Thermal conductivity measurements in nanosheets via bolometric effect

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buir.contributor.authorÇakıroğlu, Onur
buir.contributor.authorMehmood, Naveed
buir.contributor.authorÇiçek, Mert Miraç
buir.contributor.authorRasouli, Hamid Reza
buir.contributor.authorDurgun, Engin
buir.contributor.authorKasırga, T. Serkan
buir.contributor.authorAikebaier, Aizimaiti
dc.citation.epage035003-1en_US
dc.citation.issueNumber3en_US
dc.citation.spage035003-8en_US
dc.citation.volumeNumber7en_US
dc.contributor.authorÇakıroğlu, Onur
dc.contributor.authorMehmood, Naveed
dc.contributor.authorÇiçek, Mert Miraç
dc.contributor.authorRasouli, Hamid Reza
dc.contributor.authorDurgun, Engin
dc.contributor.authorKasırga, T. Serkan
dc.contributor.authorAikebaier, Aizimaiti
dc.date.accessioned2021-02-21T14:31:53Z
dc.date.available2021-02-21T14:31:53Z
dc.date.issued2020
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractThermal conductivity measurement techniques for materials with nanoscale dimensions require fabrication of very complicated devices or their applicability is limited to a class of materials. Discovery of new methods with high thermal sensitivity are required for the widespread use of thermal conductivity measurements in characterizing materials' properties. We propose and demonstrate a simple non-destructive method with superior thermal sensitivity to measure the in-plane thermal conductivity of nanosheets and nanowires using the bolometric effect. The method utilizes laser beam heating to create a temperature gradient, as small as a fraction of a Kelvin, over the suspended section of the nanomaterial with electrical contacts. Local temperature rise due to the laser irradiation alters the electrical resistance of the device, which can be measured precisely. This resistance change is then used to extract the temperature profile along the nanomaterial using thermal conductivity as a fitting parameter. We measured the thermal conductivity of V2O3 nanosheets to validate the applicability of the method and found an excellent agreement with the literature. Further, we measured the thermal conductivity of metallic 2H-TaS2 for the first time and performed ab initio calculations to support our measurements. Finally, we discussed the applicability of the method on semiconducting nanosheets and performed measurements on WS2 and MoS2 thin flakes.en_US
dc.description.provenanceSubmitted by Evrim Ergin (eergin@bilkent.edu.tr) on 2021-02-21T14:31:53Z No. of bitstreams: 1 Thermal_conductivity_measurements_in_nanosheets_via_bolometric_effect.pdf: 1779467 bytes, checksum: 393ab7fcf1eedd7e622178d4356d9661 (MD5)en
dc.description.provenanceMade available in DSpace on 2021-02-21T14:31:53Z (GMT). No. of bitstreams: 1 Thermal_conductivity_measurements_in_nanosheets_via_bolometric_effect.pdf: 1779467 bytes, checksum: 393ab7fcf1eedd7e622178d4356d9661 (MD5) Previous issue date: 2020-03en
dc.identifier.doi10.1088/2053-1583/ab8048en_US
dc.identifier.issn2053-1583
dc.identifier.urihttp://hdl.handle.net/11693/75532
dc.language.isoEnglishen_US
dc.publisherIOP Publishing Ltden_US
dc.relation.isversionofhttps://dx.doi.org/10.1088/2053-1583/ab8048en_US
dc.source.title2D Materialsen_US
dc.subjectBolometricen_US
dc.subjectThermal conductivityen_US
dc.subjectNanosheeten_US
dc.subjectNanowireen_US
dc.subjectTantalum disulphideen_US
dc.subjectVanadium sesquoxideen_US
dc.subjectTransition metal dichalcogenidesen_US
dc.titleThermal conductivity measurements in nanosheets via bolometric effecten_US
dc.typeArticleen_US

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