2D nanosheet paint from solvent-exfoliated Bi2Te3 ink

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dc.contributor.authorCarroll, Elaine
dc.contributor.authorBuckley, Darragh
dc.contributor.authorMogili, N. V. V.
dc.contributor.authorMcNulty, David
dc.contributor.authorMoreno, M. Sergio
dc.contributor.authorGlynn, Colm
dc.contributor.authorCollins, Gillian
dc.contributor.authorHolmes, Justin D.
dc.contributor.authorRazeeb, Kafil M.
dc.contributor.authorO'Dwyer, Colm
dc.contributor.funderIrish Research Councilen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderConsejo Nacional de Investigaciones Científicas y Técnicasen
dc.contributor.funderAgencia Nacional de Promoción Científica y Tecnológicaen
dc.contributor.funderHorizon 2020en
dc.contributor.funderAnalog Devices
dc.contributor.funderMinistry of Science, Technology, Innovation and Communication, Brazil
dc.date.accessioned2017-09-12T11:22:52Z
dc.date.available2017-09-12T11:22:52Z
dc.date.issued2017-08-09
dc.date.updated2017-09-12T10:55:39Z
dc.description.abstractEmbedding 2D layered materials into polymers and other materials as composites has resulted in the development of ultrasensitive pressure sensors, tunable conductive stretchable polymers, and thermoelectric coatings. As a wettable paint or ink, many 2D materials may be penciled, printed, or coated onto a range of surfaces for a variety of applications. However, the intrinsic conductive properties of painted coatings using 2D and layered materials are not completely understood, and conductive polymer additives may mask underlying properties such as directional conductivity. We report a process for making a paint from solvent-exfoliated Bi2Te3 into solution-dispersible 2D and few-layer (multiple quintuple) nanosheet inks, that form smooth, uniform paint blends at several concentrations of Bi2Te3. The individual solvent-exfoliated nanosheets are edge-coated by (poly)ethylene glycol to produce a paint, stable over extended period in solution. Electrical transport is found to be sensitive to aspect ratio, and conduction along the painting direction is suppressed for longer strips so long as the aspect ratio is high (4–10× or more), but for short and wide paint strips (aspect ratio ≤1), conductance is improved by a factor of 3×. Square 2D paint regions show no clear directional preference for conductance at room temperature but are markedly affected by higher temperatures. Conductivity along a preferential conduction pathway through the nanosheet ensemble is modulated by 2D nanosheet stacking along the direction of paint application for a given aspect ratio. This paint and insights into geometrical 2D composite conduction may have implications for conductive composites, thermoelectrics, and writable circuits using 2D material paints or inks.en
dc.description.sponsorshipIrish Research Council (Enterprise Partnership Scheme with Analog Devices B.V., Award EPSPG/2011/160; Government of Ireland Postgraduate Award under Contract GOIPG/2014/206; New Foundations Award); Science Foundation Ireland (Grant Number 14/IA/2581; National Access Programme NAP 417; Technology Innovation and Development Awards 13/TIDA/E2761 and 15/TIDA/2893); Consejo Nacional de Investigaciones Científicas y Técnicas and Agencia Nacional de Promoción Científica y Tecnológica (PICT 2012-1136)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCarroll, E., Buckley, D., Mogili, N. V. V., McNulty, D., Moreno, M. S., Glynn, C., Collins, G., Holmes, J. D., Razeeb, K. M. and O'Dwyer, C. (2017) '2D nanosheet paint from solvent-exfoliated Bi2Te3 ink', Chemistry of Materials, 29(17), pp. 7390-7400. doi:10.1021/acs.chemmater.7b02321en
dc.identifier.doi10.1021/acs.chemmater.7b02321
dc.identifier.endpage7400en
dc.identifier.issn0897-4756
dc.identifier.issued17en
dc.identifier.journaltitleChemistry of Materialsen
dc.identifier.startpage7390en
dc.identifier.urihttps://hdl.handle.net/10468/4687
dc.identifier.volume29en
dc.language.isoenen
dc.publisherAmerican Chemical Societyen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::RIA/644453/EU/Thermally Integrated Smart Photonics Systems/TIPSen
dc.rights© 2017 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.en
dc.rights.urihttp://pubs.acs.org/page/policy/authorchoice_termsofuse.htmlen
dc.subjectConductive compositeen
dc.subjectThermoelectricen
dc.subjectPolymeren
dc.title2D nanosheet paint from solvent-exfoliated Bi2Te3 inken
dc.typeArticle (peer-reviewed)en
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