Sheela, B. and Vergheese, T.M. and Kavitha, A.L. and Manoj, V. and Yegnaraman, V. (2008) Electrochemical preparation of copper–dendrimer nanocomposites: picomolar detection of Cu2+ ions. Anal Bioanal Chem, 390. pp. 939-946.

PDF - Published Version Restricted to Registered users only Download (452Kb) | Request a copy

Abstract

The present work describes, for the first time, in situ electrochemical preparation of dendrimer-encapsulated Cu nanoparticles using a self-assembled monolayer of fourthgeneration amine-terminated polyamidoamine (PAMAM) dendrimer as the template. Atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) studies of the modified surface confirmed the presence of Cu nanoparticles entrapped in dendrimer film. Au electrode modified with a monolayer of the dendrimer enables preconcentration and subsequent voltammetric detection of Cu2+ at picomolar concentrations. Further, Cu nanoparticles in the dendrimer monolayer could be electrochemically derivatised to Cu hexacyanoferrate, which exhibits specific crystal planes, unlike the random distribution of crystal planes in bulkformed Cu hexacyanoferrate, which is another catalytically active material for sensor applications.

Item Type:	Article
Subjects:	Electrodics and Electrocatalysis Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	Dr. Narayanan Meyyappan
Date Deposited:	13 Jan 2012 06:40
Last Modified:	05 Nov 2013 12:56
URI:	http://cecri.csircentral.net/id/eprint/1

Actions (login required)

View Item