes. (C) 2012 Elsevier B.V. All rights reserved.
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