Gas sensing properties of the mixed molybdenum tungsten oxide, W0.9Mo0.1O3Electronic supplementary information (ESI) available: A. Scanning electron micrograph of the surface of a mixed molybdenum tungsten oxide gas sensor revealing an open structure and a particle size range from 0.1 to 5 microns. B. Elemental analysis (by X-ray wavelength) of the mixed molybdenum tungsten oxide prepared and used in this

Abstract

The mixed oxide W 0.9 Mo 0.1 O 3 responds sensitively to oxidizing gases such as ozone and NOx in air and suffers only a mild interference from changes in relative humidity. The mixed oxide has a small activation energy for conduction (0.1 eV) and an unusual concentration dependence of response at low temperatures. Possible response mechanisms are considered.