Developing wafer-scale highly oriented graphene on sapphire

Mechanism of alignment of graphene domains on Al2O3 (0001) substrate.(A) The schematic of the homemade induction heating CVD reactor, where sapphire substrate is directly placed on the graphite carrier that is surrounded with induction coil. (B and C) The simulated temperature distribution of the induction heating cold wall CVD system (at 1400°C, 2000 Pa) (B)… Continue reading Developing wafer-scale highly oriented graphene on sapphire

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Development of polyimide-mica nanocomposite film with high resistance to low-Earth-orbit environments

Fabrication of the double-layer nacre-inspired film. Credit: Pan Xiaofeng et al. Polyimide (PI) composite films are widely used on the external surfaces of spacecraft to protect them from the adverse environments of low Earth orbit (LEO) due to their outstanding comprehensive performance. However, current PI composite films have inadequate mechanical properties and atomic oxygen (AO)… Continue reading Development of polyimide-mica nanocomposite film with high resistance to low-Earth-orbit environments

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Researchers develop nanometer-scale adaptive transistor

In addition to the usual control gate (red) there is also a program gate (blue). Credit: Vienna University of Technology Normally, computer chips consist of electronic components that always do the same thing. In the future, however, more flexibility will be possible: New types of adaptive transistors can be switched in a flash, so that… Continue reading Researchers develop nanometer-scale adaptive transistor

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Alternative negative weight for simpler hardware implementation of synapse device based neuromorphic system

To realize the DNN, the VMM is necessary, as shown in Fig. 1a. Therefore, in the H-DNN, arrays of synapse device are utilized as the VMM. However, the negative weight can not be implemented efficiently because the conductance of synapse device is always a positive value (Fig. 1b). In other words, the S-DNN has both… Continue reading Alternative negative weight for simpler hardware implementation of synapse device based neuromorphic system

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In-plane magnetic field-driven symmetry breaking in topological insulator-based three-terminal junctions

Magnetoconductance properties Low temperature magnetotransport measurements were performed on a T-shaped tri-junction. The sample is composed of a Bi2Te3 film at an average thickness of 14 nm that is grown selectively and capped with AlOx (see Fig. 1a for layout and “Methods” section for details on growth and fabrication). The electron phase-coherence length below T = 1 K was determined… Continue reading In-plane magnetic field-driven symmetry breaking in topological insulator-based three-terminal junctions

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Shrinking qubits for quantum computing with atom-thin materials

Optical micrograph of the team’s superconducting qubit chip that is 1000 times smaller than others made with conventional fabrication techniques. Credit: Abhinandan Antony / Columbia Engineering For quantum computers to surpass their classical counterparts in speed and capacity, their qubits—which are superconducting circuits that can exist in an infinite combination of binary states—need to be… Continue reading Shrinking qubits for quantum computing with atom-thin materials

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Flu virus shells could improve delivery of mRNA into cells

Illustration of flu virus-mimicking nanoparticle entering and releasing mRNA into a host cell (top). A special protein on the nanoparticle’s surface triggers it to fuse with the endosomal membrane, allowing its mRNA cargo to safely escape into the host cell (bottom). Credit: Angewandte Chemie International Edition Nanoengineers at the University of California San Diego have… Continue reading Flu virus shells could improve delivery of mRNA into cells

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A retina-inspired device that can detect and recognize movements in the environment

Illustration of the motion detection procedure based on inter-frame differential computation. (1) First, the team developed the retinomorphic devices with non-volatile positive and negative photoconductivity and experimentally record positive and negative response parameters of the devices; (2) the device parameters are used to construct m×n positive and negative photoconductivity matrices. And we set a suitable… Continue reading A retina-inspired device that can detect and recognize movements in the environment

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Preparation and recycling property of nanofiber-reinforced polystyrene molded product using the emulsion-forming ability of chitin nanofibers

1. Ifuku S, Nogi M, Abe K, Yoshioka M, Morimoto M, Saimoto H, et al. Preparation of chitin nanofibers with a uniform width as α-chitin from crab shells. Biomacromol. 2009;10:1584–8. CAS  Article  Google Scholar  2. Das P, Heuser T, Wolf A, Zhu B, Demco DE, Ifuku S, et al. Tough and catalytically active hybrid biofibers… Continue reading Preparation and recycling property of nanofiber-reinforced polystyrene molded product using the emulsion-forming ability of chitin nanofibers

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Author Correction: Slow light nanocoatings for ultrashort pulse compression

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.… Continue reading Author Correction: Slow light nanocoatings for ultrashort pulse compression

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