Photoacoustic thermal characterization of low thermal diffusivity thin films
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 conductiv...
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2021-06-01
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Online Access: | http://www.sciencedirect.com/science/article/pii/S2213597921000082 |
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doaj-7a5a4fd80fcf4e0da61d8ddb35d0d96c2021-05-26T04:26:34ZengElsevierPhotoacoustics2213-59792021-06-0122100246Photoacoustic thermal characterization of low thermal diffusivity thin filmsK. Herrmann0N.W. Pech-May1M. Retsch2Department of Chemistry, Physical Chemistry 1, University of Bayreuth, 95440 Bayreuth, GermanyBundesanstalt für Materialforschung und -prüfung (BAM), 12200 Berlin, GermanyDepartment of Chemistry, Physical Chemistry 1, University of Bayreuth, 95440 Bayreuth, Germany; Corresponding author.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.http://www.sciencedirect.com/science/article/pii/S2213597921000082Thermal conductivityThermal waveThermal transport metrologyPhotoacoustic characterizationEffusivity mismatchThermal diffusivity |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
K. Herrmann N.W. Pech-May M. Retsch |
spellingShingle |
K. Herrmann N.W. Pech-May M. Retsch Photoacoustic thermal characterization of low thermal diffusivity thin films Photoacoustics Thermal conductivity Thermal wave Thermal transport metrology Photoacoustic characterization Effusivity mismatch Thermal diffusivity |
author_facet |
K. Herrmann N.W. Pech-May M. Retsch |
author_sort |
K. Herrmann |
title |
Photoacoustic thermal characterization of low thermal diffusivity thin films |
title_short |
Photoacoustic thermal characterization of low thermal diffusivity thin films |
title_full |
Photoacoustic thermal characterization of low thermal diffusivity thin films |
title_fullStr |
Photoacoustic thermal characterization of low thermal diffusivity thin films |
title_full_unstemmed |
Photoacoustic thermal characterization of low thermal diffusivity thin films |
title_sort |
photoacoustic thermal characterization of low thermal diffusivity thin films |
publisher |
Elsevier |
series |
Photoacoustics |
issn |
2213-5979 |
publishDate |
2021-06-01 |
description |
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. |
topic |
Thermal conductivity Thermal wave Thermal transport metrology Photoacoustic characterization Effusivity mismatch Thermal diffusivity |
url |
http://www.sciencedirect.com/science/article/pii/S2213597921000082 |
work_keys_str_mv |
AT kherrmann photoacousticthermalcharacterizationoflowthermaldiffusivitythinfilms AT nwpechmay photoacousticthermalcharacterizationoflowthermaldiffusivitythinfilms AT mretsch photoacousticthermalcharacterizationoflowthermaldiffusivitythinfilms |
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1721426630157533184 |