Tubular Structures of Siloxenes

✍ Scribed by G. Seifert; Th. Frauenheim; Th. Köhler; H.M. Urbassek

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 133 KB
• Volume: 225
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/1521-3951(200106)225:2<393::aid-pssb393>3.0.co;2-b

✦ Synopsis

Using density-functional tight-binding theory we demonstrate that silicon-based tubular nanostructures in the form of siloxenes are stable and energetically viable. The structures studied here have a semiconducting gap which is independent of the chirality, but showing an increase of the gap size with increasing diameter towards that of the corresponding siloxene layer. The Si-based nanotubes are less stiff than tubes of other chemical compositions so far studied, but having Young's modulus of a magnitude similar to the bulk modulus of diamond silicon.