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Article: Electric-Field-Tunable Conductivity in Graphene/Water and Graphene/Ice Systems

TitleElectric-Field-Tunable Conductivity in Graphene/Water and Graphene/Ice Systems
Authors
Keywordsconductivity
graphene
nanofluids
percolation
surface charge effect
Issue Date2017
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jabout/107640323/2421_info.html
Citation
Small, 2017, v. 13 n. 39, article no. 1701149 How to Cite?
AbstractThis study demonstrates that the application of an external electrical potential to a phenyl-sulfonic functionalized graphene (SG)/water suspension distinctly enhances its electrical conductivity via the structural transition from isolated clusters to a 3D SG network. Microstructural and alternating current impedance spectroscopy studies indicate that the surface charge plays an important role in the state of dispersion and connectivity of the SG in the suspension due to the potential-dependent interactions with functional groups on the SG surface in the presence of an external electrical potential. In addition, the conductive SG/ice can be produced via liquid–solid phase transition of the SG/water suspension in the presence of an external electrical potential, which shows a one-order magnitude improvement in electrical conductivity compared with pure ice. The electric-field-tunable property advances the understanding of nanofluid systems and has many potential applications. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Persistent Identifierhttp://hdl.handle.net/10722/245093
ISSN
2017 Impact Factor: 9.598
2015 SCImago Journal Rankings: 3.401
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhai, P-
dc.contributor.authorWang, Y-
dc.contributor.authorLiu, C-
dc.contributor.authorWang, X-
dc.contributor.authorFeng, SPT-
dc.date.accessioned2017-09-18T02:04:29Z-
dc.date.available2017-09-18T02:04:29Z-
dc.date.issued2017-
dc.identifier.citationSmall, 2017, v. 13 n. 39, article no. 1701149-
dc.identifier.issn1613-6810-
dc.identifier.urihttp://hdl.handle.net/10722/245093-
dc.description.abstractThis study demonstrates that the application of an external electrical potential to a phenyl-sulfonic functionalized graphene (SG)/water suspension distinctly enhances its electrical conductivity via the structural transition from isolated clusters to a 3D SG network. Microstructural and alternating current impedance spectroscopy studies indicate that the surface charge plays an important role in the state of dispersion and connectivity of the SG in the suspension due to the potential-dependent interactions with functional groups on the SG surface in the presence of an external electrical potential. In addition, the conductive SG/ice can be produced via liquid–solid phase transition of the SG/water suspension in the presence of an external electrical potential, which shows a one-order magnitude improvement in electrical conductivity compared with pure ice. The electric-field-tunable property advances the understanding of nanofluid systems and has many potential applications. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim-
dc.languageeng-
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jabout/107640323/2421_info.html-
dc.relation.ispartofSmall-
dc.subjectconductivity-
dc.subjectgraphene-
dc.subjectnanofluids-
dc.subjectpercolation-
dc.subjectsurface charge effect-
dc.titleElectric-Field-Tunable Conductivity in Graphene/Water and Graphene/Ice Systems-
dc.typeArticle-
dc.identifier.emailZhai, P: zhai1023@HKUCC-COM.hku.hk-
dc.identifier.emailFeng, SPT: hpfeng@hku.hk-
dc.identifier.authorityFeng, SPT=rp01533-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/smll.201701149-
dc.identifier.scopuseid_2-s2.0-85031123578-
dc.identifier.hkuros279247-
dc.identifier.volume13-
dc.identifier.issue39-
dc.identifier.spagearticle no. 1701149-
dc.identifier.epagearticle no. 1701149-
dc.identifier.isiWOS:000412925100003-
dc.publisher.placeGermany-

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