We present a numerical model allowing to determine the electron and lattice temperature dynamics in a gold nanoparticle under subpicosecond pulsed excitation, as well as that of the surrounding medium. For this, we have used the electron-phonon coupling equation in the particle with a source term linked with the laser pulse, and the ballistic-diffusive equations for heat conduction in the host medium. Our results show that the heat transfer rate from the particle to the matrix is significantly smaller than the prediction of Fourier’s law. Consequently, the particle temperature rise is much larger and its cooling dynamics is much slower than that obtained using Fourier’s law, which is attributed to the nonlocal and nonequilibrium heat conduction in the vicinity of the nanoparticle. These results are expected to be of great importance for interpreting pump-probe experiments performed on single nanoparticles or nanocomposite media.
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ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer
June 6–9, 2008
Tainan, Taiwan
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4292-4
PROCEEDINGS PAPER
Cooling Dynamics of a Gold Nanoparticle in a Host Medium Under Ultrafast Laser Pulse Excitation: A Ballistic-Diffusive Approach
Majid Rashidi-Huyeh
,
Majid Rashidi-Huyeh
E´cole Centrale de Paris, Chaˆtenay-Malabry, France; Universite´ Pierre et Marie Curie, Paris, France; University of Sistan and Baluchistan, Zahedan, Iran
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Sebastian Volz
,
Sebastian Volz
E´cole Centrale de Paris, Chaˆtenay-Malabry, France
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Bruno Palpant
Bruno Palpant
Universite´ Pierre et Marie Curie, Paris, France
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Majid Rashidi-Huyeh
E´cole Centrale de Paris, Chaˆtenay-Malabry, France; Universite´ Pierre et Marie Curie, Paris, France; University of Sistan and Baluchistan, Zahedan, Iran
Sebastian Volz
E´cole Centrale de Paris, Chaˆtenay-Malabry, France
Bruno Palpant
Universite´ Pierre et Marie Curie, Paris, France
Paper No:
MNHT2008-52228, pp. 389-393; 5 pages
Published Online:
June 22, 2009
Citation
Rashidi-Huyeh, M, Volz, S, & Palpant, B. "Cooling Dynamics of a Gold Nanoparticle in a Host Medium Under Ultrafast Laser Pulse Excitation: A Ballistic-Diffusive Approach." Proceedings of the ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer. ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B. Tainan, Taiwan. June 6–9, 2008. pp. 389-393. ASME. https://doi.org/10.1115/MNHT2008-52228
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