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Four terminal devices for anisotropic thermal transport experiments

de Vito, Giulio. Four terminal devices for anisotropic thermal transport experiments. 2024, Doctoral Thesis, University of Basel, Faculty of Science.

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Official URL: https://edoc.unibas.ch/96813/

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Abstract

The investigation of heat flow in nanostructures and low-dimensional system is one of the major challenge in microtechnology. However, the deviation of miniaturization trend of transistors fromtheMoore’s law indicates the increasing importance of an effective thermal management of microdevices. Therefore, the examination of the heat properties of different nano-size materials is paving the way for more efficient microchips. To guide these efforts, it is of uttermost importance to characterize the intrinsic properties of the materials with a consistent and reliable method with a high signal-to-noise ratio. To meet these requirements, a novel four-terminal device is proposed which involves fabricating suspended four transducers, which can act as thermometer as well as heater, combined with the suspension of a two-dimensional material. In this work, we present the fabrication and characterization of a device designed to measure the in-plane thermal properties of nanomaterials in multiple directions. Additionally, the device allows to perform electrical and optical measurements simultaneously. This allows to spatially resolve eventual thermal property anisotropies and the correction of measurements by accounting for the contact resistances.
Advisors:Zardo, Ilaria
Committee Members:Calame, Michel and Lopeandia, Aitor
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Material Physics (Zardo)
UniBasel Contributors:Zardo, Ilaria and Calame, Michel
Item Type:Thesis
Thesis Subtype:Doctoral Thesis
Thesis no:15586
Thesis status:Complete
Number of Pages:xiv, 155
Language:English
Identification Number:
  • urn: urn:nbn:ch:bel-bau-diss155860
edoc DOI:
Last Modified:25 Jan 2025 05:30
Deposited On:24 Jan 2025 10:41

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