Direct synthesis of silicon nanowires, silica nanospheres, and wire-like nanosphere agglomerates
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Abstract
Elevated temperature synthesis has been used to generate virtually defect free SiO₂sheathed crystalline silicon nanowires and silica (SiO₂) nanospheres which can be agglomerated to wire-like configurations impregnated with crystalline silicon. The SiO₂ passivated (sheathed) crystalline silicon nanowires, generated with a modified approach using a heated Si–SiO₂mix, with their axes parallel to 111 are found to be virtually defect free. Modifications to the system allow the simultaneous formation of SiO₂ nanospheres (d~10–30 nm) as virtually monodisperse gram quantity powders which form large surface area catalysts for the selective conversion of ethanol to acetaldehyde.
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2000-04-24
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