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Spectral processors for wireless communication can be created using acoustic resonators made from 3D silicon nano-fins with hafnia–zirconia ferroelectric gates wrapped around them. The scanning electron microscopy image on the cover shows an array of filters created by electrically coupling 3D resonators with different frequencies, with the different devices highlighted by different false colours.
Tapes whose adhesive force is controlled by ultraviolet illumination can be used to cleanly transfer large-area graphene, molybdenum disulfide and other two-dimensional materials with a low thermal budget and using no organic solvents.
The planar structure of thin-film piezoelectric resonators limits the integration of multiband processors on a single chip. A three-dimensional nanomechanical resonator based on conformal ferroelectric gates to excite resonance in scalable silicon fins is shown to enable multiband integration on a single chip and to facilitate densification of processors for ultrawide-band wireless communication.
This Review explores the development of ingestible electronics and provides a step-by-step guide for the design of ingestible electronic capsules at the system level.
Large-area two-dimensional materials can be transferred at low temperatures and without solvents using conformable tapes whose adhesive force varies with ultraviolet illumination, allowing transfer to various planar and non-planar substrates.
Through layer-by-layer mechanical peeling, the channel region of a multilayer black phosphorus transistor can be reduced to a monolayer thickness without degrading its lattice and while retaining a multilayer contact region.
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.
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 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.