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

Citation data:

Applied Physics Letters, ISSN: 0003-6951, Vol: 84, Issue: 4, Page: 589-591

Publication Year:
2004
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/7743
DOI:
10.1063/1.1641167
Author(s):
J. W. Yoo, D. A. Pejaković, C. Y. Lee, A. J. Epstein, J. Joo, H. M. Kim, H. S. Yoon, K. Kim, S. J. Cho
Publisher(s):
AIP Publishing, AMER INST PHYSICS
Tags:
Physics and Astronomy, Mass fractions, Shielding efficiencies (SE)
article description
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.