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Bioinorganic Chemistry and Applications
Volume 2014 (2014), Article ID 784268, 8 pages
Research Article

Sonochemical Synthesis of Silver Nanoparticles Using Starch: A Comparison

1Centro de Nanociencia y Nanotecnologia, Universidad de las Fuerzas Armadas (ESPE), Sangolqui, Ecuador
2Department of Chemistry, Kolhan University, Chaibasa, Jharkhand 833202, India

Received 21 October 2013; Revised 25 November 2013; Accepted 26 November 2013; Published 22 January 2014

Academic Editor: Konstantinos Tsipis

Copyright © 2014 Brajesh Kumar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A novel approach was applied to synthesize silver nanoparticles using starch under sonication. Colloidal silver nanoparticles solution exhibited an increase of absorption from 420 to 440 nm with increase starch quantity. Transmission electron microscopy followed by selected area electron diffraction pattern analysis indicated the formation of spherical, polydispersed, amorphous, silver nanoparticles of diameter ranging from 23 to 97 nm with mean particle size of 45.6 nm. Selected area electron diffraction (SAED) confirmed partial crystalline and amorphous nature of silver nanoparticles. Silver nanoparticles synthesized in this manner can be used for synthesis of 2-aryl substituted benzimidazoles which have numerous biomedical applications. The optimized reaction conditions include 10 ml of 1 mM AgNO3, 25 mg starch, 11 pH range, and sonication for 20 min at room temperature.