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International Journal of Electrochemistry
Volume 2011 (2011), Article ID 404937, 6 pages
Research Article

Electrochemical Properties of Silver Nanoparticle Doped Aminosilica Nanocomposite

Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA

Received 2 May 2011; Revised 23 June 2011; Accepted 23 June 2011

Academic Editor: Shen-Ming Chen

Copyright © 2011 Yong-Jae Choi and Tzy-Jiun M. Luo. 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.


The electrochemical properties of silver nanoparticle (d 5 nm) synthesized within aminosilica film from spontaneous reduction reaction were examined using cyclic voltammetry and the results show that the nanocomposite film exhibits similar redox property as solution-synthesized silver nanoparticles when measuring in phosphate buffer solution and its redox potentials were found to be sensitive to the presence of chloride ions. It also shows that silver nanoparticles and hydrolyzed aminosilica increase the electron diffusivity of the aminosilica film. Both results confirm that an accurate reference electrode suitable for microfluidic devices can be created simply by treating an aminosilica-coated electrode with a silver nitrate solution. Furthermore, a humidity sensor based on silver-silica nanocomposite film has also been demonstrated.