|About this Abstract
||Materials Science & Technology 2011
||Next Generation Biomaterials
||Alkoxysilane Mediated Generation of Gold Nanoparticles: Development of Novel Electrocatalytic Materials
||Prem Chandra Pandey, Dheeraj Singh Chauhan
|On-Site Speaker (Planned)
||Prem Chandra Pandey
A novel approach towards synthesis of gold nanoparticles (AuNps) is described using alkoxysilanes containing organic functionalities. This method involves reduction of metal salt with 3-Glycidoxypropyltrimethoxysilane. 3-Aminopropyltrimethoxysilane is utilized to stabilize the gold salt before the reduction step and to protect and prevent agglomeration of the gold sol after reduction and through gelation, drying and aging steps. Through this method well dispersed AuNps of uniform size were obtained. The Nps are characterized using UV-vis spectroscopy and Atomic force microscopy. The synthesized Nps are utilized in the preparation of thin sol-gel films encapsulating potassium ferricyanide as electron transfer mediator. Electrochemical characterization of these films revealed that the presence of Nps lead to dramatic improvement of electrochemistry of ferricyanide. Futhermore, these films were used to study the electrocatalysis of hydrogen peroxide. It was observed that the present sensor is highly sensitive and showed excellent response towards electrochemical reduction of hydrogen peroxide.