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Graphene and silk combine to make self-healable, multifunctional electronic tattoos

Electronic tattoos (e-tattoos) are an extremely thin form of wearable electronics. They are lightweight and soft, which allows them to be intimately mounted on human skin for noninvasive, high-fidelity sensing. During the operation of e-tattoos, they are constantly exposed to external mechanical inputs such as bending, twisting, pressing, and cutting, which may cause mechanical damage and lead to malfunction. Now, researchers have demonstrated a self-healing silk e-tattoo that shows high sensitivity to multiple stimuli, including strain, humidity, and temperature based on a unique graphene, silk fibroin, Ca2+ combination.

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New graphene-based device is first step toward ultrasensitive biosensors

Device could detect disease biomarkers at the molecular level and lead to new sensor technology.

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Smoothing out the wrinkles in graphene

Coating graphene with wax makes for a less contaminated surface during device manufacturing.

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Squeezing strong correlations from graphene

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Upping the pressure in bilayer graphene

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Tuning superconductivity in twisted bilayer graphene

Materials with flat electronic bands often exhibit exotic quantum phenomena owing to strong correlations. An isolated low-energy flat band can be induced in bilayer graphene by simply rotating the layers by 1.1°, resulting in the appearance of gate-tunable superconducting and correlated insulating phases. In this study, we demonstrate that in addition to the twist angle, the interlayer coupling can be varied to precisely tune these phases. We induce superconductivity at a twist angle larger than 1.1°—in which correlated phases are otherwise absent—by varying the interlayer spacing with hydrostatic pressure. Our low-disorder devices reveal details about the superconducting phase diagram and its relationship to the nearby insulator. Our results demonstrate twisted bilayer graphene to be a distinctively tunable platform for exploring correlated states.

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The moiré patterns of three layers change the electronic properties of graphene

Combining an atomically thin graphene and a boron nitride layer at a slightly rotated angle changes their electrical properties. Physicists have now shown for the first time the combination with a third layer can result in new material properties also in a three-layer sandwich of carbon and boron nitride. This significantly increases the number of potential synthetic materials.

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[ASAP] New Generation of Moiré Superlattices in Doubly Aligned hBN/Graphene/hBN Heterostructures

TOC Graphic

Nano Letters
DOI: 10.1021/acs.nanolett.8b05061

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Graphene quantum dots for single electron transistors

Scientists have developed a novel technology, which combines the fabrication procedures of planar and vertical heterostructures in order to assemble graphene-based single-electron transistors of excellent quality.

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1 + 1 does not equal 2 for graphene-like 2D materials

Physicists have discovered that when two atomically thin graphene-like materials are placed on top of each other their properties change, and a material with novel hybrid properties emerges, paving the way for design of new materials and nano-devices.

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