Showing papers by "Mikhael Bechelany published in 2006"
Journal Article•
TL;DR: In this article, a black cotton-like solid made of pure interlaced SiC≅C nanocables was prepared and fully characterized, which can be transformed into SiC−SiO 2 nanocable by a simple dry-air thermal treatment up to 550 °C.
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≅SiO 2 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 smaller 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.
15 citations
Patent•
23 Jun 2006
TL;DR: In this article, a procede de croissance, a procedure that concerne un procede of croissance based on a temperature T of the croissance donnee, is described.
Abstract: L'invention concerne un procede de croissance, a une temperature T de croissance donnee, de nanofils de carbure de silicium cubique (beta-SiC), de nitrure de silicium trigonal (alpha-Si3N4), ou d'un melange de beta-SiC et de alpha-Si3N4, caracterise en ce que la croissance est realisee a la temperature de croissance T, sur un support en graphite, par reaction d'un derive de carbone a l'etat gazeux et d'un derive du silicium a l'etat gazeux, et eventuellement d'un derive d'azote a l'etat gazeux.