Direct Probing of Water Adsorption on Liquid-Phase Exfoliated WS2 Films Formed by the Langmuir-Schaefer Technique
Само за регистроване кориснике
2023
Чланак у часопису (Објављена верзија)
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Tungsten disulfide, a transition metal dichalcogenide, has numerous applications as active components in gas- and chemical-sensing devices, photovoltaic sources, photocatalyst substrates, etc. In such devices, the presence of water in the sensing environment is a factor whose role has not been well-understood. To address this problem, the in situ probing of H2O molecule adsorption on WS2 films supported on solid substrates has been performed in a near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) setup. Instead, on the individual nanoflakes or spray-coated samples, the measurements were performed on highly transparent, homogeneous, thin films of WS2 nanosheets self-assembled at the interface of two immiscible liquids, water and toluene, transferred onto a solid substrate by the Langmuir-Schaefer technique. This experiment shows that edge defects in nanoflakes, tungsten dangling bond ensuing the exfoliation in the liquid phase, represent active sites for the WO3, WO3-x, an...d WO3·nH2O formation under ambient conditions. These oxides interact with water molecules when the WS2 films are exposed to water vapor in the NAP-XPS reaction cell. However, water molecules do not influence the W-S chemical bond, thus indicating the physisorption of H2O molecules at the WS2 film surface. © 2023 American Chemical Society.
Кључне речи:
Chemical sensors / Molecules / Monolayers / Phase interfaces / Substrates / Sulfur compounds / Thin films / Transition metals / X ray photoelectron spectroscopyИзвор:
Langmuir, 2023, 39, 23, 8055-8064Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200017 (Универзитет у Београду, Институт за нуклеарне науке Винча, Београд-Винча) (RS-MESTD-inst-2020-200017)
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-FC02-04ER15533 (NDRL 5372)]
DOI: 10.1021/acs.langmuir.3c00107
ISSN: 0743-7463
PubMed: 37265360
Scopus: 2-s2.0-85163252471
Институција/група
VinčaTY - JOUR AU - Vujin, Jasna AU - Huang, Weixin AU - Ciganović, Jovan AU - Ptasinska, Sylwia AU - Panajotović, Radmila PY - 2023 UR - https://vinar.vin.bg.ac.rs/handle/123456789/11213 AB - Tungsten disulfide, a transition metal dichalcogenide, has numerous applications as active components in gas- and chemical-sensing devices, photovoltaic sources, photocatalyst substrates, etc. In such devices, the presence of water in the sensing environment is a factor whose role has not been well-understood. To address this problem, the in situ probing of H2O molecule adsorption on WS2 films supported on solid substrates has been performed in a near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) setup. Instead, on the individual nanoflakes or spray-coated samples, the measurements were performed on highly transparent, homogeneous, thin films of WS2 nanosheets self-assembled at the interface of two immiscible liquids, water and toluene, transferred onto a solid substrate by the Langmuir-Schaefer technique. This experiment shows that edge defects in nanoflakes, tungsten dangling bond ensuing the exfoliation in the liquid phase, represent active sites for the WO3, WO3-x, and WO3·nH2O formation under ambient conditions. These oxides interact with water molecules when the WS2 films are exposed to water vapor in the NAP-XPS reaction cell. However, water molecules do not influence the W-S chemical bond, thus indicating the physisorption of H2O molecules at the WS2 film surface. © 2023 American Chemical Society. T2 - Langmuir T1 - Direct Probing of Water Adsorption on Liquid-Phase Exfoliated WS2 Films Formed by the Langmuir-Schaefer Technique VL - 39 IS - 23 SP - 8055 EP - 8064 DO - 10.1021/acs.langmuir.3c00107 ER -
@article{ author = "Vujin, Jasna and Huang, Weixin and Ciganović, Jovan and Ptasinska, Sylwia and Panajotović, Radmila", year = "2023", abstract = "Tungsten disulfide, a transition metal dichalcogenide, has numerous applications as active components in gas- and chemical-sensing devices, photovoltaic sources, photocatalyst substrates, etc. In such devices, the presence of water in the sensing environment is a factor whose role has not been well-understood. To address this problem, the in situ probing of H2O molecule adsorption on WS2 films supported on solid substrates has been performed in a near-ambient pressure X-ray photoelectron spectroscopy (NAP-XPS) setup. Instead, on the individual nanoflakes or spray-coated samples, the measurements were performed on highly transparent, homogeneous, thin films of WS2 nanosheets self-assembled at the interface of two immiscible liquids, water and toluene, transferred onto a solid substrate by the Langmuir-Schaefer technique. This experiment shows that edge defects in nanoflakes, tungsten dangling bond ensuing the exfoliation in the liquid phase, represent active sites for the WO3, WO3-x, and WO3·nH2O formation under ambient conditions. These oxides interact with water molecules when the WS2 films are exposed to water vapor in the NAP-XPS reaction cell. However, water molecules do not influence the W-S chemical bond, thus indicating the physisorption of H2O molecules at the WS2 film surface. © 2023 American Chemical Society.", journal = "Langmuir", title = "Direct Probing of Water Adsorption on Liquid-Phase Exfoliated WS2 Films Formed by the Langmuir-Schaefer Technique", volume = "39", number = "23", pages = "8055-8064", doi = "10.1021/acs.langmuir.3c00107" }
Vujin, J., Huang, W., Ciganović, J., Ptasinska, S.,& Panajotović, R.. (2023). Direct Probing of Water Adsorption on Liquid-Phase Exfoliated WS2 Films Formed by the Langmuir-Schaefer Technique. in Langmuir, 39(23), 8055-8064. https://doi.org/10.1021/acs.langmuir.3c00107
Vujin J, Huang W, Ciganović J, Ptasinska S, Panajotović R. Direct Probing of Water Adsorption on Liquid-Phase Exfoliated WS2 Films Formed by the Langmuir-Schaefer Technique. in Langmuir. 2023;39(23):8055-8064. doi:10.1021/acs.langmuir.3c00107 .
Vujin, Jasna, Huang, Weixin, Ciganović, Jovan, Ptasinska, Sylwia, Panajotović, Radmila, "Direct Probing of Water Adsorption on Liquid-Phase Exfoliated WS2 Films Formed by the Langmuir-Schaefer Technique" in Langmuir, 39, no. 23 (2023):8055-8064, https://doi.org/10.1021/acs.langmuir.3c00107 . .