Academic literature on the topic 'Au/WO3'

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Journal articles on the topic "Au/WO3"

1

Xue, Dongping, and Zhanying Zhang. "Au-sensitized WO3 nanoparticles synthesized and their enhanced acetone sensing properties." Functional Materials Letters 11, no. 04 (2018): 1850071. http://dx.doi.org/10.1142/s1793604718500716.

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Au-sensitized WO3 nanoparticles have been synthesized by a facile two-step hydrothermal method. The structures, morphologies and surface compositions of the materials were characterized by X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and scanning electron microscopy (SEM). The test results show that we have prepared higher purity Au-sensitized WO3 nanoparticles. The gas-sensing properties of pure and Au-sensitized WO3 nanoparticles on acetone vapor were further investigated. The results obtained show that the response-recovery time of the two samples prepared is relatively sho
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2

Minggu, Lorna Jeffery, Nurul Akmal Jaafar, Kim Hang Ng, Khuzaimah Arifin, and Rozan Mohamad Yunus. "Electrodeposited WO3/Au Photoanodes for Photoelectrochemical Reactions." Sains Malaysiana 49, no. 12 (2020): 3155–63. http://dx.doi.org/10.17576/jsm-2020-4912-27.

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This work aims to study the effect of gold (Au) loading on the photoelectrochemical behavior of tungsten trioxide (WO3) photoelectrodes. The WO3 film has been fabricated via electrodeposition method with constant potential on fluorine doped tin oxide (FTO) glass substrate. The Au nanoparticle loading on WO3 films surface was also prepared by constant potential electrodeposition. Due to the small amount of Au loading, the band gap values of the plasmonized WO3 remained around 2.6 eV. However, during the photoelectrochemical analysis, the photoactivity of the plasmonized WO3 photoelectrodes impr
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3

Jeffery Minggu, Lorna, Nurul Akmal Jaafar, Kim Hang Ng, Khuzaimah Arifin, and Rozan Mohamad Yunus. "Electrodeposited WO3/Au Photoanodes for Photoelectrochemical Reactions." Sains Malaysiana 49, no. 12 (2020): 3209–17. http://dx.doi.org/10.17576/jsm-2020-4912-32.

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This work aims to study the effect of gold (Au) loading on the photoelectrochemical behavior of tungsten trioxide (WO3) photoelectrodes. The WO3 film has been fabricated via electrodeposition method with constant potential on fluorine doped tin oxide (FTO) glass substrate. The Au nanoparticle loading on WO3 films surface was also prepared by constant potential electrodeposition. Due to the small amount of Au loading, the band gap values of the plasmonized WO3 remained around 2.6 eV. However, during the photoelectrochemical analysis, the photoactivity of the plasmonized WO3 photoelectrodes impr
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4

Figueiredo, Nuno M., Filipe Vaz, Luís Cunha, and Albano Cavaleiro. "Au-WO3 Nanocomposite Coatings for Localized Surface Plasmon Resonance Sensing." Materials 13, no. 1 (2020): 246. http://dx.doi.org/10.3390/ma13010246.

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Localized surface plasmon resonance (LSPR) gas sensors are gaining increasing importance due to their unique tuneable functional properties. Au-WO3−x nanocomposite coatings, in particular, can be outstandingly sensitive to many different gases. However, a proper understanding of their optical properties and the way in which those properties are correlated to their structure/microstructure, is still needed. In this work, Au-WO3 nanocomposite coatings, with Au contents between 0–11 atomic percent, were grown using reactive magnetron co-sputtering technique and were characterized concerning their
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5

Paliwal, Ayushi, Monika Tomar, and Vinay Gupta. "Thickness Dependent Optical Properties of WO3 Thin Film using Surface Plasmon Resonance." MRS Proceedings 1494 (2013): 233–38. http://dx.doi.org/10.1557/opl.2013.137.

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ABSTRACTThe effect of tungsten oxide (WO3) thin film thickness on the surface plasmon resonance (SPR) properties have been investigated. WO3 films of varying the thickness (36 nm, 60 nm, 80 nm, 100 nm, 150 nm and 200nm) have been deposited onto Au coated prism (Au/prism) by radio frequency (RF) magnetron sputtering technique. The SPR responses of bilayer films were fitted with the Fresnel’s equations in order to calculate the dielectric constant of WO3 thin film. The variation of complex dielectric constant and refractive index with the thickness of WO3 thin film was studied.
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6

Székely, István, Zoltán Kovács, Mihai Rusu, et al. "Tungsten Oxide Morphology-Dependent Au/TiO2/WO3 Heterostructures with Applications in Heterogenous Photocatalysis and Surface-Enhanced Raman Spectroscopy." Catalysts 13, no. 6 (2023): 1015. http://dx.doi.org/10.3390/catal13061015.

