Coaxial nanocable: silicon carbide and silicon oxide sheathed with boron nitride and carbon
Multielement nanotubes comprising multiple phases, with diameters of a few tens of nanometers and lengths up to 50 micrometers, were successfully synthesized by means of reactive laser ablation. The experimentally determined structure consists of a beta-phase silicon carbide core, an amorphous silicon oxide intermediate layer, and graphitic outer shells made of boron nitride and carbon layers separated in the radial direction. The structure resembles a coaxial nanocable with a semiconductor-insulator-metal (or semiconductor-insulator-semiconductor) geometry and suggests applications in nanoscale electronic devices that take advantage of this self-organization mechanism for multielement nanotube formation.
Y. Zhang, Fundamental Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba, Ibaraki 305-8501, Japan. K. Suenaga, Laboratoire de Physique des Solides, URA 002, Universite de Paris-Sud, Batiment 510, 91405 Orsay, France,
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Zhang
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Suenaga
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Colliex
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Iijima