Abstract
Ultra-long rutile tin dioxide nanowires and nanobelts are synthesized by thermal oxidationof tin powder using gold film as the catalyst. Nanowire or nanobelts can be selectivelyproduced by tuning the reaction temperature. The vapour–liquid–solid growthmechanism is proposed. The band gaps of the nanowires and nanobelts are 3.74 and3.81 eV respectively, determined from UV/visible absorption spectral results. TheSnO2 nanowires show stable photoluminescence with two emission peaks centred at around 470and 560 nm. Their wavelengths stay almost fixed while their intensities dependsensitively on the temperatures within the examination ranges from 10 to 300 K. TheSnO2 nanobelts show similar photoluminescence behaviours and the origin of the luminescence isdiscussed.
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