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Developing highly efficient Au/TiO2/WO3 heterostructures with applications in heterogeneous photocatalysis (photocatalytic degradation) and surface-enhanced Raman spectroscopy (dye detection) is currently of paramount significance. Au/TiO2/WO3 heterostructures were obtained via heat or time-assisted synthesis routes developed by slightly modifying the Turkevich–Frens synthesis methods and were investigated by TEM, SEM, XRD, Raman spectroscopy, XPS, photoluminescence, and UV–vis DRS techniques. Structural features, such as WO3 crystalline phases, TiO2 surface defects, as well as the WO3 (220) t
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7

Yoo, Ran, Hyun-Sook Lee, Wonkyung Kim, et al. "Selective Detection of Nitrogen-Containing Compound Gases." Sensors 19, no. 16 (2019): 3565. http://dx.doi.org/10.3390/s19163565.

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N-containing gaseous compounds, such as trimethylamine (TMA), triethylamine (TEA), ammonia (NH3), nitrogen monoxide (NO), and nitrogen dioxide (NO2) exude irritating odors and are harmful to the human respiratory system at high concentrations. In this study, we investigated the sensing responses of five sensor materials—Al-doped ZnO (AZO) nanoparticles (NPs), Pt-loaded AZO NPs, a Pt-loaded WO3 (Pt-WO3) thin film, an Au-loaded WO3 (Au-WO3) thin film, and N-doped graphene—to the five aforementioned gases at a concentration of 10 parts per million (ppm). The ZnO- and WO3-based materials exhibited
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8

Lamichhane, Shiva, Savita Sharma, Monika Tomar, and Arijit Chowdhuri. "Effect of variation in glancing angle deposition on resistive switching property of WO3 thin films for RRAM devices." Journal of Applied Physics 132, no. 13 (2022): 134102. http://dx.doi.org/10.1063/5.0103236.

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In this paper, nanostructured tungsten oxide (WO3) thin films are deposited using the RF-magnetron sputtering technique in Glancing Angle (GLAD) arrangement. Variation in the structural, morphological, optical, and resistive switching (RS) characteristics of nanostructured WO3 film is investigated as a function of GLAD angle (60°–80°). Electrical studies on nanostructured WO3 films deposited at room temperature are found to exhibit enhanced bipolar resistive-switching properties in metal–insulator–metal pattern [Au/WO3/ITO]. The RON/ROFF ratio between high and low resistance states was noted t
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9

Fauzi, Aynul Sakinah Ahmad, Nur Laila Hamidah, Shota Kitamura, et al. "Electrochemical Detection of Ethanol in Air Using Graphene Oxide Nanosheets Combined with Au-WO3." Sensors 22, no. 9 (2022): 3194. http://dx.doi.org/10.3390/s22093194.

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Detection, monitoring, and analysis of ethanol are important in various fields such as health care, food industries, and safety control. In this study, we report that a solid electrolyte gas sensor based on a proton-conducting membrane is promising for detecting ethanol in air. We focused on graphene oxide (GO) as a new solid electrolyte because it shows a high proton conductivity at room temperature. GO nanosheets are synthesized by oxidation and exfoliation of expanded graphite via the Tour’s method. GO membranes are fabricated by stacking GO nanosheets by vacuum filtration. To detect ethano
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10

Balázsi, Csaba, Radu Ionescu, and Katarína Sedlácková. "Hexagonal WO3 Films with Carbon Nanotubes for Sensing Applications." Materials Science Forum 589 (June 2008): 67–71. http://dx.doi.org/10.4028/www.scientific.net/msf.589.67.

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In this work, nanocrystalline hexagonal tungsten oxide was prepared by acidic precipitation from sodium tungstate solution. TEM studies of nanopowders showed that the average size of the hexagonal nanoparticles is 30-50 nm. Novel nanocomposites were prepared by embedding a low amount of gold decorated carbon nanotubes into the hex-WO3 matrix. The addition of MWCNTs lowered the temperature range of sensitivity of hex-WO3 nanocomposites to NO2 hazardous gas. The sensitivity of hex - WO3 with Au-decorated MWCNTs to NO2 is at the temperature range between 25°C and 250°C.
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