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Moiré superlattices formed from semiconducting transition metal dichalcogenides have become an exciting platform for visualizing Hubbard physics in hybrid fermionic and bosonic systems.
The authors image non-equilibrium exciton phase-transition dynamics in moiré superlattices, revealing how strong long-range dipolar repulsion freezes the motion of the Mott insulator over a timescale of tens of nanoseconds.
A low-dose, single-exposure electron diffraction approach is used to reveal the dislocation character and operative slip systems in beam-sensitive molecular crystals.
Predictive electrocatalyst design is challenged by uncontrollable precatalyst reconstruction during operation. Here, informed by operando spectroscopies, activation protocols are developed to stabilize surfaces and improve catalyst reliability.
Lipid nanoparticles containing brush-shaped polymer lipids as a replacement for commonly used PEGylated lipids enable the repeated administration of mRNA therapeutics without any loss of performance in protein replacement therapy and genome editing models.
Weak bonds enable self-strengthening in polymers by triggering mechanochemical reactions during deformation, forming new networks that enhance strength and crack resistance. This rate-dependent process allows custom design of tough polymers.
The authors demonstrate a chemopiezoelectric effect in which the displacive migration of oxygen vacancies driven by an electric field induces a large strain in the surface layer of thin (K,Na)NbO3 ceramics. They achieve an electrostrain of 1.9% under a field of −3 kV mm−1, with thermal stability up to 200 °C.
A soft plastic replication process akin to the fabrication of compact discs enables the fabrication of achromatic metalenses suitable for the mass production of holographic near-eye displays.
A tactile visual artificial synapse provides a route for in situ health monitoring. Here the authors report an electrochemical transistor comprising a top gate as a tactile receptor and a light-emitting ion gel layer stacked on a polymeric semiconductor to monitor finger motions and heartbeats.
Intradermal microneedles for the co-delivery of mRNA and near-infrared fluorescent microparticles are used in combination with deep learning-based image analysis for the simultaneous administration of therapeutics and registry of patient information records into the skin.
Using a topological inverse design process with finite-difference time-domain simulations, the authors fabricate high-numerical-aperture red, green and blue achromatic metalenses for compact near-eye displays using a scalable roll-to-plate technique.
A method is reported to create chiral rolls from two-dimensional atomic layers such as graphene with controlled rolling angles, which show optical activity and spin-selective transport dependent on the chiral lattice structures.
Elasticity is ubiquitous in everyday life, but the molecular origin of the restoring force remains elusive. Here the authors use a series of density functional theory calculations to understand how interaction energies change as a result of the bending of molecular crystals.
A wax-aided immersion methodology is developed to yield graphene rolls with tunable chiral angles; these graphene rolls exhibit promising chiral electronic properties beyond those of other carbon allotropes.
Antiferromagnetic order blocks interlayer hopping of electron–hole pairs in a two-dimensional magnetic semiconductor, leading to the formation of a type of optical excitation — magnetic surface excitons — with quasi-one-dimensional quantum confinement.
The emergence of magnetically confined surface excitons enabled by antiferromagnetic spin correlations is reported, which leads to the confinement of excitons to the surface of layered antiferromagnet CrSBr.
The antiferromagnetic-to-paramagnetic phase transition in a two-dimensional semiconducting magnet, CrSBr, induces an exciton confinement transition from a strongly bound quasi-one-dimensional state to a weakly bound interlayer-delocalized state.
