Catalyst free fabrication of one dimensional nanostructures composed of carbon and metals

在无催化剂的情况下，利用激光蒸发法在高压氩气气氛下制备了完全填充Cu颗粒的碳纳米管一维纳米结构。利用激光蒸发Si和石墨的方法制备了完全填充SiC纳米线的碳纳米管和完全填充SiC纳米线的碳纳米管两种一维纳米结构。我们认为，一维纳米结构是在高温高压条件下由碳和铜或硅组成的熔融复合颗粒生长的。

One-dimensional nanostructures-carbon nanotubes filled completely with Cu nanowires-were synthesized by laser vaporization of Cu and graphite under high-pressure Ar gas atomosphere without the help of catalysts. Two types of one-dimensional nanostructures-carbon nanotubes filled completely with SiC nanowires and SiC nanowires-were also synthesized by laser vaporization of Si and graphite. We suggest that the one-dimensional nanostructures are grown from molten composite particles composed of carbon and Cu or Si under the condition of high temperature and pressure.