石墨矿床中产出的天然纳米碳管

纳米碳管因其特有的性质已成为一种引人注目的材料。本文报道了产于新疆苏吉泉石墨矿床中的天然纳米碳管,并对其进行了高分辨电子显微镜研究。该发现表明迄今为止所有碳的同素异形体均可产于自然界,并且高温、压力、催化剂颗粒在产生纳米碳管的过程中起到了非常重要的作用。计算了石墨化花岗岩的形成温度和压力等条件。该发现对指导科学家合成纳米碳管和利用该矿床具有十分重要的意义。

Naturally Occurring Carbon Nanotubes from Graphite Ore Deposit

Carbon nanotubes represent an impressive kind of materials with diverse unexpected properties. A new type of natural carbon nanotubes found in the Sujiquan graphite ore deposit, Xinjiang, China is presented and observed with high resolution transmission electron microscopy (HRTEM). This finding shows that all allotropic carbon forms known up to date can be produced in nature, and high temperature, pressure, catalysts particles seem to play an important role in producing carbon nanotubes. The forming conditions such as temperature and pressure of carbon nanotubes in graphitizing granite have been calculated. It has very important significance for scientist to design the condition of CNTs synthesis and utilize the ore deposit.