Influence of azo dye concentration on dielectric response in polymer dispersed liquid crystal composites

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dc.contributor.authorÖnsal, Gülnür
dc.contributor.authorKocakülah, Gülsüm
dc.contributor.authorKahyaoğlu, Aliye
dc.contributor.authorKöysal, Oğuz
dc.date.accessioned2020-04-30T23:18:30Z
dc.date.available2020-04-30T23:18:30Z
dc.date.issued2019
dc.departmentDÜ, Fen-Edebiyat Fakültesi, Fizik Bölümüen_US
dc.descriptionWOS: 000469154300066en_US
dc.description.abstractIn this paper, we have investigated dielectric properties of azo dye methyl red (MR) doped polymer dispersed liquid crystal (PDLC) composites. Norland optical adhesive (NOA 65) and nematic liquid crystal (E63) materials were used to construction of PDLC composite. In order to observe the effect of MR concentration, PDLC was dispersed with 1,3 and 5% wt/wt MR Dielectric properties have been investigated using the dielectric spectroscopy method in the frequency range of 500 Hz to 10 MHz at room temperature. Dielectric constant (epsilon' and epsilon ''), dielectric anisotropy (Delta epsilon'), relaxation frequency (f(R)), relaxation time (tau), threshold voltage (V-th) and also splay elastic constant (K-11) have been determined for the pure PDLC and its doped version PDLC + 1%MR, PDLC + 3% MR and PDLC + 5% MR composites by using experimental data. Dispersal of increasing MR concentration caused tau, V-th, K-11 are decreased whereas f(R) is increased for the investigated samples. Results show that different MR concentrations significantly affect the dielectric properties of PDLC composites and make it suitable to design new based on PDLC device applications. (C) 2019 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipDtizce University Scientific Research Project [2018.05.02.811]en_US
dc.description.sponsorshipThis work supported financially by Dtizce University Scientific Research Project (Project No: 2018.05.02.811).en_US
dc.identifier.doi10.1016/j.molliq.2019.04.030en_US
dc.identifier.endpage615en_US
dc.identifier.issn0167-7322
dc.identifier.issn1873-3166
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage607en_US
dc.identifier.urihttps://doi.org/10.1016/j.molliq.2019.04.030
dc.identifier.urihttps://hdl.handle.net/20.500.12684/3360
dc.identifier.volume284en_US
dc.identifier.wosWOS:000469154300066en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevieren_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.subjectPolymer dispersed liquid crystalen_US
dc.subjectAzo dyeen_US
dc.subjectConcentration effecten_US
dc.subjectDielectric propertiesen_US
dc.titleInfluence of azo dye concentration on dielectric response in polymer dispersed liquid crystal compositesen_US
dc.typeArticleen_US

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