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Chemical surface transformation of SiC-based nanocables

M. BECHELANY1,* , D. CORNU1, F. CHASSAGNEUX1, S. BERNARD1, P. MIELE1

Affiliation

  1. Laboratoire des Multimatériaux et Interfaces, UMR 5615 CNRS – University Claude Bernard Lyon 1, 43 bd du 11 novembre 1918, F-69622 Villeurbanne Cedex, France

Abstract

A black cotton-like solid made of pure interlaced SiC≅C nanocables was prepared and fully characterized. These SiC≅C NCs are made of SiC nanowires sheathed by a turbostratic carbon coating. Chemical surface modifications of these NCs have been performed. They can be transformed into SiC≅SiO2 nanocables by a simple dry-air thermal treatment up to 550 °C. The nanofibrous shape is retained during the pyrolysis but the diameter of the ensuing NCs is smaler than that of the starting materials, due to a partial oxidation of the SiC core. The resulting amorphous silica coating can be removed by a concentrated HF treatment during 48H yielding pure SiC nanowires. These preliminary results demonstrate that chemical surface modifications of SiC-based fibrous nanostructures are possible. Applications are expected in the field of catalytic supports and composite materials..

Keywords

SiC nanocable, Catalyst support, Chemical surface modification.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

M. BECHELANY, D. CORNU, F. CHASSAGNEUX, S. BERNARD, P. MIELE, Chemical surface transformation of SiC-based nanocables, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 638-642 (2006)