Qunyang Li

TL;DR: In this article, the authors compared the nanoscale frictional characteristics of atomically thin sheets of graphene, molybdenum disulfide (MoS2), niobium diselenide, and hexagonal boron nitride exfoliated onto a weakly adherent substrate (silicon oxide) to those of their bulk counterparts.

TL;DR: Atomistic simulations reproduce the experimental observations of layer-dependent friction and transient frictional strengthening on graphene and reveal that the evolution of static friction is a manifestation of the natural tendency for thinner and less-constrained graphene to re-adjust its configuration as a direct consequence of its greater flexibility.

TL;DR: The epitaxial growth of large single-crystal hexagonal boron nitride monolayers on low-symmetry copper foils is demonstrated and is expected to facilitate the wide application of 2D devices and lead to the epitaxials growth of broad non-centrosymmetric 2D materials, such as various transition-metal dichalcogenides20–23, to produce large single crystals.

TL;DR: In this article, the elastic properties and frictional properties of graphene samples of varying thickness using an atomic force microscope were investigated for tensile testing, and it was shown that the frictional force between an AFM tip and graphene decreases with thickness for samples from 1 to 4 layers, and does not depend on the presence of a substrate.

TL;DR: A facile approach is demonstrated to generate atomically dispersed platinum via photochemical reduction of frozen chloroplatinic acid solution using ultraviolet light to obtain atomically-dispersed platinum catalysts with high electrocatalytic performance.