Acta Metallurgica Sinica (English Letters) ›› 1999, Vol. 12 ›› Issue (4): 345-352.

• Research paper • Previous Articles     Next Articles

PRODUCTION OF HIGHLY GRAPHITIZED MULTIWALlED CARBON ANOTUBES

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,Shenyang University, Wanghuanan Street21 ,Dadong District,Shenyang 110044 ,China 3) Department of Physics, Meijo University, Shiogamaguchi 1 501,Tempaku ku, Nagoya 468 8502,Japan$   

  • Received:1999-08-25 Revised:1999-08-25 Online:1999-08-25 Published:2009-10-10

Abstract: 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.

Key words: multiwalled carbon nanotubes, hydrogen arc, SEM, HRTEM, Raman spectrometer