Effect of bias voltage and carrier gas on the hydrogen gas-sensing properties of tungsten oxide nanobeads

We investigated the effect of bias voltage and carrier gas on hydrogen sensing performance tungsten oxide nanobeads. The nanobeads were prepared by a template-assisted method followed calcination. porous single walled carbon nanotube thin film was used as sacrificed template for deposition tungsten, thermal calcination at high temperature to oxidize W into WO3 burn out template. crystal structures morphology synthesized materials characterized X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission microscopy Raman spectra. Hydrogen properties tested in air N2 refence comparison. Our results indicated that Schottky junction formed interface Pt electrodes. sensor operated under revered processed excellent performance. In addition, H2 is higher when measured reference.