Plasmonic gold nanoparticles (AuNPs) can convert laser irradiation into thermal energy for a variety of applications. Although heat transfer through the AuNP–water interface is considered an essential part of the plasmonic heating process, there is a lack of mechanistic understanding of how interface curvature and the heating itself impact interfacial heat transfer. Here, we report atomistic molecular dynamics simulations that investigate heat transfer through nanoscale gold–water interfaces. We simulated four nanoscale gold structures under various applied heat flux values to evaluate how gold–water interface curvature and temperature affect the interfacial heat transfer. We also considered a case in which we artificially reduced wetting at the gold surfaces by tuning the gold–water interactions to determine if such a perturbation alters the curvature and temperature dependence of the gold–water interfacial heat transfer. We first confirmed that interfacial heat transfer is particularly important for small particles (diameter nm). We found that the thermal interface conductance increases linearly with interface curvature regardless of the gold wettability, while it increases nonlinearly with the applied heat flux under normal wetting and remains constant under reduced wetting. Our analysis suggests the curvature dependence of the interface conductance coincides with changes in interfacial water adsorption, while the temperature dependence may arise from temperature-induced shifts in the distribution of water vibrational states. Our study advances the current understanding of interface thermal conductance for a broad range of applications.
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7 August 2022
Research Article|
August 04 2022
Curvature and temperature-dependent thermal interface conductance between nanoscale gold and water
Blake A. Wilson
;
Blake A. Wilson
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Mechanical Engineering, The University of Texas at Dallas
, Richardson, Texas 75080, USA
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Steven O. Nielsen
;
Steven O. Nielsen
(Conceptualization, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing)
2
Department of Chemistry and Biochemistry, The University of Texas at Dallas
, Richardson, Texas 75080, USA
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Jaona H. Randrianalisoa
;
Jaona H. Randrianalisoa
(Conceptualization, Methodology, Visualization, Writing – original draft, Writing – review & editing)
3
Institut de Thermique, Mécanique, Matériaux, Université de Reims Champagne-Ardenne
, Reims, France
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Zhenpeng Qin
Zhenpeng Qin
a)
(Conceptualization, Funding acquisition, Methodology, Supervision, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Mechanical Engineering, The University of Texas at Dallas
, Richardson, Texas 75080, USA
4
Department of Bioengineering, The University of Texas at Dallas
, Richardson, Texas 75080, USA
5
The Center for Advanced Pain Studies, The University of Texas at Dallas
, Richardson, Texas 75080, USA
6
Department of Surgery, The University of Texas at Southwestern Medical Center
, Dallas, Texas 75390, USA
a)Author to whom correspondence should be addressed: zhenpeng.qin@utdallas.edu
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a)Author to whom correspondence should be addressed: zhenpeng.qin@utdallas.edu
J. Chem. Phys. 157, 054703 (2022)
Article history
Received:
March 08 2022
Accepted:
June 27 2022
Citation
Blake A. Wilson, Steven O. Nielsen, Jaona H. Randrianalisoa, Zhenpeng Qin; Curvature and temperature-dependent thermal interface conductance between nanoscale gold and water. J. Chem. Phys. 7 August 2022; 157 (5): 054703. https://doi.org/10.1063/5.0090683
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