Carbide-derived carbon (CDC) nanowires (NWs) have been synthesized by the high-temperature treatment of small-diameter β-SiC whiskers with Cl 2/H 2. A variety of physical measurements indicate that Si was extracted by exposure to Cl 2 and that the C in the carbon nanowires is primarily sp 2-bonded. From BET measurements, the specific surface area of these carbon nanowires is 1.3 × 10 3 m 2/g and they contain a network of nanopores. Nanoindentation measurements indicate that the SiC-derived C is not a stiff material, the elastic modulus being 5.0 ±1.2 GPa. High-temperature treatment of the CDC nanowires under an inert gas significantly increases the degree of graphitization. In addition, partial extraction was used to obtain core-shell structures having a thin and also very high surface area CDC shell; further treatment at high temperature was used to produce graphitized carbon shell-crystalline SiC core NWs.
|Original language||English (US)|
|Number of pages||6|
|Journal||Chemistry of Materials|
|State||Published - Feb 7 2006|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Materials Chemistry