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Stable, sharp-bandwidth and upconverted stimulated emissions are generated from a 5-μm polystyrene cavity pumped by a low-power continuous-wave excitation.
A volatile memory built by assembly of layered semiconductors into a van der Waals heterostructure gives longer refresh times and an opportunity to improve energy efficiency.
RNA polymerase-based nanomotors can not only rotate a supramolecular wheel, but can also walk along a predefined linear track — autonomously and unidirectionally.