Qunyang Li

TL;DR: In this paper, the authors reported an unusual moire superlattice-level stick-slip instability on monolayer graphene epitaxially grown on Ru(0 0 0 0 1) substrate.

TL;DR: The frictional behavior of water droplets sliding on superhydrophobic surfaces decorated with micropillar arrays was studied using a nanotribometer and found that the sliding friction of droplets was enhanced when the dimension of the microstructures increased, showing a distinct size effect.

TL;DR: In this paper, a molecular dynamics simulation is carried out to examine the possible mechanisms that could contribute to friction enhancement on chemically modified and/or vacancy-contained graphene, and it is found that the change in out-of-plane flexibility due to vacancies has only a limited influence on friction.

TL;DR: In this article, the contact stiffness of hexagonally patterned multi-asperity interfaces is studied using a discrete asperity model, and the authors confirm that the elastic interaction among asperities is critical in determining the mechanical behavior of rough contact interfaces.

TL;DR: Osteoblast functions (including adhesion, proliferation, and differentiation) on two carefully-fabricated diamond films with dramatically-different topographies were tested and modeled and the results suggested that increasing the lateral dimensions or height of nanometer surface features could inhibit cell filopodia extension and, ultimately, decrease cell spreading.