Lyotropic liquid-crystalline mesophase of lithium triflate-nonionic surfactant as gel electrolyte for graphene optical modulator

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dc.citation.epage11200en_US
dc.citation.issueNumber21en_US
dc.citation.spage11194en_US
dc.citation.volumeNumber121en_US
dc.contributor.authorBalci, F. M.en_US
dc.contributor.authorBalci, S.en_US
dc.contributor.authorKocabas, C.en_US
dc.contributor.authorDag, Ö.en_US
dc.date.accessioned2018-04-12T11:09:07Z
dc.date.available2018-04-12T11:09:07Z
dc.date.issued2023en_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractLithium salt (noncoordinating anions, such as lithium triflate (Ltf)) gel electrolytes may be key for the practical use of electrochemical devices. We introduce a new lyotropic liquid-crystalline (LLC) mesophase using Ltf, a small amount of water (as low as 1.3 water per Ltf), and nonionic surfactant (C18H37(OCH2CH2)10OH, C18E10). The LLC phase forms over a broad range of Ltf/C18E10 mole ratios, 2-18. The clear ethanol solution of the ingredients can be either directly spin-coated over a glass substrate to form a gel phase or it can be prepared as a gel by mixing Ltf, water, and C18E10. The mesophase leaches out surfactant molecules at low salt concentrations, but at a salt/surfactant mole ratio of above 8, the phase is homogeneous with a cubic mesostructure, fully transparent in the visible optical region, mechanically flexible, and an effective gel electrolyte. We have observed a large electrostatic doping on graphene with the Fermi energy level of ∼1.0 eV using Ltf-C18E10 gel electrolytes. The Ltf-based gels demonstrate better properties than commonly used ionic liquid electrolyte in graphene optical modulators. The stability of the new gel electrolytes and their superior performance make them suitable electrolytes for use in graphene-based optical modulators.en_US
dc.embargo.release2024-01-01
dc.identifier.doi10.1021/acs.jpcc.7b03622en_US
dc.identifier.issn1932-7447
dc.identifier.urihttp://hdl.handle.net/11693/37298
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/acs.jpcc.7b03622en_US
dc.source.titleJournal of Physical Chemistry Cen_US
dc.subjectCrystalline materialsen_US
dc.subjectElectrolytesen_US
dc.subjectGrapheneen_US
dc.subjectIonic liquidsen_US
dc.subjectLiquidsen_US
dc.subjectLithiumen_US
dc.subjectModulatorsen_US
dc.subjectNonionic surfactantsen_US
dc.subjectOptical signal processingen_US
dc.subjectSolid electrolytesen_US
dc.subjectSpin glassen_US
dc.subjectSubstratesen_US
dc.subjectSurface active agentsen_US
dc.subjectElectrochemical devicesen_US
dc.subjectElectrostatic dopingen_US
dc.subjectEthanol solutionsen_US
dc.subjectGlass substratesen_US
dc.subjectIonic liquid electrolytesen_US
dc.subjectLow salt concentrationen_US
dc.subjectLyotropic liquid crystallineen_US
dc.subjectSurfactant moleculesen_US
dc.subjectLight modulatorsen_US
dc.titleLyotropic liquid-crystalline mesophase of lithium triflate-nonionic surfactant as gel electrolyte for graphene optical modulatoren_US
dc.typeArticleen_US

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Institute of Materials Science and Nanotechnology (UNAM)
Department of Chemistry
Department of Physics