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|a 10.1021/acs.langmuir.3c00107
|2 doi
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|a pubmed24n1192.xml
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|a eng
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| 100 |
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|a Vujin, Jasna
|e verfasserin
|4 aut
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|a Direct Probing of Water Adsorption on Liquid-Phase Exfoliated WS2 Films Formed by the Langmuir-Schaefer Technique
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|c 2023
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 13.06.2023
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|a Date Revised 13.06.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a 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
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|a Journal Article
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|a Huang, Weixin
|e verfasserin
|4 aut
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|a Ciganović, Jovan
|e verfasserin
|4 aut
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|a Ptasinska, Sylwia
|e verfasserin
|4 aut
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|a Panajotović, Radmila
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 39(2023), 23 vom: 13. Juni, Seite 8055-8064
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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|g volume:39
|g year:2023
|g number:23
|g day:13
|g month:06
|g pages:8055-8064
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|u http://dx.doi.org/10.1021/acs.langmuir.3c00107
|3 Volltext
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