Nanoscale contact mechanics of the interactions at monolayer MoS2 interfaces with Au and Si

Agmon, Liron; Almog, Roy; Gaspar, Dana; Voscoboynik, Guy; Choudhary, Meenakshi; Jopp, Juergen; Klausner, Ziv; Ya’akobovitz, Assaf; Berkovich, Ronen

doi:10.1016/j.triboint.2022.107734

Cited by 13 publications

(4 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Relatively strong adhesion has been predicted by previous DFT calculations for the MoS 2 /Au(111) system . It was confirmed by another FFM experiment revealing pronounced adhesion and higher sliding friction between MoS 2 and the Au-coated tip, in contrast to the silicon tip . The friction force measurements of the MoS 2 /Au(111) system were carried out, revealing apparent independence of friction on load with a relatively large moiré size of 3.3 nm, in contrast to the previously reported moiré level friction at the ridge leading to a highly dissipated regime.…”

Section: Sliding Friction On Moiré Superlatticesupporting

confidence: 71%

“… 71 It was confirmed by another FFM experiment revealing pronounced adhesion and higher sliding friction between MoS 2 and the Au-coated tip, in contrast to the silicon tip. 72 The friction force measurements of the MoS 2 /Au(111) system were carried out, revealing apparent independence of friction on load with a relatively large moiré size of 3.3 nm, 70 in contrast to the previously reported moiré level friction at the ridge leading to a highly dissipated regime. The puckering effect is not observable when analyzing the corresponding lateral force trace and retrace ( Figure 4 ).…”

Section: Sliding Friction On Moiré Superlatticementioning

confidence: 86%

See 1 more Smart Citation

Atomic Friction Processes of Two-Dimensional Materials

Song,

Meyer

2023

Langmuir

View full text Add to dashboard Cite

In this Perspective, we present the recent advances in atomic friction measured of two-dimensional materials obtained by friction force microscopy. Starting with the atomic-scale stick−slip behavior, a beautiful highly nonequilibrium process, we discuss the main factors that contribute to determine sliding friction between single asperity and a two-dimensional sheet including chemical identity of material, thickness, external load, sliding direction, velocity/temperature, and contact size. In particular, we focus on the latest progress of the more complex friction behavior of moireś ystems involving 2D layered materials. The underlying mechanisms of these frictional characteristics observed during the sliding process by theoretical and computational studies are also discussed. Finally, a discussion and outlook on the perspective of this field are provided.

show abstract

Section: Sliding Friction On Moiré Superlatticesupporting

confidence: 71%

Section: Sliding Friction On Moiré Superlatticementioning

confidence: 86%

Atomic Friction Processes of Two-Dimensional Materials

Song,

Meyer

2023

Langmuir

View full text Add to dashboard Cite

show abstract

“…This feature allows to obtain controlled thicknesses down to the single layers, useful for tuning several physical properties, such as the electronic band gap, the vibrational levels, and the excitons, and for their implementation in thin nanodevices, e.g., transistors, photodetectors, and electroluminescent devices. − In this regard, a key point is the interaction between TMDs and substrates, which has been shown to critically impact the heterostructure properties. Hence, the choice of the substrate constitutes a fundamental aspect for the application of TMDs heterostructures in electronic circuits. − To design functional devices, the thermoelastic response of the structure, i.e., how fast can heat be dissipated, together with its elastic properties, which are also relevant for technological applications, , are fundamental aspects to be considered.…”

Section: Introductionmentioning

confidence: 99%

Impact of MoS₂ Monolayers on the Thermoelastic Response of Silicon Heterostructures

