Nanotribology of transition metal dichalcogenide flakes deposited by chemical vapour deposition: The influence of chemical composition and sliding speed on nanoscale friction of monolayers

Correlation between morphology and local mechanical and electrical properties of van der Waals heterostructures

“…Excellent rectifying properties, high photo-responsitivity [53] and large surface photovoltage [54] make them good candidates for photodetection [55][56][57][58]. Besides interesting optoelectronic properties, MoS 2 and WS 2 are TMDs with excellent elastic [59] and frictional properties [60,61] as well. Optical properties and absorption of these heterostructures strongly depend on the interlayer coupling and charger transfer between constituent layers [62][63][64].…”

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

“…The COF for the aged sample (∼0.16) in the wrinkle-free region is noticeably higher than that for the freshly grown WS 2 monolayer samples. 19 This increase in COF is due to the chemical changes over the aged monolayer. A similar phenomenon of high friction on chemically modified graphene has been observed.…”

“…Even at a load of 10 μN, no wear was evident on the WS 2 monolayer; however, a pre-worn tip was employed to conduct the experiments. 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.…”

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

“…Furthermore, previous studies have highlighted the exceptional tribological properties of TMDs, positioning them as attractive materials for various tribological applications. [12][13][14] Rapuc et al conducted research on the frictional properties of monolayer TMDs at the nanoscale and observed that TMDs were capable of effectively minimizing wear, even when subjected to substantial loads. Notably, even at a load of 10 µN, no signs of wear were observed on the WS 2 monolayer.…”