TY  - 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 . .