Functionalization of ZnO Nanowires for Potential p-Nitrophenol Sensing Applications

Abstract:

In this work, we demonstrate the functionalization of zinc oxide nanowires with carboxylic acid moieties and investigate their potential application as p-nitrophenol sensors. First, synthesis of high quality zinc oxide nanowires along with appropriate characterization results is discussed. Subsequently, oleic acid, as a model system, is used to examine functionalization behavior of nanowire surface. Vibrational spectroscopic techniques are employed to determine nature of bonding and orientation of oleic acid molecule at nanowire surface. Photoluminescence properties of modified- and unmodified ZnO nanowires with oleic acid were investigated. Based on these results, an appropriate receptor capable of sensitive optical detection of p-nitrophenol is proposed. In addition, results on sensing mechanism of the receptor based on fluorescence quenching are reported, which highlight the capability of selective and sensitive detection of p-nitrophenol analyte using the receptor.

• Periodical: Advanced Materials Research (Volume 567)
• Pages: 228-231
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.567.228
• Online since: September 2012
• Authors: Anurag Gupta, Bruce C. Kim, Eugene Edwards, Christina Brantley, Paul Ruffin
• Keywords: Fluorescence, p-Nitrophenol, Sensing, Surface Functionalization, ZnO Nanowires

References

[1] R.C. Gupta: Toxicology of organophosphate and carbamate compounds (Elsevier Academic Press, 2005).

[2] R. Stephens, A. Spurgeon, I A Calvert, J. Beach, L. S. Levy, et al.: Lancet Vol. 345 (1995), p.1135.

[3] A. Uzer, E. Ercag, R. Apak: Anal Chim Acta Vol. 505 (2005), p.83.

[4] A. Almasi, E. Fischer, P. Perjesi: J Biochem. Biophys. Met Vol. 69 (2006), p.43.

[5] W. Xiao, D, Xiao: Talanta Vol. 72 (2007), p.1288.