Departmental Papers (ESE)


Optical and photoconductive properties of transparent SnO2 nanofibers, made from C22H44O4Sn via electrospinning and metallorganic decomposition, were investigated using Fourier transform infrared and ultraviolet (UV)/visible spectrometry and the two-probe method. Their optical bandgap was determined from their UV absorption edge to be 3.95–4.08 eV. Their conductance responds strongly to UV light for a wavelength of 254 nm: in air its steady-state on-to-off ratios are 1.31–1.56 (rise) and 1.25–1.33 (fall); its 90% rise and fall times are 76–96 and 71–111 s, respectively. In a vacuum of about 10−4 torr, its on-to-off ratios are higher than 35.6 (rise) and 3.4 (fall), respectively, and its 90% rise and fall times are longer than 3×104 s.

Document Type

Journal Article

Date of this Version

November 2007


Copyright 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. Reprinted in Journal of Applied Physics, Volume 102, Issue 9, Article 093517, November 2007, 5 pages.
Publisher URL:


fibres, fourier transform spectra, infrared spectra, nanostructured materials, nanotechnology, nanostructurred materials, optical constants, photoconductivity, pyrolysis, semiconductor growth, semiconductor materials, tin compounds, ultraviolet spectra, visible spectra



Date Posted: 15 January 2008

This document has been peer reviewed.