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Polycrystalline thin films of elemental bismuth exhibit a room-temperature nonlinear transverse voltage due to geometric effects of surface electrons that is tunable and can be extended to efficient high-harmonic generation at terahertz frequencies.
An electronic skin that is capable of long-term monitoring of vital signs and molecular biomarkers in sweat can—with the help of machine learning—be used to classify stress responses with high accuracy and predict state anxiety levels with high reliability.
A biomimetic olfactory system that integrates nanotube sensor arrays with up to 10,000 individually addressable sensors per chip can offer high sensitivity to various gases with excellent distinguishability for mixed gases and 24 distinct odours.
An inverter that uses a self-biased molybdenum disulfide homojunction as the load and n-type transistor as the driver can exhibit lower static power than complementary metal–oxide–semiconductor (CMOS) or pseudo-n-type metal–oxide–semiconductor (NMOS) architectures.
An acoustic resonator that uses a three-dimensional silicon fin and an atomic-layered hafnia-zirconia ferroelectric transducer can be integrated into chip-scale filter arrays to make adaptive switch-free spectral processors for wireless communication.