| 5 | PRODUCTION OF HIGHLY GRAPHITIZED MULTIWALlED CARBON ANOTUBES显示文摘Multiwalled carbon nanotubes ( MWNTs) were prepared by DCarc dischargein hydrogen gas, and werethermally purified byinfrared radiation in air. The morphology of pristineand purified MWNTs was observed by scanning electron microscope ( SEM) , and the crys tallinestructureand perfection wereinvestigated by high resolution transmission electron mi croscope( HRTEM) and Raman spectrometer. Itcameto the conclusion thatthese MWNTs possessed a high degreeof graphitization and very narrow centralchannel(about1 0 nm indiameter) , giving risetotheappearanceof breathing modesfor MWNTs. | X.L.Zhao1) ,T.L.Guo2) ,M.Ohkohchi3) ,T.Okazaki3) ,S.Iijima and Y.Ando3) 1) Japan Science and Technology Corporation ,Department of Physics, Meijo University ,Shiogamaguchi1 501 ,Tempaku ku , Nagoya 468 8502 ,Japan 2) Scientific Research Department,Sh | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，4： | 0 |
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