منابع مشابه
Rapid epitaxy-free graphene synthesis on silicidated polycrystalline platinum
Large-area synthesis of high-quality graphene by chemical vapour deposition on metallic substrates requires polishing or substrate grain enlargement followed by a lengthy growth period. Here we demonstrate a novel substrate processing method for facile synthesis of mm-sized, single-crystal graphene by coating polycrystalline platinum foils with a silicon-containing film. The film reacts with pl...
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متن کاملNondestructive Testing of Polycrystalline Silicon Substrates by Millimeter Waves
A technique for nondestructive detection of small cracks in polycrystalline silicon substrates used for solar cells was demonstrated. A millimeter wave signal of 110 GHz was used and the amplitude of the reflection coefficient was measured. To increase the testing speed, a slit aperture sensor was used. The crack was detected effectively, while the testing speed was 50×35 mm/s. The experimental...
متن کاملDirect lateral epitaxy overgrowth of GaN on sapphire substrates based on a sparse GaN nucleation technique
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ژورنال
عنوان ژورنال: Science
سال: 2017
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aao1293