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Arrays of "Topological Insulators": a Step Towards Exotic Electronics 15

LilaG writes with a paragraph from Chemical & Engineering news: "Chemists in China have precisely grown arrays of ultrathin flakes of bismuth selenide and bismuth telluride on a surface. The bismuth compounds belong to a recently discovered – and weird — class of materials called topological insulators, which conduct electrons only along their surfaces, not through their insides. Researchers think topological insulators promise a new realm of fast, energy-efficient electronic and spintronic devices. Making well-defined nanoparticle arrays such as the new study's flakes is a key step towards such devices."
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Arrays of "Topological Insulators": a Step Towards Exotic Electronics

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Whom the gods would destroy, they first teach BASIC.