Synthesis of Silicon Nanotubes on Porous Alumina Using Molecular Beam Epitaxy


  • This project was supported by the Ministry of Science and Technology through National Research Lab. program and Center for Nanotubes and Nanostructured Composites at Sungkyunkwan University. Suk-Ho Choi acknowledges partial support from the Korea Research Foundation Grant (KRF-2002-041-C00082).


Silicon nanotubes (SiNTs) have been grown on a porous alumina surface, without the assistance of catalysts, by molecular beam epitaxy (MBE). The flow rate of Si atoms and the corrugated porous alumina surface seem to play an important role in the continuous growth of Si tubular structures. The Figure shows a field-emission scanning electron microscopy image of the SiNTs grown on a regular array of hexagonal porous alumina.