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Heat transfer from freely suspended bimaterial microcantilevers / Arvind Narayanaswamy in Journal of heat transfer, Vol. 133 N° 4 (Avril 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 4 (Avril 2011) . - pp. [042401/1-6] Titre : Heat transfer from freely suspended bimaterial microcantilevers Type de document : texte imprimé Auteurs : Arvind Narayanaswamy, Auteur ; Ning Gu, Auteur Année de publication : 2011 Article en page(s) : pp. [042401/1-6] Note générale : Physique Langues : Anglais (eng) Mots-clés : Thermal  conductance  Heated  microcantilever  Photothermal  heating  Atomic  force  microscope Index. décimale : 536 Chaleur. Thermodynamique Résumé : Bimaterial atomic force microscope cantilevers have been used extensively over the last 15 years as physical, chemical, and biological sensors. As a thermal sensor, the static deflection of bimaterial cantilevers, due to the mismatch of the coefficient of thermal expansion between the two materials, has been used to measure temperature changes as small as 10−6 K, heat transfer rate as small as 40 pW, and energy changes as small as 10 fJ. Bimaterial cantilevers have also been used to measure “heat transfer-distance” curves—a heat transfer analogy of the force-distance curves obtained using atomic force microscopes. In this work, we concentrate on the characterization of heat transfer from the microcantilever. The thermomechanical response of a bimaterial cantilever is used to determine the (1) thermal conductance of a bimaterial cantilever, and (2) overall thermal conductance from the cantilever to the ambient. The thermal conductance of a rectangular gold coated silicon nitride cantilever is Gc=4.09±0.04 µW K−1. The overall thermal conductance from the cantilever to the ambient (at atmospheric pressure) is Ga=55.05±0.69 µW K−1. The effective heat transfer coefficient from the cantilever to the ambient (at atmospheric pressure) is determined to be [approximate]3400 W m−2 K−1. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...] [article] Heat transfer from freely suspended bimaterial microcantilevers [texte imprimé] / Arvind Narayanaswamy, Auteur ; Ning Gu, Auteur . - 2011 . - pp. [042401/1-6]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 4 (Avril 2011) . - pp. [042401/1-6] Mots-clés : Thermal  conductance  Heated  microcantilever  Photothermal  heating  Atomic  force  microscope Index. décimale : 536 Chaleur. Thermodynamique Résumé : Bimaterial atomic force microscope cantilevers have been used extensively over the last 15 years as physical, chemical, and biological sensors. As a thermal sensor, the static deflection of bimaterial cantilevers, due to the mismatch of the coefficient of thermal expansion between the two materials, has been used to measure temperature changes as small as 10−6 K, heat transfer rate as small as 40 pW, and energy changes as small as 10 fJ. Bimaterial cantilevers have also been used to measure “heat transfer-distance” curves—a heat transfer analogy of the force-distance curves obtained using atomic force microscopes. In this work, we concentrate on the characterization of heat transfer from the microcantilever. The thermomechanical response of a bimaterial cantilever is used to determine the (1) thermal conductance of a bimaterial cantilever, and (2) overall thermal conductance from the cantilever to the ambient. The thermal conductance of a rectangular gold coated silicon nitride cantilever is Gc=4.09±0.04 µW K−1. The overall thermal conductance from the cantilever to the ambient (at atmospheric pressure) is Ga=55.05±0.69 µW K−1. The effective heat transfer coefficient from the cantilever to the ambient (at atmospheric pressure) is determined to be [approximate]3400 W m−2 K−1. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...]