Title

Sol-Gel Derived Zno/Pvp Nanocomposite Thin Film For Superoxide Radical Sensor

Keywords

Nanocomposite; Nanoparticle; Sensor; Sol-gel; Zinc oxide

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. © 2006 Elsevier B.V. All rights reserved.

Publication Date

4-1-2007

Publication Title

Materials Science and Engineering C

Volume

27

Issue

3

Number of Pages

414-420

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.msec.2006.05.040

Socpus ID

33847105428 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33847105428

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