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

在高压氩气环境下，采用激光汽化铜和石墨的方法，在没有催化剂的情况下合成了完全填充铜纳米线的一维碳纳米管。利用激光汽化硅和石墨制备了完全填充碳化硅纳米线的碳纳米管和碳化硅纳米线两种一维纳米结构。我们认为，一维纳米结构是由碳和Cu或Si组成的熔融复合颗粒在高温高压条件下生长出来的。

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.