Dielectric anisotropy and electrical properties of the copper phthalocyanine (CuPc): 4-4?-n-Heptylcyanobiphenyl (7CB) composite liquid crystals

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dc.contributor.authorAl-Hazmi, Faten
dc.contributor.authorAl-Ghamdi, Ahmed A.
dc.contributor.authorAl-Senany, Noruh
dc.contributor.authorAlnowaiser, Fowzia
dc.contributor.authorYakuphanoğlu, Fahrettin
dc.date.accessioned2026-08-12T17:48:03Z
dc.date.issued2014
dc.departmentFırat Üniversitesi
dc.description.abstractDielectric anisotropy and electrical properties of the copper phthalocyanine (CuPc): 4-4'-n-heptylcyanobiphenyl (7CB) composite liquid crystals have been investigated. Liquid crystals exhibit dielectrically-controlled positive dielectric anisotropy (p-type Delta epsilon) and the dielectric anisotropy changes from positive to negative dielectric anisotropy (n-type Delta epsilon) behavior with frequency of applied electrical field. The critical frequency f(c) values for the 7CB and CuPc doped 7CB liquid crystals were found to be 602 kHz and 518 kHz, respectively. This indicates that CuPc doping causes a decrease in the critical frequency. The splay elastic coefficients of the 7CB and CuPc doped 7CB liquid crystals were determined and CuPc doping increases the splay elastic coefficient of 7CB liquid crystal. The 7CB liquid crystal exhibits a voltage-controlled differential negative resistance (VCNR) behavior and CuPc doping affects significantly VCNR behavior of 7CB. (C) 2013 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipDeanship of Scientific Research (DSR), King Abdulaziz University, Jeddah [34/19]; DSR
dc.description.sponsorshipThis project was funded by the Deanship of Scientific Research (DSR), King Abdulaziz University, Jeddah, under Grant number: GR# 34/19. The authors, therefore, acknowledge with thanks DSR technical and financial support.
dc.identifier.doi10.1016/j.compositesb.2013.07.018
dc.identifier.endpage19
dc.identifier.issn1359-8368
dc.identifier.issn1879-1069
dc.identifier.orcid0000-0002-5409-3770
dc.identifier.orcid0000-0001-6930-9493
dc.identifier.scopus2-s2.0-84883531397
dc.identifier.scopusqualityQ1
dc.identifier.startpage15
dc.identifier.urihttps://doi.org/10.1016/j.compositesb.2013.07.018
dc.identifier.urihttps://hdl.handle.net/11508/61270
dc.identifier.volume56
dc.identifier.wosWOS:000327562300003
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofComposites Part B-Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20260511
dc.subjectElectrical properties
dc.subjectPhysical properties
dc.subjectAnisotropy
dc.titleDielectric anisotropy and electrical properties of the copper phthalocyanine (CuPc): 4-4?-n-Heptylcyanobiphenyl (7CB) composite liquid crystals
dc.typeArticle

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