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Thermal transport across nanoparticle-fluid interfaces: the interplay of interfacial curvature and nanoparticle-fluid interactions

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Title: Thermal transport across nanoparticle-fluid interfaces: the interplay of interfacial curvature and nanoparticle-fluid interactions
Authors: Tascini, AS
Armstrong, J
Chiavazzo, E
Fasano, M
Asinari, P
Bresme, F
Item Type: Journal Article
Abstract: We investigate the general dependence of the thermal transport across nanoparticle–fluid interfaces using molecular dynamics computations. We show that the thermal conductance depends strongly both on the wetting characteristics of the nanoparticle–fluid interface and on the nanoparticle size. Strong nanoparticle–fluid interactions, leading to full wetting states in the host fluid, result in high thermal conductances and efficient interfacial transport of heat. Weak interactions result in partial drying or full drying states, and low thermal conductances. The variation of the thermal conductance with particle size is found to depend on the fluid–nanoparticle interactions. Strong interactions coupled with large interfacial curvatures lead to optimum interfacial heat transport. This complex dependence can be modelled using an equation that includes the interfacial curvature as a parameter. In this way, we rationalise the existing experimental and computer simulation results and show that the thermal transport across nanoscale interfaces is determined by the correlations of both interfacial curvature and nanoparticle–fluid interactions.
Issue Date: 21-Dec-2016
Date of Acceptance: 20-Dec-2016
URI: http://hdl.handle.net/10044/1/45343
DOI: https://dx.doi.org/10.1039/c6cp06403e
ISSN: 1463-9084
Publisher: Royal Society of Chemistry
Start Page: 3244
End Page: 3253
Journal / Book Title: Physical Chemistry Chemical Physics
Volume: 19
Issue: 4
Copyright Statement: This journal is © the Owner Societies 2017
Keywords: Science & Technology
Physical Sciences
Chemistry, Physical
Physics, Atomic, Molecular & Chemical
Chemistry
Physics
NONEQUILIBRIUM MOLECULAR-DYNAMICS
LIQUID-SOLID INTERFACE
RESISTANCE
SIMULATION
SURFACE
STATE
Chemical Physics
02 Physical Sciences
03 Chemical Sciences
Publication Status: Published
Appears in Collections:Chemistry
Faculty of Natural Sciences