A probe into the surface and interface phenomenon of WO3 endowing with superwettability and super gas sensing ability

The surface engineering to adjust superwettable and gas sensing properties is fascinating. To conduct these investigations, we successfully developed WO3 by a facile method with binary structures: micro sized spherical and nano sized particles or slices. The design and understanding of superwettability to water and sensing ability to acetone gases of the as-prepared WO3 are investigated by multiple technologies. The results of present study, superhydrophilicity (∼0°) and underwater ultra-oleophobicity (143.8°) or superhydrophobicity after surface modification (158.7°) and high sensitivity (%) to acetone of 100 ppm: 82.6, are quite desirable and could be arouse the interest of other researchers and materials engineers who are engaged in surface-functionalization field.

175The superwettable capability and gas sensing ability of the as-prepared multifunctional WO3 are investigated.