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Freestanding, out-of-plane structures made of stretchable conductors can be printed using an emulsion-based ink that has the viscoelasticity to be extruded into three-dimensional geometries and supporting its own shape.
A spoof surface plasmon polariton platform can be used to create a surface plasmonic neural network with programmable weights and activation functions.
Oxide-based solid-state protonic electrochemical transistors that have symmetric operation and are compatible with CMOS technology can be used to create crossbar arrays for deep learning applications.
A millimetre-wave dual-rail resonator that is incorporated into a suspended lithium niobate resonator can provide efficient electromechanical transduction in the sub-terahertz regime.
The Curie temperature of Fe5+xGeTe2 thin films can be modulated from 260 to 380 K via iron doping, allowing the two-dimensional material to be used to create planar spiral inductors and low-pass Butterworth filters.
Magnetic meta-atoms made from lanthanum-doped barium hexaferrite can be used to create self-biased non-reciprocal metasurfaces capable of unidirectional transmission, non-reciprocal beam steering, non-reciprocal beam focusing and non-reciprocal holography.
An organogel that is based on poly(vinyl alcohol)–sodium borate and contains a percolating conductive network of silver particles and liquid metal microdroplets exhibits spontaneous mechanical and electrical self-healing, as well as an electrical conductivity of 7 × 104 S m−1.
Magnetic hysteresis in multiferroic heterostructures formed from the two-dimensional magnetic insulator chromium germanium telluride and a thin ferroelectric polymer can be electrically controlled with voltages of around 5 V.
Low-loss superconducting aluminium cables and on-chip impedance transformers can be used to link qubit modules and create superconducting quantum computing networks with high-fidelity intermodule state transfer.
Wireless ingestible microdevices can be tracked through the gastrointestinal tract of large animals in real time and with millimetre-scale spatial resolution by generating three-dimensional magnetic field gradients in the gastrointestinal field-of-view using high-efficiency planar electromagnetic coils, which encode each spatial point with a distinct magnetic field magnitude.
Multilayers of hexagonal boron nitride can be grown using a chemical vapour deposition process on iron–nickel foil and integrated into a large array of graphene devices that exhibit room-temperature carrier mobilities of up to around 10,000 cm2 V−1 s−1.
A thin and stretchable polymer layer can be fabricated over large areas with high uniformity using a vacuum-deposition method and used as the gate dielectric in stretchy carbon-nanotube-based transistors and circuits that can function at 40% strain.
Three-dimensional liquid metal structures can be created by manipulating ductile gallium–indium alloy wires that are then encapsulated in an elastomer and heated to recover their fluidity, and can remain in a liquid state for a range of temperatures due to a supercooling effect.
By engineering the upper and lower surfaces of micro-light-emitting-diode chips to have different van der Waals forces, hundreds and thousands of chips can be accurately aligned on substrates and used to create active-matrix displays.
Three-layer heterostructures consisting of an indium gallium arsenide semiconducting film, a lithium niobate piezoelectric film, and a silicon substrate can be used to create acoustoelectric amplifiers that operate at gigahertz frequencies with large non-reciprocal gain and low noise in continuous operation.