Wang, YuRamos, IdaliaSantiago-Aviles, Jorge J2023-05-222023-05-222007-11-012008-01-15https://repository.upenn.edu/handle/20.500.14332/33514Optical 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.fibresfourier transform spectrainfrared spectrananostructured materialsnanotechnologynanostructurred materialsoptical constantsphotoconductivitypyrolysissemiconductor growthsemiconductor materialstin compoundsultraviolet spectravisible spectraArticle