Temperature dependence of the electrical conductivity of vapor grown carbon nanofiber/epoxy composites with different filler dispersion levels

doi:10.1016/j.physleta.2012.09.045

Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/21881

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Campo DC	Valor	Idioma
dc.contributor.author	Cardoso, Paulo	-
dc.contributor.author	Silva, J.	-
dc.contributor.author	Moreira, J. Agostinho	-
dc.contributor.author	Klosterman, D.	-
dc.contributor.author	Hattum, F. W. J. van	-
dc.contributor.author	Simões, Ricardo	-
dc.contributor.author	Lanceros-Méndez, S.	-
dc.date.accessioned	2012-12-20T13:53:14Z	-
dc.date.available	2012-12-20T13:53:14Z	-
dc.date.issued	2012	-
dc.identifier.issn	0375-9601	por
dc.identifier.uri	https://hdl.handle.net/1822/21881	-
dc.description.abstract	The influence of the dispersion of vapor grown carbon nanofibers (VGCNF) on the electrical properties of VGCNF/epoxy composites has been studied. A homogeneous dispersion of the VGCNF does not imply better electrical properties. The presence of well distributed clusters appears to be a key factor for increasing composite conductivity. It is also shown that the main conduction mechanism has an ionic nature for concentrations below the percolation threshold, while above the percolation threshold it is dominated by hopping between the fillers. Finally, using the granular system theory it is possible to explain the origin of conduction at low temperatures.	por
dc.description.sponsorship	We acknowledge the Foundation for Science and Technology, Lisbon, for the financial support through the 3 Quadro Comunitario de Apoio, the POCTI and FEDER programs, projects PTDC/CTM/69316/2006, NANO/NMed-SD/0156/2007, and PEst-C/CTM/LA0025/2011. We also acknowledge the FCT grants SFRH/BD/60623/2009 (J.S.) and SFRH/BD/41191/2007 (P.C.), the Joint Luso-American Foundation (FIAD)-NSF U.S. Research Networks Program research grant (F.W.J.v.H. and D.K.). We also thank Albemarle for the hardener, Hexion Specialty Chemicals for the epoxy resin and Applied Sciences for providing their facilities. We also thank to J. Oliveira for the collaboration.	por
dc.language.iso	eng	por
dc.publisher	Elsevier Science BV	por
dc.rights	restrictedAccess	por
dc.subject	Composite materials	por
dc.subject	Polymer-based composites	por
dc.subject	Percolation	por
dc.subject	Low temperature measurements	por
dc.title	Temperature dependence of the electrical conductivity of vapor grown carbon nanofiber/epoxy composites with different filler dispersion levels	por
dc.type	article	-
dc.peerreviewed	yes	por
sdum.publicationstatus	published	por
oaire.citationStartPage	3290	por
oaire.citationEndPage	3294	por
oaire.citationIssue	45	por
oaire.citationTitle	Physics Letters A	por
oaire.citationVolume	376	por
dc.identifier.doi	10.1016/j.physleta.2012.09.045	por
dc.subject.wos	Science & Technology	por
sdum.journal	Physics Letters A	por
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