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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

INFLUENCE OF METAL NANOPARTICLE (MNP) MORPHOLOGY ON ITS RADIANT ABSORPTION AND THERMAL EQUILIBRIUM TEMPERATURE

Get access (open in a dialog) DOI: 10.1615/IHTC16.rti.023420
pages 8345-8354

Аннотация

The work in this paper is focused on the nanoscale localized heating of an irradiated metal nanoparticle. The influence of several morphologies, such as cylinder, ellipsoid, disk, polyhedron et. al. are considered. Take Au nanoparticle immersed in water as example, the amount of radiant absorption is estimated based on electromagnetic theory, the nanoparticle size and shape dependence of radiant absorption spectra is analyzed by using finite element based Comsol Multiphysics software. The temperature increase of nanoparticle and surrounding media is simulated by heat transfer model, where the energy source in the model is from radiant absorption. The simulated results show that, the metal nanoparticle with the morphology of polyhedron has higher absorption efficiency (Qabs). However, the nanoparticle with higher absorption efficiency does not necessarily stay in higher equilibrium temperature. Because the heat transfer from nanoparticle to surrounding media is also influenced by the radiant absorption distribution, which is influenced by the shape of metal nanoparticle.