Sensors for Detecting Sub‐ppm NO 2 Using Photochemically Produced Amorphous Tungsten Oxide

This paper describes a new approach to making the active elements of gas sensors using a photochemical deposition method. The method involves making amorphous films of photochemically active precursors. These precursors are then exposed to light and, in air, convert to metal oxides. Amorphous films constructed of W(CO)4(Et2‐en) are deposited on interdigitated microelectrodes. Photolysis of these films, in air at room temperature, results in the …