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New Findings in Nanoparticles Described from University of Madras (One pot green synthesis of Ag, Au and Au-Ag alloy nanoparticles using isonicotinic...

September 9, 2014



New Findings in Nanoparticles Described from University of Madras (One pot green synthesis of Ag, Au and Au-Ag alloy nanoparticles using isonicotinic acid hydrazide and starch)

By a News Reporter-Staff News Editor at Life Science Weekly -- Data detailed on Nanoparticles have been presented. According to news reporting out of Tamil Nadu, India, by NewsRx editors, research stated, "Gold-silver alloy nanoparticles were synthesized via chemical reduction of varying mole fractions of chloroauric acid (HAuCl4) and silver nitrate (AgNO3) by environmentally benign isonicotinic acid hydrazide (INH) in the presence of starch as a capping agent in aqueous medium. The absorption spectra of Au-Ag nanoparticles show blue shift with increasing silver content indicating the formation of alloy nanoparticles."

Our news journalists obtained a quote from the research from the University of Madras, "When the Ag content in the alloy decreases the size of the nanoparticles increases and as a result of which the oxidation potential also increases. The emission maximum undergoes a red shift from 443 to 614nm. The nanoparticles are monodisperse and spherical with an average particle size of 3-18 nm."

According to the news editors, the research concluded: "The catalytic behavior of alloy nanoparticles indicate that the rate constant for the reduction of 4-nitro phenol to 4-amino phenol increases exponentially from metallic Ag to metallic Au as Au content increases in the Au-Ag alloy nanoparticles."

For more information on this research see: One pot green synthesis of Ag, Au and Au-Ag alloy nanoparticles using isonicotinic acid hydrazide and starch. Carbohydrate Polymers, 2014;111():734-743. Carbohydrate Polymers can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Carbohydrate Polymers - www.elsevier.com/wps/product/cws_home/405871)

Our news journalists report that additional information may be obtained by contacting S. Malathi, University of Madras, Dept. of Inorgan Chem, Chennai 600025, Tamil Nadu, India. Additional authors for this research include T. Ezhilarasu, T. Abiraman and S. Balasubramanian (see also Nanoparticles).

Keywords for this news article include: Tamil Nadu, India, Asia, Emerging Technologies, Nanoparticle, Nanoparticles, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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