Spatial variation in nanoscale wear behavior of chemical vapor deposited monolayer WS2

Nanoscale friction and wear behavior of a CVD-grown aged WS2 monolayer: the role of wrinkles and surface chemistry

“…However, the density of wrinkles was negligible in the freshly grown sample as we did not observe wrinkles in our earlier work. 20 The formation of wrinkles increased considerably over time in the aged sample, as observed in the AFM images shown in Fig. 2.…”

“…19 Rai et al explored the nanoscale wear behavior of a CVD-grown WS 2 monolayer and observed that the spatial variation in the load-carrying capacity between the interior and the edge was attributed to the number of defects. 20 Despite several studies on the tribological behavior of TMDs, the studies on the nanoscale friction and wear behavior of TMDs are very limited and require significant attention.…”

Large-scale synthesis of defect-free phosphorene on nickel substrates: enabling atomistic thickness devices

“…Ni-P interaction refers to the interaction between the substrate and the grown phosphorene layer. As this is a weak interaction it can be accurately described by the L-J potential and reproduce well the basic phenomenon [24][25][26]. The 12-6 L-J was also chosen to describe the Ni-Ni interaction because it was shown by Kanhaiya et al that the 9-6 and 12-6 L-J potential can replicate well the lattice constants, surface energies, water interface, and interaction with (bio)organics molecules with 0.1%-5% agreement with experimental data [30].…”

“…Overcoming these hurdles requires the crucial incorporation of molecular dynamics (MD). By employing detailed computer simulations, MD provides a means to predict and understand complex molecular interactions, [24][25][26] optimizing CVD growth parameters for phosphorene synthesis. This ensures a more reliable and reproducible production of this promising 2D material.…”

Transforming friction: unveiling sliding-induced phase transitions in CVD-grown WS2 monolayers under single-asperity sliding nanocontacts

“…The results of the experiments and simulations revealed that, when subjected to identical conditions, MoTe 2 displayed the lowest friction behavior. 13 Rai et al observed the improved wear resistance for the chemical vapor deposited (CVD) WS 2 monolayer flakes within the interior (step free) region; 15 however, wear resistance reduced significantly in the aged samples in the presence of wrinkles due to the stress concentration near the wrinkles. 16 Despite various tribological studies, the understanding of correlation between frictional properties and phase transitions in TMDs is limited.…”