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Spectral anion sensing and gamma-radiation induced magnetic modifications of polyphenol generated Ag-nanoparticles
ZARINA ANSARI, SUSMITA DHARA, BILWADAL BANDYOPADHYAY, ABHIJIT SAHA,
Published in PERGAMON-ELSEVIER SCIENCE LTD
2016
PMID: 26654966
Volume: 156
   
Pages: 98 - 104
Abstract
A fast one step bio-synthesis for in situ preparation of silver nanoparticles is proposed. The method involves reduction of AgNO3 with an aqueous extract of peanut skin, which is a good source of polyphenols. The silver nanoparticles thus synthesized were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-Vis absorption spectroscopy, Fourier Transform infrared (FTIR) spectroscopy and magnetic measurements. Effect of low dose gamma irradiation during the synthesis was studied and their physico-chemical properties were compared with those produced without irradiation, On the contrary to the diamagnetic behavior of bulk silver, the silver nanoparticles thus prepared show a significant ferromagnetic moment component. Variable time exposure to It gamma-irradiation results in an exponential decay of ferromagnetic component. A freshly prepared solution of silver nanoparticles shows selective spectral changes towards iodide ions at trace concentration (below 50 mu M) among a series of 16 other competing anions. The prepared nanoparticles are therefore suitable for anion sensing application. (c) 2015 Elsevier B.V. All rights reserved.
About the journal
JournalData powered by TypesetSPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
PublisherData powered by TypesetPERGAMON-ELSEVIER SCIENCE LTD
ISSN1386-1425
Open AccessNo