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Issue 4, 2004
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Metal encapsulated nanotubes of silicon and germanium

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Abstract

Nanoforms of silicon such as nanoparticles and nanowires have been attracting much attention and recent findings of novel metal encapsulated silicon clusters as well as nanotubes have opened up new avenues for the development of silicon nanostructures. We review these recent developments and discuss the findings of the metal encapsulated nanotubes of silicon and germanium using ab initio total energy calculations. These nanotubes are generally found to be metallic. The metalicity is not induced by the doping of metal atoms, though they stabilize silicon and germanium in tubular forms. Transition metal atoms such as Mn and Fe lead to nanotubes that are ferromagnetic making them interesting as nanomagnets. Antiferromagnetic and ferrimagnetic phases have also been obtained. A novel aspect of these magnetic nanotubes is the possibility of developing half-metallic nanotubes that could be interesting for nano-spintronics applications. Further possibilities of semiconducting silicon nanotubes are discussed.

Graphical abstract: Metal encapsulated nanotubes of silicon and germanium

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Article information


Submitted
25 Sep 2003
Accepted
10 Dec 2003
First published
22 Jan 2004

J. Mater. Chem., 2004,14, 555-563
Article type
Feature Article

Metal encapsulated nanotubes of silicon and germanium

A. K. Singh, V. Kumar and Y. Kawazoe, J. Mater. Chem., 2004, 14, 555
DOI: 10.1039/B311850A

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