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Hydrogenated amorphous carbon is a promising solid lubricant, but the underlying mechanisms surrounding its superlubricity remain unclear. Here the authors reveal that the attainment of a superlubricious state is dependent on the in-situin-situ formation of a nanostructured tribolayer through different carbon rehybridization pathways.
Deformation-induced defects with high formation energy are difficult to nucleate in aluminium. Here, the authors use a miniaturized projectile impact to nucleate the high stacking fault energy 9R phase in a thin film of ultrafine-grained aluminium, and show sessile Frank loops stabilize it.
The efficiencies of materials-based catalysts are determined by the surface atomic and electronic structures, but harnessing this relationship can be challenging. Here, by engineering strain into cobalt oxide, the authors transform a once poor hydrogen evolution catalyst into one that is competitive with the state of the art.
Non-covalent interactions can organize planar molecules into two-dimensional arrays. It has now been shown that such arrays can be combined at the solid–liquid interface into bilayered heterostructures.