Different crystalline phases of aligned TiO2 nanowires and their ethanol gas sensing properties

Aligned TiO2 nanowires with different crystal phases were prepared by electrospinning and annealing with different temperatures. The morphology, crystal structure and band gap of the samples were characterized using scanning electron microscope (SEM), X-ray diffraction (XRD), Raman, and ultraviolet–visible (UV–vis) absorption. In combination with gold interdigital electrodes, aligned TiO2 nanowires are arranged to fabricate planar sensors. A...