Volume 21 Issue 11, November 2022

Twisted bilayer graphene is epitaxially grown between two adjacent Cu(111) surfaces, with the twist angle controlled by the rotation of the Cu foils as designed.

Two-dimensional electrons on the surface of an electride are found to exhibit a phase transition from a normal Fermi liquid to an interesting quantum liquid, which is probably a quantum version of an electronic crystal beyond the melting point.

Ensemble-level experimental evidence of exciton fine-structure splitting in perovskite quantum dots has been demonstrated, correlated to the intrinsic symmetry of these nanocrystals.

Engineering inter-triplet exchange coupling allows spin mixing between singlet and quintet manifolds in triplet–triplet pair states in metal–organic frameworks, demonstrating increased room-temperature triplet-fusion rates under relatively small applied magnetic fields.

Additive manufacturing imparts defects in as-built titanium alloy microstructures, which form internally twinned nanoprecipitates with heat treatment to yield attractive mechanical properties.

This Review discusses the progress in and potential pathways for incorporating two-dimensional materials into silicon platforms, from integrated devices to monolithic circuits.

The existence of fast dynamics in glass solids at low temperatures is attributed to liquid-like atoms that are inherited from high-temperature liquids and exhibit behaviour similar to that of atoms in liquid states.

The authors realize local and reversible hydrogenation of VO₂ using a Pt-coated scanning probe microscope tip and forming gas.

Negative capacitance (NC) is a promising route towards low-power electronics. Here, a theory clarifying the connection between NC and voltage amplification is presented, and it is predicted that incipient ferroelectric states that do not necessarily maximize NC can result in a tenfold voltage amplification.

Laser additive manufacturing can be exploited to generate unique internally twinned nanoprecipitates in commercial titanium alloys, paving the way to fabricate ultrastrong metallic materials with intricate shapes for broad applications.

Angle tunability in twisted bilayer graphene is crucial in promoting its applications of twistronics. Here an angle replication strategy is developed to obtain centimetre-scale bilayer graphene with arbitrary twist angles.

A purely quantum electronic liquid on the surface of an electride crystal is reported.

Triplet-fusion-based photon upconversion is promising for photovoltaic or bioimaging applications, but its efficiency is limited by triplet fusion spin dependence. Here, the authors tailor spin dynamics by engineering the crystal structure with metal–organic frameworks to enable effective spin mixing between singlet and quintet triplet–triplet pair states.

Halide perovskites feature highly dynamic lattices, but their impact on exciton fine structure remains unexplored. Here, the authors show that these lattices lead to a bright-exciton fine structure gap, enabling observation of quantum beats in a non-uniform ensemble.

Nanoparticle catalysts can be highly active, but are susceptible to deactivation due to sintering under operational conditions. The Pt and Pd–Pt catalysts synthesized here are stable under demanding reaction conditions with temperatures as high as 1,100 °C.

Understanding and mitigating filament formation, short-circuit and solid electrolyte fracture is necessary for advanced all-solid-state batteries. The effect of polymorphism on the grain-level chemo-mechanical behaviour of dense and polycrystalline garnet solid electrolytes is now investigated.

Understanding the ion intercalation and degradation mechanisms occurring during realistic battery operation is crucial to developing high-rate battery electrodes. Operando optical scattering microscopy is now used to study single-particle kinetic state-of-charge heterogeneities and cracking in high-rate Li-ion anode materials.

Collective cell migration in embryonic tissues is triggered by cell softening due to a microtubule deacetylation pathway involving the mechanosensitive ion channel Piezo1.

Biohybrid microrobots consisting of nanoparticle-modified microalgae are constructed for active drug delivery in the lungs. In an acute bacterial pneumonia model, the microrobots effectively reduce bacterial burden and lessen animal mortality.