Soranzio,

Puntel,

Tuniz

et al. 2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Understanding the thermoelastic response of a nanostructure is crucial for the choice of materials and interfaces in electronic devices with improved and tailored transport properties at the nanoscale. Here, we show how the deposition of a MoS 2 monolayer can strongly modify the nanoscale thermoelastic dynamics of silicon substrates close to their interface. We demonstrate this by creating a transient grating with extreme ultraviolet light, using ultrashort free-electron laser pulses, whose ≈84 nm period is comparable to the size of elements typically used in nanodevices, such as electric contacts and nanowires. The thermoelastic response, featuring coherent acoustic waves and incoherent relaxation, is tangibly modified by the presence of monolayer MoS 2 . Namely, we observed a major reduction of the amplitude of the surface mode, which is almost suppressed, while the longitudinal mode is basically unperturbed, aside from a faster decay of the acoustic modulations. We interpret this behavior as a selective modification of the surface elasticity, and we discuss the conditions to observe such effect, which may be of immediate relevance for the design of Si-based nanoscale devices.

show abstract

“…To solve the problem of low bearing capacity and limited application range of pure MoS 2 coating, component doping of MoS 2 -based coating is a typical improvement method. At present, various metal and non-metal elements, such as C, N, Cu, Si, Ta, Ag, Zr, and Ti [4][5][6][7][8][9][10][11], as well as compounds such as TiN and Al 2 O 3 [12,13], have been studied for doping MoS 2 coatings to improve wear resistance. Among them, metal doping can induce the growth of MoS 2 coating with (002) preferred orientation, and the coating structure is more compact, improving the film's wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Argon Flow Rate on Tribological Properties of Rare Earth Ce Doped MoS2 Based Composite Coatings by Magnetron Sputtering

Tian,

Cai,

Xue

et al. 2023

Lubricants

View full text Add to dashboard Cite

Exploring the doping components of the coating is of great significance for improving the tribological properties of the MoS2-based coating. The optimization of magnetron sputtering process parameters can also improve the coating quality. In this paper, the effects of working gas flow rate on the microstructure in a vacuum chamber, nano-hardness, and tribological properties of Ce-Ti/MoS2 coatings were studied using DC and RF unbalanced co-sputtering technology. It is found that the coating structure was coarse and porous when the Ar flow rate was excessive (70 sccm), significantly affecting the mechanical properties; there are pit defects on the surface of the coating when the flow rate is just minor (30 sccm), and the coating easily falls off during the friction process. When the flow rate is 40~60 sccm, the coating grows uniformly, the hardness reaches 7.85 GPa at 50 sccm, and the wear rate is only 4.42 × 10−7 mm3 N−1 m−1 at 60 sccm. The coating doped with Ce and Ti is an approximate amorphous structure. Under appropriate gas flow rate conditions, the friction induces a transfer film with a layered structure, and the MoS2 (002) crystal plane orientation is arranged in parallel at the edge of the wear debris, effectively reducing the shear force during sliding and reducing wear. Based on rare earth doping, this study improves the tribological properties by optimizing the working gas parameters, which plays a reference role in preparing high-quality MoS2-based coatings.

show abstract

Nanoscale contact mechanics of the interactions at monolayer MoS2 interfaces with Au and Si

Cited by 13 publications

References 79 publications

Atomic Friction Processes of Two-Dimensional Materials

Atomic Friction Processes of Two-Dimensional Materials

Impact of MoS₂ Monolayers on the Thermoelastic Response of Silicon Heterostructures

Effect of Argon Flow Rate on Tribological Properties of Rare Earth Ce Doped MoS2 Based Composite Coatings by Magnetron Sputtering

Contact Info

Product

Resources

About

Nanoscale contact mechanics of the interactions at monolayer MoS2 interfaces with Au and Si

Cited by 13 publications

References 79 publications

Atomic Friction Processes of Two-Dimensional Materials

Atomic Friction Processes of Two-Dimensional Materials

Impact of MoS2 Monolayers on the Thermoelastic Response of Silicon Heterostructures

Effect of Argon Flow Rate on Tribological Properties of Rare Earth Ce Doped MoS2 Based Composite Coatings by Magnetron Sputtering

Contact Info

Product

Resources

About

Impact of MoS₂ Monolayers on the Thermoelastic Response of Silicon Heterostructures