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Sharpness of field emitter tips is one of the key factors to achieve excellent field emission performance. In order to sharpen the tips to atomic scale, a new method combining the bottom-up process of wafer-scale nanopattern formation via self-assembly of diblock copolymer with the top-down process of anisotropic etching of Si followed by nanocasting is developed. Geometrical hindrance in the oxidation...
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