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Understanding reversible anionic redox reactions is key to designing high-energy-density cathodes for lithium-ion batteries. Anionic redox activation in cation-disordered rock-salt Li1.17Ti0.58Ni0.25O2 is shown to involve intermediate Ni3+/4+ species that can evolve to Ni2+ during relaxation.
The authors use scanning tunnelling microscopy and spectroscopy to visualize the electronic structure of mirror twin boundaries, revealing a Tomonaga–Luttinger liquid.
The authors show that an out-of-plane antidamping spin–orbit torque can produce a sizeable change in the switching dynamics of a magnetic layer with perpendicular anisotropy.
Distinct electronic and optical properties emerge from quantum confinement in low-dimensional materials. Here, combining optical characterization and ab initio calculations, the authors report an unconventional excitonic state and bound phonon sideband in layered silicon diphosphide.
A design paradigm to create robust robotic metamaterials using versatile gear clusters is demonstrated. It enables intriguing programmability of elastic properties and shape while preserving stability for intelligent machines.
The realization of large-scale exciton–polariton platforms operating at room temperature and exhibiting long-lived, strongly interacting excitons has been elusive. Here, the authors demonstrate a room-temperature perovskite-based polaritonic platform with a polariton lattice size of up to 10 × 10.
Electrostatic capacitors can enable ultrafast energy storage and release, but advances in energy density and efficiency need to be made. Here, by doping equimolar Zr, Hf and Sn into Bi4Ti3O12 thin films, a high-entropy stabilized Bi2Ti2O7 pyrochlore phase forms with an energy density of 182 J cm−3 and 78% efficiency.
Here the authors fabricate a fibre-coupled electrode ‘fibertrode’ that integrates light emission sites and platinum microelectrodes on tapered optical fibre neural implants, for combined stimulation and recording of neural activity over small brain volumes in vivo with reduced photoelectric artefacts.
The growth of lithium dendrites across electrolyte layers limits the practical viability of solid-state Li-ion batteries. A direct correlation between void formation and lithium dendrite growth in solid-state electrolytes with metallic interlayers is now observed.
The cycling disordering–ordering transition of low-misfit superlattice nanoprecipitates in metallic materials continuously annihilates radiation defects via a short-range atom-reshuffling process, giving rise to high radiation tolerance.
The performance of organic optoelectronic and energy-harvesting devices is largely dictated by molecular orientation and resultant permanent dipole moment. Here, the authors demonstrate a strategy to actively control dipole direction in organic glassy films.
Photoelectrochemical devices are used for direct solar fuel production, but the stability of light absorbers can hamper their commercial prospects. Integrating a BiOI light absorber into a robust oxide-based architecture with a graphite paste conductive encapsulant results in photocathodes with long-term H2 evolution activity.
Three-dimensional printed protein-based robotic structures are actuated by exoskeleton-like coats of molecular motor assemblies upon the spatially targeted release of chemical fuel, resulting in micrometre-scale shape-morphing activity.
Fabrication of semiconductor heterojunctions typically involves a complex process and often leads to bioincompatibility. Here, the authors propose a porous heterojunction in p-type silicon via simple stain etching at ambient conditions, and apply it in optically induced biomodulation.
Real-time imaging of accelerated solid–liquid–gas reactions with nanobubbles uncovers the mechanisms of enhanced triple-phase reactions by identifying the critical distance between solid and gas at the nanoscale.
Thin films of BaTiO3 do not possess the same small switching fields and energies as the single-crystal form, hindering applications. Here, thin films are synthesized that enable switching for voltages <100 mV and fields <10 kV cm–1, and a pathway to subnanosecond switching is presented.
Single-atom catalysts demonstrate enhanced catalytic properties, but most systems only explore combinations of a few different metals. Here, a library of 37 different elements is investigated, and it is shown that loading 12 metallic atoms in one system presents improved electrochemical activity.
Here the authors investigate lipid nanodiscs as drug carriers for antitumour immunotherapy. They demonstrate that flexible lipid nanodiscs functionalized with STING-activating cyclic dinucleotides exhibit superior tumour penetration and tumour cell uptake compared with spherical liposomes, resulting in improved antitumour T-cell priming and tumour regression.
Extreme mechanical deformation processes can lead to nanograins in many metals, but the underlying mechanism remains unclear. Nanotwinning-assisted dynamic recrystallization is shown to facilitate grain refinement to the nanoscale at high strains and strain rates.