Effect of iron phthalocyanine (FePc) concentration on electrical and dielectric properties of the nematic liquid crystal composites

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dc.contributor.authorYıldırım, Mert
dc.contributor.authorKöysal, Oğuz
dc.contributor.authorÖnsal, Gülnur
dc.contributor.authorGümüş, Eren
dc.date.accessioned2020-05-01T09:11:42Z
dc.date.available2020-05-01T09:11:42Z
dc.date.issued2016
dc.departmentDÜ, Mühendislik Fakültesi, Mekatronik Mühendisliği Bölümüen_US
dc.descriptionYILDIRIM, Mert/0000-0002-8526-1802en_US
dc.descriptionWOS: 000386986300104en_US
dc.description.abstractElectrical and dielectric properties of iron phthalodyanine (FePc) dispersed E63 nematic LC were investigated using admittance measurements in the frequency range of 100 Hz - 20 MHz and current measurements in the bias range of 0-20 V. In order to observe the effect of FePc concentration, E63 was dispersed with 1,3 and 5% wt/wt FePc. Basic dielectric parameters such as dielectric anisotropy (Delta epsilon), crossover frequency (f(c)); real and imaginary parts of dielectric permittivity (epsilon' and epsilon") and relaxation time (tau) of the samples were obtained from the (sigma(ac) sigma(dc)). experimental data, along with threshold voltage (V-th), splay elastic constant (K-11) and conductivity parameters (sigma(ac) sigma(dc)). Dispersal of FePc and its concentration caused V-th, K-11, sigma(dc), and f(c) of the LC composites increase whereas tau is lowered. LC composites were found to exhibit relaxation in low and high frequency regions such that the former was masked due to high conductivity in the samples and hence electric modulus formalism was applied to determine low frequency relaxation. Prominent effect of FePc dispersal was found in sigma(dc) values in a way that sigma(dc) of the LC composite of E63 with 5% wt/wt FePc is about 53 times larger than that of neat E63. (C) 2016 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipDuzce University Scientific Research ProjectDuzce University [2014.05.02.239]en_US
dc.description.sponsorshipThis work is supported financially by Duzce University Scientific Research Project (Project No: 2014.05.02.239).en_US
dc.identifier.doi10.1016/j.molliq.2016.09.001en_US
dc.identifier.endpage872en_US
dc.identifier.issn0167-7322
dc.identifier.issn1873-3166
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage868en_US
dc.identifier.urihttps://doi.org/10.1016/j.molliq.2016.09.001
dc.identifier.urihttps://hdl.handle.net/20.500.12684/5727
dc.identifier.volume223en_US
dc.identifier.wosWOS:000386986300104en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.ispartofJournal Of Molecular Liquidsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectMetallophthalocyaninesen_US
dc.subjectNematic liquid crystalsen_US
dc.subjectDielectric propertiesen_US
dc.subjectDielectric relaxationen_US
dc.subjectElectrical conductivityen_US
dc.titleEffect of iron phthalocyanine (FePc) concentration on electrical and dielectric properties of the nematic liquid crystal compositesen_US
dc.typeArticleen_US

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