Concentration effect of Cadmium Selenide Sulphide/Zinc Sulphide quantum dots on electro-optic and dielectric properties in nematic liquid crystals composite

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dc.contributor.authorKocakülah, Gülsüm
dc.contributor.authorÖnsal, Gülnur
dc.contributor.authorGökşen, Kadir
dc.contributor.authorErcan, İsmail
dc.contributor.authorKöysal, Oğuz
dc.date.accessioned2020-04-30T22:41:37Z
dc.date.available2020-04-30T22:41:37Z
dc.date.issued2018
dc.departmentDÜ, Fen-Edebiyat Fakültesi, Fizik Bölümüen_US
dc.descriptionWOS: 000452280400008en_US
dc.description.abstractIn this work, we have studied concentration effect of Cadmium Selenide Sulphide/Zinc Sulphide (CdSeS/ZnS) quantum dots (QDs) dispersed on liquid crystalline material, 4-penty1-4'-cyanobiphenyl nematic liquid crystal (5CB NLC). We used the dielectric spectroscopy technique to obtain electrical and dielectric properties for pure 5CB and doped with QDs form. To observe the effect of CdSeS/ZnS QDs concentration, 5CB was dispersed with 0.05, 0.1 and 0.15% wt/wt CdSeS/ZnS QDs. Some physical parameters such as real part of dielectric permittivity (epsilon'), imaginary part of dielectric permittivity (epsilon ''), loss tangent (tan delta), dielectric anisotropy (Delta epsilon') and ac conductivity (sigma(ac)) of pure 5CB NLC and CdSeS/ZnS QDs doped 5CB NLC composite were measured in the frequency range of 1 kHz-10 MHz at various bias voltages by using dielectric spectroscopy technique at room temperature. In addition, the threshold voltage (V-th) and splay elastic constant (K-11) parameters were calculated dependent on doping concentration. The current-voltage (I-V) characteristics of the samples were also in vestigated. The results showed that the electro-optic and dielectric parameters change significantly with CdSeS/ZnS QDs doping and which were explained by the molecular interaction mechanism between LC molecules and CdSeS/ZnS QDs.en_US
dc.description.sponsorshipDuzce University Scientific Research ProjectDuzce University [2017.05.02.655]en_US
dc.description.sponsorshipThis work supported financially by Duzce University Scientific Research Project (Project No: 2017.05.02.655).en_US
dc.identifier.doi10.1016/j.physb.2018.09.012en_US
dc.identifier.endpage59en_US
dc.identifier.issn0921-4526
dc.identifier.issn1873-2135
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage47en_US
dc.identifier.urihttps://doi.org/10.1016/j.physb.2018.09.012
dc.identifier.urihttps://hdl.handle.net/20.500.12684/3218
dc.identifier.volume550en_US
dc.identifier.wosWOS:000452280400008en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Bven_US
dc.relation.ispartofPhysica B-Condensed Matteren_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectQuantum dotsen_US
dc.subjectNematic liquid crystalsen_US
dc.subjectDielectric propertiesen_US
dc.subjectConcentration effecten_US
dc.titleConcentration effect of Cadmium Selenide Sulphide/Zinc Sulphide quantum dots on electro-optic and dielectric properties in nematic liquid crystals compositeen_US
dc.typeArticleen_US

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