Synthesis of Nanostructured Tungsten Oxide Crystalline Films
Over the last decade, nanostructured tungsten oxide materials have attracted much interest due to their potential for catalyst, gas sensors, crystalline film and electrochromic material applications. Several studies have been conducted by using various techniques, including the oxygen plasma processing, plasma sputtering, chemical solution, sol-gel techniques, electron beam evaporation deposition, electrochemical etching, and the chemical vapor deposition techniques. Most work concerned the synthesis of nanoparticles for catalytic applications based on chemical solution methods.The nanostructured tungsten oxide materials were synthesized using a simple hot filament CVD technique. The details of the process were described elsewhere in our previous publications. The tungsten filament acted as a precursor for tungsten oxide, and no catalyst or other tungsten-containing compound precursor was used. Both AlN and A ceramic substrates were used. Prior to the experiments, the ...