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Programmable metasurfaces can be used for wireless attacks at the physical layer, highlighting potential security threats for next-generation wireless networks.
Piezoelectric transducers based on ferroelectric hafnia–zirconia–alumina can be used to create nanoelectromechanical resonators that operate between 0.4 and 17.3 GHz and have an on/off isolation of 37 dB.
A wearable sweat sensor powered by a flexible solar cell can continuously collect multimodal physicochemical data—glucose, pH, sodium ion, sweat rate and skin temperature—across indoor and outdoor physical activities for over 12 h.
Aligned carbon nanotubes can be used to create six-transistor static random-access memory cells with an area of less than 1 μm2 and performance superior to cells made using 90-nm-node silicon transistors, as well as field-effect transistors with scaled contacted gate pitch comparable with the 10 nm silicon technology node.
Metadevices that are based on quasi-one-dimensional surface plasmon polariton structures can offer optical and radiofrequency transparency, and can be used to create a wireless communication scheme for image transfer.
Millimetre-scale meron lattices that are stable at room temperature and under zero magnetic field can be used as spin injectors in light-emitting diodes, providing 22.5% circularly polarized electroluminescence.
A non-volatile compute-in-memory macro that is based on spin-transfer torque magnetic random-access memory can offer secure access control, data protection, rapid response times and high energy efficiency for dot-product edge computing.
A scanning tunnelling microscope, operating on an insulating substrate, can be used to perform spatially resolved wavefunction spectroscopy and local gate control of a quantum dot device consisting of phosphorus atoms in silicon.
Strontium titanate two-dimensional electron gas channels that have a thin hafnium oxide barrier layer between the channel and an ionic liquid gate can have ballistic constrictions and clean normal-state conductance quantization.
The magnetic state of twisted double bilayers of antiferromagnetic chromium triiodide can be controlled by electrical gating, twist angle and temperature.
Antiferromagnetism of the IrMn layer in Pt/IrMn/CoFeB/MgO/CoFeB three-terminal magnetic tunnel junctions can be electrically detected using tunnelling magnetoresistance and controlled by a spin–orbit torque generated by a 0.8 ns current pulse applied across the heavy-metal platinum layer.
Arrays of thin-film transistors can be fabricated on the 5-inch wafer scale using solution-based processing of molybdenum disulfide and sodium-embedded alumina inks for the semiconductor and gate dielectric, respectively, yielding devices with room-temperature mobilities of up to 80 cm2 V−1 s−1.
An elastomer–semiconductor–elastomer stack structure can allow an intrinsically brittle n-type organic semiconductor to be stretched by 50% and used to make fully stretchable complementary electronics.
A parallel in-memory wireless computing scheme that is based on memristive crossbar arrays can provide energy-efficient wireless data transmission using radio, acoustic and light waves.
Ferroelectric zirconium-doped hafnia (Hf0.5Zr0.5O2) can be used to create negative differential capacitance behaviour in capacitors and transistor gate stacks, providing reliable enhancements in switching performance.
A microelectromechanical cochlea, which consists of a bio-inspired acoustic sensor with a thermo-mechanical feedback mechanism, exhibits active auditory sensing, allowing the sensor to adapt its properties to different acoustic environments.
An organic electrochemical transistor with a vertical traverse architecture and a crystalline–amorphous channel that can be selectively doped by ions can operate as a volatile receptor and a non-volatile synapse.
Incorporation of the alkali metal salt caesium chloride into a hole injection layer can improve the efficiency of charge carrier injection and induce the growth of quasi-two-dimensional perovskite layers with improved emissive properties, resulting in blue perovskite light-emitting diodes with an external quantum efficiency of up to 16.1%.
Soft, conductive fibres that can be used to make electronic textiles can be fabricated at ambient pressure and temperature using a supramolecular-network-structured solution via a spontaneous phase separation technique that mimics spider silk formation.