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Measuring the thermal conductivity of porous, transparent SiO2 films with time domain thermoreflectance / Patrick E. Hopkins in Journal of heat transfer, Vol. 133 N° 6 (Juin 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 6 (Juin 2011) . - pp. [061601/1-8] Titre : Measuring the thermal conductivity of porous, transparent SiO2 films with time domain thermoreflectance Type de document : texte imprimé Auteurs : Patrick E. Hopkins, Auteur ; Bryan Kaehr, Auteur ; Leslie M. Phinney, Auteur Année de publication : 2011 Article en page(s) : pp. [061601/1-8] Note générale : Physique Langues : Anglais (eng) Mots-clés : Time  domain  thermoreflectance  Thermal  conductivity  Differentail-effective  medium  theory  Porous  SiO2 Index. décimale : 536 Chaleur. Thermodynamique Résumé : Nanocomposites offer unique capabilities of controlling thermal transport through the manipulation of various structural aspects of the material. However, measurements of the thermal properties of these composites are often difficult, especially porous nanomaterials. Optical measurements of these properties, although ideal due to the noncontact nature, are challenging due to the large surface variability of nanoporous structures. In this work, we use a vector-based thermal algorithm to solve for the temperature change and heat transfer in which a thin film subjected to a modulated heat source is sandwiched between two thermally conductive pathways. We validate our solution with time domain thermoreflectance measurements on glass slides and extend the thermal conductivity measurements to SiO2-based nanostructured films. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Measuring the thermal conductivity of porous, transparent SiO2 films with time domain thermoreflectance [texte imprimé] / Patrick E. Hopkins, Auteur ; Bryan Kaehr, Auteur ; Leslie M. Phinney, Auteur . - 2011 . - pp. [061601/1-8]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 6 (Juin 2011) . - pp. [061601/1-8] Mots-clés : Time  domain  thermoreflectance  Thermal  conductivity  Differentail-effective  medium  theory  Porous  SiO2 Index. décimale : 536 Chaleur. Thermodynamique Résumé : Nanocomposites offer unique capabilities of controlling thermal transport through the manipulation of various structural aspects of the material. However, measurements of the thermal properties of these composites are often difficult, especially porous nanomaterials. Optical measurements of these properties, although ideal due to the noncontact nature, are challenging due to the large surface variability of nanoporous structures. In this work, we use a vector-based thermal algorithm to solve for the temperature change and heat transfer in which a thin film subjected to a modulated heat source is sandwiched between two thermally conductive pathways. We validate our solution with time domain thermoreflectance measurements on glass slides and extend the thermal conductivity measurements to SiO2-based nanostructured films. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]