Enabling ultra-low-voltage switching in BaTiO₃

Nature Materials, Published online: 26 May 2022; doi:10.1038/s41563-022-01266-6Thin films of BaTiO3 do not possess the same small switching fields and energies as the single-crystal form, hindering applications. Here, thin films are synthesized that enable switching for voltages

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Porosity-based heterojunctions enable leadless optoelectronic modulation of tissues

Nature Materials, Published online: 26 May 2022; doi:10.1038/s41563-022-01249-7Fabrication of semiconductor heterojunctions typically involves a complex process and often leads to bioincompatibility. Here, the authors propose a porous heterojunction in p-type silicon via simple stain etching at ambient conditions, and apply it in optically induced biomodulation.

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Bringing some bulk into ferroelectric devices

Nature Materials, Published online: 26 May 2022; doi:10.1038/s41563-022-01267-5Sub-100-mV switching at the nanosecond timescale is achieved in ferroelectric devices by approaching bulk-like perfection in prototypical BaTiO3 thin films.

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Wireless neuromodulation with porous silicon

Nature Materials, Published online: 26 May 2022; doi:10.1038/s41563-022-01257-7Wireless optoelectronic devices are fabricated by controlling the porosity of p-type silicon, enabling in vivo efficient, non-genetic optoelectronic modulation of peripheral nerve activity.

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Long-term solar water and CO₂ splitting with photoelectrochemical BiOI–BiVO₄ tandems

Nature Materials, Published online: 26 May 2022; doi:10.1038/s41563-022-01262-wPhotoelectrochemical devices are used for direct solar fuel production, but the stability of light absorbers can hamper their commercial prospects. Integrating a BiOI light absorber into a robust oxide-based architecture with a graphite paste conductive encapsulant results...

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Solid–liquid–gas reaction accelerated by gas molecule tunnelling-like effect

Nature Materials, Published online: 26 May 2022; doi:10.1038/s41563-022-01261-xReal-time imaging of accelerated solid–liquid–gas reactions with nanobubbles uncovers the mechanisms of enhanced triple-phase reactions by identifying the critical distance between solid and gas at the nanoscale.

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3D printed protein-based robotic structures actuated by molecular motor assemblies

Nature Materials, Published online: 26 May 2022; doi:10.1038/s41563-022-01258-6Three-dimensional printed protein-based robotic structures are actuated by exoskeleton-like coats of molecular motor assemblies upon the spatially targeted release of chemical fuel, resulting in micrometre-scale shape-morphing activity.

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Wireless neuromodulation with porous silicon

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Bringing some bulk into ferroelectric devices

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Solid–liquid–gas reaction accelerated by gas molecule tunnelling-like effect

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