Highly proton conductive phosphoric acid-nonionic surfactant lyotropic liquid crystalline mesophases and application in graphene optical modulators

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dc.citation.epage11012en_US
dc.citation.issueNumber10en_US
dc.citation.spage11007en_US
dc.citation.volumeNumber8en_US
dc.contributor.authorTunkara, E.en_US
dc.contributor.authorAlbayrak, C.en_US
dc.contributor.authorPolat, E. O.en_US
dc.contributor.authorKocabas, C.en_US
dc.contributor.authorDag, Ö.en_US
dc.date.accessioned2016-02-08T10:59:07Z
dc.date.available2016-02-08T10:59:07Z
dc.date.issued2014en_US
dc.departmentDepartment of Chemistryen_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractProton conducting gel electrolytes are very important components of clean energy devices. Phosphoric acid (PA, H3PO4 3 H2O) is one of the best proton conductors, but needs to be incorporated into some matrix for real device applications, such as into lyotropic liquid crystalline mesophases (LLCMs). Herein, we show that PA and nonionic surfactant (NS, C12H25(OCH2CH2)10OH, C12E10) molecules self-assemble into PANS LLCMs and display high proton conductivity. The content of the PANS LLCM can be as high 75% H3PO4 3 H2O and 25% 10-lauryl ether (C12H25(OCH2CH2)10OH, C12E10), and the mesophase follows the usual LLC trend, bicontinuous cubic (V1) normal hexagonal (H1) micelle cubic (I1), by increasing the PA concentration in the media. The PANS LLCMs are stable under ambient conditions, as well as at high (up to 130 C) and low ( 100 C) temperatures with a high proton conductivity, in the range of 10 2 to 10 6 S/cm. The mesophase becomes a mesostructured solid with decent proton conductivity below 100 C. The mesophase can be used in many applications as a proton-conducting media as well as a phosphate source for the synthesis of various metal phosphates. As an application, we demonstrate a graphene-based optical modulator using supercapacitor structure formed by graphene electrodes and a PANS electrolyte. A PANS LLC electrolyte-based supercapacitor enables efficient optical modulation of graphene electrodes over a range of wavelengths, from 500 nm to 2 μm, under ambient conditions.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T10:59:07Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2014en
dc.identifier.doi10.1021/nn505199qen_US
dc.identifier.eissn1936-086X
dc.identifier.issn1936-0851
dc.identifier.urihttp://hdl.handle.net/11693/26388
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/nn505199qen_US
dc.source.titleACS Nanoen_US
dc.subjectGel electrolyteen_US
dc.subjectLyotropic liquid crystalen_US
dc.subjectGraphene optical modulatoren_US
dc.subjectProton conductorsen_US
dc.subjectPhosphoric aciden_US
dc.titleHighly proton conductive phosphoric acid-nonionic surfactant lyotropic liquid crystalline mesophases and application in graphene optical modulatorsen_US
dc.typeArticleen_US

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