Title

Sol-gel derived ZnO/PVP nanocomposite thin film for superoxide radical sensor

Authors

Authors

T. B. Du; H. W. Song;O. J. Ilegbusi

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Mater. Sci. Eng. C-Biomimetic Supramol. Syst.

Keywords

zinc oxide; nanoparticle; sol-gel; sensor; nanocomposite; ZNO FILMS; PEROXIDASE; DISMUTASES; OXIDATION; OXYGEN; ANION; Materials Science, Multidisciplinary

Abstract

Pure ZnO films and ZnO nanoparticle-dispersed polyvinylpyrrolidone (PVP) composite films are prepared on Pyrex glass substrates by the sol-gel dip-coating technique utilizing zinc acetate precursor. The thin films are extensively characterized for surface morphology, chemistry, and nanocrystallite size using various advanced analytical techniques including Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). For the processing conditions considered, ZnO, semiconductor thin films with nanocrystallite size 20-30 nm are obtained. The ZnO nanoparticle size in the PVP composite film increases with increase in ZnO content. The resistance of both the synthesized ZnO and ZnO/PVP thin films decrease significantly after exposure to solution containing superoxide anion radicals (SOR). The results thus indicate that ZnO and ZnO/PVP composite thin films can be used as biosensors for SOR and potentially for characterizing the antioxidant properties of fluids. (c) 2006 Elsevier B.V. All rights reserved.

Journal Title

Materials Science & Engineering C-Biomimetic and Supramolecular Systems

Volume

27

Issue/Number

3

Publication Date

1-1-2007

Document Type

Article; Proceedings Paper

Language

English

First Page

414

Last Page

420

WOS Identifier

WOS:000245130000010

ISSN

0928-4931

Share

COinS