Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 162, Issue 3, Pages 155-158Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2011.06.019
Keywords
Gold nanoparticle; Surface plasmon resonance; Microwave assisted synthesis; DLS
Funding
- Department of Chemistry, University of Kerala
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The present work reports an environmentally benign process for the synthesis of gold nanoparticles via microwave-assisted heating method, using a basic amino acid L-Tryptophan as reducing agent. The synthesis was carried out in the presence of a nonionic surfactant Triton X-100 (TX-100) aqueous micellar system. Influence of various reaction parameters such as microwave irradiation time and concentrations of precursor ion were analyzed. The effect of pH on the plasmonic properties and stability of synthesized AuNPs were studied in detail. The various size distributions of gold nanostructures obtained were characterized and analyzed by ultraviolet visible spectroscopy (UV-Vis), TEM and DLS analysis. Fourier transform infrared (FT-IR) measurements were carried out to identify the interaction sites responsible for capping and efficient stabilization by the amino acid as well as the surfactant. The synthesized gold nanoparticles were stable for more than 6 months at ambient conditions. (C) 2011 Published by Elsevier B.V.
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