Fabrication and evaluation of thin-film solid-state sensors for hydrogen sulfide detection

Fabrication and gas sensing performance of parallel assemblies of metal oxide nanotubes supported by porous aluminum oxide membranes

“…A primary consideration for choosing WO 3 is that conformal thin films of WO 3 can be deposited using relatively simple sol-gel methods [21,22]. In addition, WO 3 -based gas sensors have been reported to exhibit high sensitivity and long-term stability [23] towards various gases, including H 2 O, NO 2 , NH 3 , H 2 , O 3 , H 2 S, and volatile organic compounds [22,[24][25][26][27][28][29][30][31][32]. The sensing behavior of the nanotube/AAO membrane sensor is compared to that of a planar WO 3 -film sensor for detecting reducing [methanol (CH 3 OH)] and oxidizing [nitrogen dioxide (NO 2 )] gases in air.…”

The sonochemical preparation of tungsten oxide nanoparticlesElectronic supplementary information (ESI) available: Table S1; elemental analysis values of the product of W(CO)6 sonication in diphenylmethane and of samples heated at 550 °C in Ar and 1000 °C in Ar or air. Fig. S1: TEM image of the product heated at 1000 °C. See http://www.rsc.org/suppdata/jm/b1/b106036h/

“…Tungsten oxides have been intensively studied for a long period of time because of their promising physical properties and applications in chemistry. WO 3 is a good electrochromic, [1][2][3][4][5][6][7] optochromic, [8][9][10] and gasochromic 11,12 material. It has been used to construct electrochromic windows, 1,[13][14][15] infrared switching devices, 2,16 writing-reading-erasing optical devices, 8,17 gas sensors for the determination of NO 2 , 12 hydrogen sulfide, 11 hydrogen, 18 ammonia, 19 and O 3 , 20,21 and to produce humidity and temperature sensors.…”

“…WO 3 is a good electrochromic, [1][2][3][4][5][6][7] optochromic, [8][9][10] and gasochromic 11,12 material. It has been used to construct electrochromic windows, 1,[13][14][15] infrared switching devices, 2,16 writing-reading-erasing optical devices, 8,17 gas sensors for the determination of NO 2 , 12 hydrogen sulfide, 11 hydrogen, 18 ammonia, 19 and O 3 , 20,21 and to produce humidity and temperature sensors. 21 WO 3 and the sub-stoichiometric tungsten oxide WO 2 are good catalysts [22][23][24][25] and photocatalysts.…”

Nanostructured electrochromic films by inkjet printing on large area and flexible transparent silver electrodes

“…Inkjet printing itself has grown into an important topic in scientic research and technology 9 and has been effectively applied in plastic electronics. 10 Typical methods of WO 3 deposition include thermal evaporation, 11 laser ablation, 12 sputtering, 1,13 chemical vapour deposition, 14,15 metal-organic deposition techniques with the use of suitable tungsten-organic compounds, 16,17 spray pyrolysis, 18 electrodeposition, [19][20][21] sol-gel techniques [22][23][24][25] and many more.…”