The stability of tungsten trioxide (WO3) suspensions in various common polar solvents such as water, acetone, isopropanol (IPA), ethanol, 1methoxy-2-propanol (1M-2P) and N,N-dimethylformamide (DMF) was investigated. The morphology of WO3 aggregates formed by irregular nanoparticles (d * 40 nm, with 1 lm nominal diameter compact aggregates) and by nanowires of different types (uneven, single or ...

A comparative analysis of electrochromic properties composites CuWO4•WO3, Bi2WO6•WO3 and WO3 films obtained by electrochemical chemical methods was carried out. The study into the kinetics light transmission spectral characteristics coloration revealed some differences in processes. It found that WO3, Bi2WO6•WO3, CuWO4•WO3 series, lithium intercalation film is slowed down, which due to diffusio...

Functionalization of photocatalytic metal oxide nanoparticles TiO2, ZnO, WO3 and CuO with amine-terminated (oleylamine) thiol-terminated (1-dodecanethiol) alkyl chained ligands was studied under ambient conditions. A high selectivity observed in the binding specificity a ligand towards these different oxides. It that oleylamine binds stably to only TiO2 WO3, while 1-dodecanethiol ZnO CuO. Simil...

In a two-terminal Au/hexagonal WO3 nanowire/Au device, ions drifting or carriers self-trapping under external electrical field will modulate the Schottky barriers between the nanowire and electrodes, and then result in memristive effect. When there are water molecules adsorbed on the surface of WO3 nanowire, hydrogen ions will generate near the positively-charged electrode and transport in the ...

The behavior of WO3 photoanodes has been investigated in contact with a combination of four anions (Cl , CH3SO3 , HSO4 , and ClO4 ) and three solvents (water, acetonitrile, and propylene carbonate), to elucidate the role of the semiconductor surface, the electrolyte, and redox kinetics on the current density vs. potential properties of n-type WO3. In 1.0 M aqueous strong acids, although the fla...

Metal oxide semiconductor (MOS) gas sensors are promising for applications in environmental monitoring, dangerous detection, and disease diagnosis. Seeking advanced MOS sensing materials that possess high sensitivity low limit of detection (LOD) at sub-ppm level is a great challenge. Here, we report the first creation two-dimensional (2D) WO3 nanosheets by annealing inorganic fullerene (IF)-lik...

The thick films of Tungsten Oxide (WO3) were prepared by screen-printing technique. Gas-sensing performance of these films was tested for various gases. The pure films showed response to Hydrogen Sulphide, Ethanol, Oxygen, and Cigar smoke. The pure WO3 thick films were surface modified by dipping them into an aqueous solution of CrO3 for different intervals of time. Surface modification improve...

Atomic force and high resolution scanning tunneling analyses were carried out on nanostructured WO3 films. It turned out that the band gap measured by scanning tunneling spectroscopy at surface is lower than the band gap reported in the literature. This effect is attributed to the high density of surface states in this material, which allows tunneling into these states. Such a high density of s...

Tungsten trioxide (WO3) nanobelts in tetragonal structure were grown on Si substrates by a hot-wall chemical vapor deposition (CVD) method without using catalysts. The products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), Raman spectroscopy, and photoluminescence (PL) spectrum. The width of the nanobelts is in the ran...