Sensing performance of palladium-functionalized WO3 nanowires by a drop-casting method

A highly sensitive BTX sensor based on electrochemically derived wall connected TiO2 nanotubes

“…It is further established that, imprints of Pd on TiO 2 surface leads to dramatic increase of response magnitude (from 2.09% to 65% for 200 ppm toluene) even at room temperature [15]. In a similar way, Pd sensitization of WO 3 nanowires proved to be helpful for reducing the recovery time (from ~31 min to 15 min) as demonstrated by Chávez et al [5].…”

“…several metal oxide (Co 3 O 4 , WO 3 , ZnO, Cr 2 O 3 , SnO 2 , TiO 2 etc.) based gas/vapor sensors have been investigated so far to sense the BTX family as a whole or its individual constituents (B, T or X) [4][5][6][7][8][9][10][11][12][13][14][15]. It is revealed from these reports that efficient sensor response towards BTX (or individuals) was achieved at the expense of high operating temperature (≥ 250°C) [4][5][6][7][8][9][10].…”

Hydrothermal synthesis porous silicon/tungsten oxide nanorods composites and their gas-sensing properties to NO2 at room temperature

“…Unfortunately, little attention has been concentrated on the preparation of PS/WO 3 nanostructures composite gas sensor by hydrothermal synthesis method, which is more convenient, controllable and economic for large-scale preparation of well-ordered WO 3 nanorods/nanowires than the other preparation methods, such as thermal evaporation and sputtering. Studies have found that the annealing treatment of WO 3 temperature and annealing time, could play an important role in controlling the morphological features and crystallinity of WO 3 nanostructures during the hydrothermal synthesis process [21,22].…”

“…Recently, various one-dimensional (1D) metal oxide semiconductors, such as WO 3 , SnO 2 , ZnO, TeO 2 , CuO, have been widely used as materials for gas sensors due to their high crystallinity and surface-to-volume ratios [3][4][5][6][7]. Among extensive researches for nanostructure sensitive materials, tungsten oxide (WO 3 ) is one of the most interesting materials in detecting NO 2 [8,9].…”

Flexible Ultraviolet and Ambient Light Sensor Based on a Nanomaterial Network Fabricated Using Selective and Localized Wet Chemical Reactions

“…23 Although this is a very simple and cost-effective integration method, it only produces randomly dispersed nanowire networks and provides limited patterning resolution (minimum diameter ~ 1 mm) and thus is not suitable for highly integrated, ultra-compact devices. 24,25 For more accurate and delicate device integration of 1D nanomaterials, numerous methods such as screen printing, 26,27 inkjet printing, 28 contact printing, 21,29 optical trapping, 30 atomic force microscope (AFM) 31 , electrostatic force, 32 magnetic force 33 and dielectrophoresis 34 have been utilized. The printing methods such as screen printing and inkjet printing are simple but provide limited resolutions (minimum diameter ~ 100 µm).…”