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Photoacoustic thermal characterization of low thermal diffusivity thin films

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00006465
URN to cite this document: urn:nbn:de:bvb:703-epub-6465-4

Title data

Herrmann, Kai ; Pech-May, Nelson W. ; Retsch, Markus:
Photoacoustic thermal characterization of low thermal diffusivity thin films.
In: Photoacoustics. Vol. 22 (June 2021) . - No. 100246.
ISSN 2213-5979
DOI der Verlagsversion: https://doi.org/10.1016/j.pacs.2021.100246

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Project information

Project title:
Project's official titleProject's id
Open Access PublizierenNo information
SFB 840 - Von partikulären Nanosystemen zur MesotechnologieB7

Project financing: Deutsche Forschungsgemeinschaft

Abstract

The photoacoustic measurement technique is a powerful yet underrepresented method to characterize the thermal transport properties of thin films. For the case of isotropic low thermal diffusivity samples, such as glasses or polymers, we demonstrate a general approach to extract the thermal conductivity with a high degree of significance. We discuss in particular the influence of thermal effusivity, thermal diffusivity, and sample layer thickness on the significance and accuracy of this measurement technique. These fundamental thermal properties guide sample and substrate selection to allow for a feasible thermal transport characterization. Furthermore, our data evaluation allows us to directly extract the thermal conductivity from this transient technique, without separate determination of the volumetric heat capacity, when appropriate boundary conditions are fulfilled. Using silica, poly(methyl methacrylate) (PMMA) thin films, and various substrates (quartz, steel, and silicon), we verify the quantitative correctness of our analytical approach.

Further data

Item Type: Article in a journal
Keywords: Thermal conductivity; Thermal wave; Thermal transport metrology; Photoacoustic characterization; Effusivity mismatch; Thermal diffusivity; Thin film characterization; Nanoscale thermal transport
DDC Subjects: 500 Science
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry I
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Polymer and Colloid Science
Profile Fields > Emerging Fields
Profile Fields > Emerging Fields > Energy Research and Energy Technology
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Institute of Macromolecular Research - BIMF
Research Institutions > Research Centres > Bayreuth Center for Colloids and Interfaces - BZKG
Research Institutions > Affiliated Institutes
Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI)
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-6465-4
Date Deposited: 06 Jul 2022 08:32
Last Modified: 06 Jul 2022 08:32
URI: https://epub.uni-bayreuth.de/id/eprint/6465

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