Friction control by engineering the crystallographic orientation of the lubricating few-layer MoS2 films

Bodík, Michal; Sojková, M.; Hulman, Martin; Ťapajna, M.; Truchlý, Martin; Végsö, Karol; Jergel, M.; Majková, E.; Španková, M.; Šiffalovič, Peter

doi:10.1016/j.apsusc.2020.148328

Cited by 13 publications

(14 citation statements)

References 25 publications

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“…The layered crystals, self-assembled monolayers, and hard amorphous and crystalline coatings [7][8][9][10] were proposed as effective thin-film materials to reduce friction and wear of the individual elements of the low-dimensional systems. Van der Waals (vdW) twodimensional (2D) layered crystals with a thickness of several atomic layers and extended dimensions in the other two directions became the most popular dry lubricant, owing to the low shear force between their layers [10,11]. Moreover, this structure can exhibit superlubricity by achieving the crystallographic mismatch when different materials or rotation of the layers are used [12,13].…”

Section: Introductionmentioning

confidence: 99%

Effect of the crystallographic c-axis orientation on the tribological properties of the few-layer PtSe2

Kozak

Sojková

Gucmann

et al. 2022

Applied Surface Science

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Section: Introductionmentioning

confidence: 99%

Effect of the crystallographic c-axis orientation on the tribological properties of the few-layer PtSe2

Kozak

Sojková

Gucmann

et al. 2022

Applied Surface Science

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“…VA MoS 2 layers are gaining particular interest due to their chemically reactive edges, which can be used for solar cells, water disinfection, water splitting, and hydrogen evolution reactions (HER) . The spatial orientation of MoS 2 layers is important in determining the applications of this material. , Therefore, precise control over the growth orientations of these 2D TMD materials is critical to optimize their desired material properties and device functionalities.…”

Section: Introductionmentioning

confidence: 99%

“…20 The spatial orientation of MoS 2 layers is important in determining the applications of this material. 21,22 Therefore, precise control over the growth orientations of these 2D TMD materials is critical to optimize their desired material properties and device functionalities.…”

Section: ■ Introductionmentioning

confidence: 99%

Orientation of Few-Layer MoS₂ Films: In-Situ X-ray Scattering Study During Sulfurization

et al. 2021

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Some of the distinct optical, catalytical, and electronic properties of few-layer MoS2 films arise from a specific orientation of the MoS2 layers. The growth of horizontally or vertically aligned MoS2 during the sulfurization of predeposited Mo film can be controlled by various physical conditions such as temperature, heating rate, Mo film thickness, or sulfur vapor pressure. However, due to the inherent limitations of performing real-time and in situ experiments during sulfurization in a standard growth chamber, only a limited number of analytical techniques can be used to elucidate the in-process phase transformation. Here, we present a comprehensive real-time study of the growth of few-layer MoS2 films by sulfurization of Mo films using in situ grazing-incidence wide-angle X-ray scattering. We demonstrate that the process gas flow, and thus the sulfur partial vapor pressure, is the key control parameter for the few-layer MoS2 layer orientation while all other process parameters remain fixed. Tracking the crystallization of few-layer MoS2 layers in real-time allowed us to estimate the activation energy required for both horizontal and vertical orientations. Growth of either horizontal or vertical MoS2 was observed without a metastable transition between them throughout the sulfurization.

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“…The sulfurization process made these films of CVD (chemical vapour deposition) stacked Mo films at various heating measures. 126…”

Section: Influence Of Various Friction Modifiers In Brake Padsmentioning

confidence: 99%

“…The sulfurization process made these films of CVD (chemical vapour deposition) stacked Mo films at various heating measures. 126 Graphite is one of three allotropes of carbon found in nature, along with coal and diamond. It is also one of the most excellent grades of coal when compared to anthracite.…”

Section: Lubricantsmentioning

confidence: 99%

Brake friction composite materials: A review on classifications and influences of friction materials in braking performance with characterizations

Sathyamoorthy

Vijay

Singaravelu

2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Brake friction materials play an important role in automobiles to reduce speed and to stop the vehicles. Advances in friction materials were updated to ensure effective performances in braking systems and to provide the maximum safety and comfort. Presently eco-friendly friction materials have been used as a replacement for conventional friction materials. Many synthetic and natural products were identified and claimed as better alternatives to banned toxic materials like asbestos and copper. Friction materials developed from natural products are eco-friendly and assure a great promise when applied in modern vehicles. To develop innovative formulations, basic knowledge of common ingredients and their effects in friction materials was needed. This review focuses mainly on providing detailed information about the common ingredients used, processing methods and the characteristics of brake friction materials.

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Friction control by engineering the crystallographic orientation of the lubricating few-layer MoS2 films

Cited by 13 publications

References 25 publications

Effect of the crystallographic c-axis orientation on the tribological properties of the few-layer PtSe2

Effect of the crystallographic c-axis orientation on the tribological properties of the few-layer PtSe2

Orientation of Few-Layer MoS₂ Films: In-Situ X-ray Scattering Study During Sulfurization

Brake friction composite materials: A review on classifications and influences of friction materials in braking performance with characterizations

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Friction control by engineering the crystallographic orientation of the lubricating few-layer MoS2 films

Cited by 13 publications

References 25 publications

Effect of the crystallographic c-axis orientation on the tribological properties of the few-layer PtSe2

Effect of the crystallographic c-axis orientation on the tribological properties of the few-layer PtSe2

Orientation of Few-Layer MoS2 Films: In-Situ X-ray Scattering Study During Sulfurization

Brake friction composite materials: A review on classifications and influences of friction materials in braking performance with characterizations

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Orientation of Few-Layer MoS₂ Films: In-Situ X-ray Scattering Study During Sulfurization