Hydrogen activated axial inter-conversion in SiC nanowires

Autor(en)

Mark Rümmeli, David B Adebimpe, Ewa Borowiak-Palen, Thomas Gemming, Paola Ayala, Nicolas Ioannides, Thomas Pichler, Andrzej Huczko, Stanisław Cudziło, Martin Knupfer, Bernd Büchner

Abstrakt

A facile low pressure annealing route using NH3 as a hydrogen source for the structural and chemical modification of SiC nanowires (SiCNWs) is presented. The developed route transforms SiCNWs into tubular SiC nanostructures while coaxial SiO2/SiCNWs reverse their sheath/core structure. Our findings suggest a decomposition process induced via the preferential substitution of silicon by hydrogen and via the difference in diffusion rates of available atomic species, which leads to axial structural rearrangement. In addition to these effects, the procedure improves the crystallinity of the samples. The process could be exploited as a viable route to manipulate a variety of nanostructures and films for doping and etching and structural manipulation.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, Polymath Interscience LLC, Annapolis, Military University of Technology in Warsaw, West Pomeranian University of Technology Szczecin, London Metropolitan University, University of Warsaw

Journal

Journal of Solid State Chemistry

Band

182

Seiten

602-607

Anzahl der Seiten

6

ISSN

0022-4596

DOI

https://doi.org/10.1016/j.jssc.2008.12.004

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/39dcfbac-2a30-4782-b49d-170e37a4a8b6