Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
740702 | Sensors and Actuators B: Chemical | 2012 | 10 Pages |
Single crystalline tungsten oxide plates were prepared by hydrothermal method using cetyltrimethyl ammonium bromide (CTAB) supermolecular template. The phase and the morphology of the resulting material were characterized by X-ray diffraction (XRD), Fourier transformed infrared (FTIR) spectrum, scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and Raman spectroscopy, respectively. Indirect-heating sensors using single crystalline WO3 plates as sensitive materials were fabricated on an alumina tube with Au electrodes and platinum wires. The as-fabricated sensor based on WO3 plates showed high response, fast response and recovery toward acetone gas. Compared with the sensor fabricated with WO3 particles prepared by a surfactant-mediated method, the results show that WO3 plates sensor has about 4 times increase in response and good dynamic response.