2D or not 2D? The impact of nanoscale roughness and substrate interactions on the tribological properties of graphene and MoS₂

Strain Modulation of Graphene by Nanoscale Substrate Curvatures: A Molecular View

“…Note that a previous study showed similar trends of Raman shifts for graphene on disordered films of SiO 2 nanoparticles. 20 This indicates that, while controllably ordered structures are desired for mechanistic studies, the trend of strain enhancement by smaller substrate radius of curvature is likely a general effect that does not require spatial ordering or periodicity.…”

Iron‐Nanoparticle Driven Tribochemistry Leading to Superlubric Sliding Interfaces

“…[11][12][13][14][15][16][17][18][19] 2D materials such as graphene and molybdenum disulfide are known for their excellent mechanical, electrical and tribological properties. [20,21] However, translating such unique properties of the 2D materials to achieve sustained superlubricity at macroscale is rather challenging [8][9][10] and there is on-going research to achieve macroscale superlubricity that will be long lasting, will work irrespective of environmental conditions, surface roughness, and at higher contact pressures and higher sliding speed without periodic replenishment of the lubricant materials.…”

Modulating Wettability of Layered Materials by Controlling Ligand Polar Headgroup Dynamics

“…While the unusual electronic and mechanical properties of graphene promise substantial benefits to the design of nanoscale device architectures and hybrid materials, processing control remains a substantial barrier in many applications. − Significant challenges arise from the concurrent need to control both the electronic properties of the 2D layer and environmental interactions. Here, we demonstrate that nominally 2D “lying down” phases of diynoic acids commonly used in noncovalent functionalization exhibit headgroup dynamics when exposed to polar solvents.…”