Diamond Nanorods from Carbon Nanotubes


  • The authors thank Professor S. S. Xie for his help in the preparation of carbon nanotubes. This work was financially supported by the Key Project of Knowledge Innovation Program of Chinese Academy of Sciences, National Science Foundation of China (Grant No. 10 375 085), National Basic Research Program of China (Grant No. 2003CB716 901) and Shanghai Nanometer Special Foundation (Grant No. 0352nm050).


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The synthesis of single-crystalline diamond nanorods (with diameters of 4–8 nm and with lengths up to 200 nm) via the hydrogen plasma post-treatment of multiwalled carbon nanotubes is described. The diamond nanorods (see Figure) are identified as having a core–sheath structure with the inner core being diamond crystal and the outer shell being composed of amorphous carbon. A growth mechanism for diamond nanorods is proposed.