Sensitive G-band raman features for the electrical conductivity of multi-walled carbon nanotubes

Yoong Ahm Kim, Hiroshi Kakegawa, Kazunori Fujisawa, Daisuke Shimamoto, Hiroyuki Muramatsu, Jin Hee Kim, Yong Chae Jung, Takuya Hayashi, Morinobu Endo, Mauricio Terrones, Mildred S. Dresselhaus

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We have studied the structural parameters of catalytically grown highly disordered multi-walled carbon nanotubes that were heat treated at temperatures between 1200 °C and 2600 °C in an argon atmosphere. Rather than the interlayer spacing or the R value (the intensity of the D band divided by the intensity of the G band), we found that the half width at half maximum intensity of the G band was the most sensitive parameter that is correlated with the altered electrical conductivity of an individual carbon nanotube that had been heat treated at high temperatures. This is because onedimensional nanocarbons exhibit a preference for two-dimensional structural development along the length of the tube due to the limited mobility of carbon atoms along the circumferential direction. Tubes heat treated at 2200 °C exhibited both a high electrical conductivity and an absence of lithium-ion intercalation, and thus are the best conductive filler for the active materials of lithium-ion batteries for long-term stability.

Original languageEnglish (US)
Pages (from-to)3940-3944
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Issue number6
StatePublished - Jun 2010

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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