Electrical conductivity and electromagnetic interference shielding of multiwalled carbon nanotube composites containing Fe catalyst

H. M. Kim, K. Kim, C. Y. Lee, J. Joo, S. J. Cho, H. S. Yoon, D. A. Pejaković, J. W. Yoo, A. J. Epstein

Research output: Contribution to journalArticle

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Abstract

The thin and flexible films of multiwalled carbon nanotubes (MWCNT) and poly(methylmethacrylate) (PMMA) composites were synthesized for electromagnetic interference (EMI) shielding materials. The formation of a conducting network through MWCNTs in an insulating PMMA matrix and the existence of Fe catalyst in MWCNTs were observed. It was shown that the dc conductivity of the systems increased with increasing MWCNT mass fraction, showing typical percolation behavior. The results show that the highest EMI shielding efficiency (SE) for raw MWCNT-PMMA composites was ∼27 dB, indicating commercial use for far-field EMI shielding.

Original languageEnglish
Pages (from-to)589-591
Number of pages3
JournalApplied Physics Letters
Volume84
Issue number4
DOIs
Publication statusPublished - 2004 Jan 26

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Kim, H. M., Kim, K., Lee, C. Y., Joo, J., Cho, S. J., Yoon, H. S., Pejaković, D. A., Yoo, J. W., & Epstein, A. J. (2004). Electrical conductivity and electromagnetic interference shielding of multiwalled carbon nanotube composites containing Fe catalyst. Applied Physics Letters, 84(4), 589-591. https://doi.org/10.1063/1.1641167