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Synergy effects in the electrical conductivity behavior of onion‐like carbon and multiwalled carbon nanotubes composites
Author(s) -
Kranauskaite Ieva,
Macutkevic Jan,
Banys Juras,
Talik Ewa,
Kuznetsov Vladimir,
Nunn Nicholas,
Shenderova Olga
Publication year - 2015
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201451745
Subject(s) - materials science , carbon nanotube , composite material , percolation threshold , dielectric , conductivity , permittivity , graphene , electrical resistivity and conductivity , percolation (cognitive psychology) , dielectric permittivity , carbon fibers , nanotechnology , composite number , chemistry , optoelectronics , engineering , neuroscience , electrical engineering , biology
The dielectric/electric properties of polyurethane composites filled with carbon nanotubes (CNT), onion‐like carbon (OLC), and mixed OLC/CNT are compared across a wide frequency range from hertz to terahertz. The dielectric/electric properties of composites filled with OLC are very attractive and can be improved by addition of small amounts of CNTs due to a strong synergism between the two carbon allotropes. Moreover, in composites with mixed OLC/CNT inclusions, the value of the percolation threshold is lower than the value predicted by the excluded‐volume theory. In composites with mixed OLC/CNT inclusions, the dielectric permittivity and electrical conductivity increase due to a decrease in the average distance between nanocarbon clusters.