Lyotropic liquid-crystalline mesophase of lithium triflate-nonionic surfactant as gel electrolyte for graphene optical modulator
dc.citation.epage | 11200 | en_US |
dc.citation.issueNumber | 21 | en_US |
dc.citation.spage | 11194 | en_US |
dc.citation.volumeNumber | 121 | en_US |
dc.contributor.author | Balci, F. M. | en_US |
dc.contributor.author | Balci, S. | en_US |
dc.contributor.author | Kocabas, C. | en_US |
dc.contributor.author | Dag, Ö. | en_US |
dc.date.accessioned | 2018-04-12T11:09:07Z | |
dc.date.available | 2018-04-12T11:09:07Z | |
dc.date.issued | 2023 | en_US |
dc.department | Institute of Materials Science and Nanotechnology (UNAM) | en_US |
dc.department | Department of Physics | en_US |
dc.department | Department of Chemistry | en_US |
dc.description.abstract | Lithium 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.description.provenance | Made available in DSpace on 2018-04-12T11:09:07Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2017 | en |
dc.embargo.release | 2024-01-01 | |
dc.identifier.doi | 10.1021/acs.jpcc.7b03622 | en_US |
dc.identifier.issn | 1932-7447 | |
dc.identifier.uri | http://hdl.handle.net/11693/37298 | |
dc.language.iso | English | en_US |
dc.publisher | American Chemical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1021/acs.jpcc.7b03622 | en_US |
dc.source.title | Journal of Physical Chemistry C | en_US |
dc.subject | Crystalline materials | en_US |
dc.subject | Electrolytes | en_US |
dc.subject | Graphene | en_US |
dc.subject | Ionic liquids | en_US |
dc.subject | Liquids | en_US |
dc.subject | Lithium | en_US |
dc.subject | Modulators | en_US |
dc.subject | Nonionic surfactants | en_US |
dc.subject | Optical signal processing | en_US |
dc.subject | Solid electrolytes | en_US |
dc.subject | Spin glass | en_US |
dc.subject | Substrates | en_US |
dc.subject | Surface active agents | en_US |
dc.subject | Electrochemical devices | en_US |
dc.subject | Electrostatic doping | en_US |
dc.subject | Ethanol solutions | en_US |
dc.subject | Glass substrates | en_US |
dc.subject | Ionic liquid electrolytes | en_US |
dc.subject | Low salt concentration | en_US |
dc.subject | Lyotropic liquid crystalline | en_US |
dc.subject | Surfactant molecules | en_US |
dc.subject | Light modulators | en_US |
dc.title | Lyotropic liquid-crystalline mesophase of lithium triflate-nonionic surfactant as gel electrolyte for graphene optical modulator | en_US |
dc.type | Article | en_US |
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