Role of radiation in heat transfer from nanoparticles to gas media in photothermal measurements

Qing Xi (), Yunyun Li, Jun Zhou (), Baowen Li () and Jun Liu
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Qing Xi: Center for Phononics and Thermal Energy Science, China-EU Joint Lab for Nanophononics, Shanghai Key Laboratory of Special Artificial, Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, P. R. China
Yunyun Li: Center for Phononics and Thermal Energy Science, China-EU Joint Lab for Nanophononics, Shanghai Key Laboratory of Special Artificial, Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, P. R. China
Jun Zhou: Center for Phononics and Thermal Energy Science, China-EU Joint Lab for Nanophononics, Shanghai Key Laboratory of Special Artificial, Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, P. R. China
Baowen Li: #x2020;Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, CO 80389, America
Jun Liu: #x2021;Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, North Carolina 27695, America

International Journal of Modern Physics C (IJMPC), 2019, vol. 30, issue 04, 1-9

Abstract: The heat transfer from nanoparticles (NPs) to gas of photothermal effect is investigated by taking into account both conduction and radiation. The steady-state and unsteady-state heat transfer processes are studied analytically and numerically, respectively. In contrast to the photothermal effect in liquid with metal NPs, in which the radiation is negligible, we found that the thermal radiation must be taken into account in the nanoparticle–gas system. The reason is that the thermal boundary conductance (TBC) of gas–solid interface is several orders of magnitude smaller than the TBC of liquid–solid interface, especially when the diameter of nanoparticle is comparable to or smaller than the mean free path of gas molecules. We propose a method to measure the ultra-low TBC of interface between nanoparticle and gas based on our investigations.

Keywords: Photothermal effect; nanoparticles; thermal boundary conductance; thermal radiation (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0129183119500244

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