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Yoo, Jung-Woo
Functional Hybrid Materials and Devices Lab(FHMDL)
Research Interests
  • Transport properties, spintronics, organic/molucular magnet, electronic, and spintronics,

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

DC FieldValueLanguage
dc.contributor.authorKim, HMko
dc.contributor.authorKim, Kko
dc.contributor.authorLee, CYko
dc.contributor.authorJoo, Jko
dc.contributor.authorCho, SJko
dc.contributor.authorYoon, HSko
dc.contributor.authorPejakovic, DAko
dc.contributor.authorYoo, Jung-Wooko
dc.contributor.authorEpstein, AJko
dc.date.available2014-10-27T00:10:46Z-
dc.date.created2014-10-24ko
dc.date.issued200401ko
dc.identifier.citationAPPLIED PHYSICS LETTERS, v.84, no.4, pp.589 - 591ko
dc.identifier.issn0003-6951ko
dc.identifier.urihttp://scholarworks.unist.ac.kr/handle/201301/7743-
dc.identifier.urihttp://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=1242307312ko
dc.description.abstractThin and flexible composite films of raw or purified multiwalled carbon nanotube (MWCNT) with various mass fractions and poly(methylmethacrylate) (PMMA) were synthesized for electromagnetic interference (EMI) shielding material. From scanning electron microscopy and high-resolution transmission electron microscopy photographs, we observed the formation of a conducting network through MWCNTs in an insulating PMMA matrix and the existence of an Fe catalyst in MWCNTs. The dc conductivity (sigma(dc)) of the systems increased with increasing MWCNT mass fraction, showing typical percolation behavior. The measured EMI shielding efficiency (SE) of MWCNT-PMMA composites by using the extended ASTM D4935-99 method (50 MHz-13.5 GHz) increased with increasing MWCNT mass fraction as sigma(dc). The highest EMI SE for raw MWCNT-PMMA composites was similar to27 dB, indicating commercial use for far-field EMI shielding. The contribution of absorption to total EMI SE of the systems is larger than that of reflection. Based on magnetic permeability, we suggest raw MWCNTs and their composites can be used for near-field EMI shielding.ko
dc.description.statementofresponsibilityopen-
dc.languageENGko
dc.publisherAMER INST PHYSICSko
dc.subjectMass fractionsko
dc.subjectShielding efficiencies (SE)ko
dc.titleElectrical conductivity and electromagnetic interference shielding of multiwalled carbon nanotube composites containing Fe catalystko
dc.typeARTICLEko
dc.identifier.pid1027null
dc.identifier.rimsid17576ko
dc.identifier.scopusid2-s2.0-1242307312ko
dc.identifier.wosid000188316500045ko
dc.type.rimsAko
dc.description.wostc286*
dc.description.scopustc295*
dc.date.tcdate2015-05-06*
dc.date.scptcdate2014-10-24*
dc.identifier.doihttp://dx.doi.org/10.1063/1.1641167ko
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