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(PDF) Surface energy and wettability of van der Waals ...

Theory Ideal surface.-The wettability of an ideal surface is quantified by the well-known Young's equation: 10 γ lv cos θ = γ sv − γ sl [1] where θ is the contact angle, i.e., the angle at ...

Tungsten disulfide: synthesis and applications in ...

Recently, two-dimensional transition metal dichalcogenides, particularly WS2, raised extensive interest due to its extraordinary physicochemical properties. With the merits of low costs and prominent properties such as high anisotropy and distinct crystal structure, WS2 is regarded as a competent substitute in the construction of next-generation environmentally benign energy storage and ...

Monolayer Vanadium‐Doped Tungsten Disulfide: A …

Monolayer tungsten disulfide is a direct‐gap semiconductor with high photoluminescence yield that can achieve a reasonably high on/off current ratio (>10 5) in field‐effect transistor geometries. [ 20 ] Reliable substitutional cation doping of WS 2 and its sister material MoS 2 can induce degenerate n‐type (rhenium [ 21 ] ) and p‐type ...

Photocatalytic properties and energy band offset of a ...

Photocatalytic properties and energy band offset of a tungsten disulfide/graphitic carbon nitride van der Waals heterojunction. Jianjun Liu * ab and Enda Hua c a School of Physics and Electronic Information, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China. E-mail: jjliu@chnu.edu.cn b Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education ...

Photocatalytic properties and energy band offset of a ...

Directed Energy Transfer from Monolayer WS2 to …

2020-11-24 · To date, most have focused on charge transfer and energy transfer from QDs to TMDs, that is, from 0D to 2D. Here, we present a study of the energy transfer process from a 2D to 0D material, specifically exploring energy transfer from monolayer tungsten disulfide (WS2) to near-infrared emitting lead sulfide–cadmium sulfide (PbS–CdS) QDs.

Tungsten Disulfide Few-layer Film | WS2 | Ossila

Few-layer tungsten disulfide (WS 2) film has a 2D-layered structure with a narrow indirect bandgap of of 1.35 eV.In contrast, the monolayer film possesses a direct bandgap of 2.1 eV. WS 2 few-layer films possess very high NIR light photocatalytic activity. They also have strong UV and visible light photocatalytic activity, making them a valuable and outstanding full solar spectrum photocatalyst.

Tungsten | Home - Springer

2020-12-17 · Tungsten disulfide: synthesis and applications in electrochemical energy storage and conversion. Published online: 03 September 2020, Issue 3, 2020. Wen Lei* 1, Jun-Lei Xiao 1, Hai-Peng Liu 1, Quan-Li Jia 2, Hai-Jun Zhang 1. 1 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China

Two‐Dimensional Hybrid Nanosheets of Tungsten …

Composite materials: Tungsten disulfide and WS 2 /reduced graphene oxide (WS 2 /rGO) ... Cheng Zhong, Tungsten disulfide-based nanomaterials for energy conversion and storage, Tungsten, 10.1007/s42864-020-00038-6, (2020). Crossref. ... Applied Surface Science, ...

Two‐Dimensional Hybrid Nanosheets of Tungsten …

Preparation and Photoluminescence of Tungsten …

Tungsten disulfide (WS2) monolayer is a direct band gap semiconductor. The growth of WS2 monolayer hinders the progress of its investigation. In this paper, we prepared the WS2 monolayer through chemical vapor transport deposition. This method makes it easier for the growth of WS2 monolayer through the heterogeneous nucleation-and-growth process.

Analysis of Application Progress of Tungsten Disulfide ...

2020-12-23 · The mass ratio of surface modifier to nano tungsten disulfide is 0.4-0.5. After nano-tungsten disulfide microencapsulation, it can also significantly improve dispersion stability and wear resistance in dispersion media. Measures for microencapsulation include the use of sodium carboxymethyl cellulose, PMMA in situ, or epoxy resin.

Tungsten disulfide - Wikipedia

2020-12-19 · Tungsten disulfide is an inorganic chemical compound composed of tungsten and sulfur with the chemical formula WS 2.This compound is part of the group of materials called the transition metal dichalcogenides.It occurs naturally as the rare mineral tungstenite.This material is a component of certain catalysts used for hydrodesulfurization and hydrodenitrification.

Tungsten disulfide - Wikipedia

Increased monolayer domain size and patterned …

We report a surface energy-controlled low-pressure chemical vapor deposition growth of WS 2 monolayers on SiO 2 using pre-growth oxygen plasma treatment of substrates, facilitating increased monolayer surface coverage and patterned growth without lithography. Oxygen plasma treatment of the substrate caused an increase in the average domain size of WS₂ monolayers by 78% …

Dry Film Lubricant - WS2 Coating - Micro Surface …

Micro Surface Corporation utilizes WS2 per Process SL-39 in the coating process. At Micro Surface Corporation in San Jose, CA, we offer premium tungsten disulfide coating services utilizing our proprietary WS2 per Process SL-39. Tungsten Disulfide Coating is applied using state of the art equipment by our skilled technicians.

Reactive magnetron sputtering of tungsten disulfide …

2019-3-20 · Tungsten disulfide (WS2−x) films (0.07⩽x⩽0.7) were prepared by reactive magnetron sputtering from a tungsten target in rare gas/H2S atmospheres and at substrate temperatures up to 620°C. The nucleation and growth of the films were investigated by in situ energy dispersive x-ray diffraction (EDXRD) and by ex situ techniques such as electron microscopy, elastic recoil detection …