Open Access

Thermal decomposition as route for silver nanoparticles

  • S. Navaladian1,
  • B. Viswanathan1Email author,
  • R. P. Viswanath1 and
  • T. K. Varadarajan1
Nanoscale Research Letters20062:44

DOI: 10.1007/s11671-006-9028-2

Received: 4 September 2006

Accepted: 18 October 2006

Published: 28 November 2006


Single crystalline silver nanoparticles have been synthesized by thermal decomposition of silver oxalate in water and in ethylene glycol. Polyvinyl alcohol (PVA) was employed as a capping agent. The particles were spherical in shape with size below 10 nm. The chemical reduction of silver oxalate by PVA was also observed. Increase of the polymer concentration led to a decrease in the size of Ag particles. Ag nanoparticle was not formed in the absence of PVA. Antibacterial activity of the Ag colloid was studied by disc diffusion method.


Ag nanoparticles Synthesis Silver oxalate Thermal decomposition E. coli




We thank Prof. G. Sathyanarayana, Department of Biotechnology, IIT Madras, Chennai-36, for providing the facilities to carry out antibacterial study.

Authors’ Affiliations

National Centre for Catalysis Research, Department of Chemistry, Indian Institute of Technology Madras


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© to the authors 2006