Electrical conductivity and electromagnetic interference shielding of multiwalled carbon nanotube composites containing Fe catalyst
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Applied Physics Letters, ISSN: 0003-6951, Vol: 84, Issue: 4, Page: 589-591
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- Physics and Astronomy; Mass fractions; Shielding efficiencies (SE)
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.