Measuring the Thermal Conductivity of Porous, Transparent SiO2 Films With Time Domain Thermoreflectance

Autor:	Anne Grillet, Fred L. Garcia, C. Jeffrey Brinker, Patrick E. Hopkins, Leslie M. Phinney, Timothy P. Koehler, Bryan Kaehr, Darren R. Dunphy
Rok vydání:	2011
Předmět:	Nanocomposite Materials science business.industry Nanoporous Mechanical Engineering Time-domain thermoreflectance Condensed Matter Physics Thermal conductivity Optics Mechanics of Materials Heat transfer Thermal Optoelectronics General Materials Science Thin film business Electrical conductor
Zdroj:	Journal of Heat Transfer. 133
ISSN:	1528-8943 0022-1481
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::771fb91638fc2a7d7ff15e9d3a48ee3f https://doi.org/10.1115/1.4003548 Zobrazit plný text záznamu