Controlling the electronic structure of SnO2 nanowires by Mo-doping

Mo-doped SnO₂ (MTO) nanowires are synthesized by anin-situ doping chemical vapour deposition method. Raman scatteringspectra indicate that the lattice symmetry of MTO nanowires lowerswith the increase of Mo doping, which implies that Mo ions do enterinto the lattice of SnO₂ nanowire. Ultraviolet-visible diffusereflectance spectra show that the band gap of MTO nanowiresdecreases with the increase of Mo concentration. Thephotoluminescence emission of SnO₂ nanowires around 580~nm atroom temperature can also be controlled accurately by Mo-doping, andit is extremely sensitive to Mo ions and will disappear when theatomic ratio reaches 0.46%.