Journal
MATERIALS LETTERS
Volume 64, Issue 5, Pages 614-617Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2009.12.019
Keywords
Selenium; Nanoparticles; L-cysteine; Nanomaterials; Amino acid
Funding
- National Natural Science Foundation of China [20771044, 20901030]
- Guangdong Science Foundation [2007B030703007, 2008A030201020, 9451063201002077]
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A simple and solution-phase approach for large-scale synthesis of selenium nanoparticles (Nano-Se) by reducing sodium selenite (Na2SeO3) with L-Cysteine has been demonstrated in this study. L-cysteine was used as both the reducing agent and surface modifier to control the formation of Nano-Se. The effects of reactant concentrations and ratios, and reaction time on the size and stability of Nano-Se were also investigated. The morphology and chemical composition of Nano-Se were characterized using various spectroscopic and microscopic methods. The results showed that varying the concentration ratio Of L-cysteine to Na2SeO3 could control the diameter and morphology of Nano-Se, but not affecting their crystalline phases and chemical compositions. Monodisperse and homogeneous spherical Nano-Se with an average diameter of about 100 nm could be synthesized with the concentration ratio Of L-cysteine to Na2SeO3 at 4:1. A striking feature of the as-synthesized Nano-Se was their good stability when dispersed in the reaction solutions, which indicates their potential in medical applications. (C) 2009 Elsevier B.V. All rights reserved.
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