Phonon Conduction in Silicon Nanobeam Labyrinths

Abstract Here we study single-crystalline silicon nanobeams having 470 nm width and 80 nm thickness cross section, where we produce tortuous thermal paths (i.e. labyrinths) by introducing slits to control the impact of the unobstructed “line-of-sight” (LOS) between the heat source and heat sink. The...

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Autores principales:	Woosung Park, Giuseppe Romano, Ethan C. Ahn, Takashi Kodama, Joonsuk Park, Michael T. Barako, Joon Sohn, Soo Jin Kim, Jungwan Cho, Amy M. Marconnet, Mehdi Asheghi, Alexie M. Kolpak, Kenneth E. Goodson
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a37f7acf0ba04833997a9c8eac48e890
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spelling	oai:doaj.org-article:a37f7acf0ba04833997a9c8eac48e8902021-12-02T16:06:23ZPhonon Conduction in Silicon Nanobeam Labyrinths10.1038/s41598-017-06479-32045-2322https://doaj.org/article/a37f7acf0ba04833997a9c8eac48e8902017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-06479-3https://doaj.org/toc/2045-2322Abstract Here we study single-crystalline silicon nanobeams having 470 nm width and 80 nm thickness cross section, where we produce tortuous thermal paths (i.e. labyrinths) by introducing slits to control the impact of the unobstructed “line-of-sight” (LOS) between the heat source and heat sink. The labyrinths range from straight nanobeams with a complete LOS along the entire length to nanobeams in which the LOS ranges from partially to entirely blocked by introducing slits, s = 95, 195, 245, 295 and 395 nm. The measured thermal conductivity of the samples decreases monotonically from ~47 W m−1 K−1 for straight beam to ~31 W m−1 K−1 for slit width of 395 nm. A model prediction through a combination of the Boltzmann transport equation and ab initio calculations shows an excellent agreement with the experimental data to within ~8%. The model prediction for the most tortuous path (s = 395 nm) is reduced by ~14% compared to a straight beam of equivalent cross section. This study suggests that LOS is an important metric for characterizing and interpreting phonon propagation in nanostructures.Woosung ParkGiuseppe RomanoEthan C. AhnTakashi KodamaJoonsuk ParkMichael T. BarakoJoon SohnSoo Jin KimJungwan ChoAmy M. MarconnetMehdi AsheghiAlexie M. KolpakKenneth E. GoodsonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Woosung Park Giuseppe Romano Ethan C. Ahn Takashi Kodama Joonsuk Park Michael T. Barako Joon Sohn Soo Jin Kim Jungwan Cho Amy M. Marconnet Mehdi Asheghi Alexie M. Kolpak Kenneth E. Goodson Phonon Conduction in Silicon Nanobeam Labyrinths
description	Abstract Here we study single-crystalline silicon nanobeams having 470 nm width and 80 nm thickness cross section, where we produce tortuous thermal paths (i.e. labyrinths) by introducing slits to control the impact of the unobstructed “line-of-sight” (LOS) between the heat source and heat sink. The labyrinths range from straight nanobeams with a complete LOS along the entire length to nanobeams in which the LOS ranges from partially to entirely blocked by introducing slits, s = 95, 195, 245, 295 and 395 nm. The measured thermal conductivity of the samples decreases monotonically from ~47 W m−1 K−1 for straight beam to ~31 W m−1 K−1 for slit width of 395 nm. A model prediction through a combination of the Boltzmann transport equation and ab initio calculations shows an excellent agreement with the experimental data to within ~8%. The model prediction for the most tortuous path (s = 395 nm) is reduced by ~14% compared to a straight beam of equivalent cross section. This study suggests that LOS is an important metric for characterizing and interpreting phonon propagation in nanostructures.
format	article
author	Woosung Park Giuseppe Romano Ethan C. Ahn Takashi Kodama Joonsuk Park Michael T. Barako Joon Sohn Soo Jin Kim Jungwan Cho Amy M. Marconnet Mehdi Asheghi Alexie M. Kolpak Kenneth E. Goodson
author_facet	Woosung Park Giuseppe Romano Ethan C. Ahn Takashi Kodama Joonsuk Park Michael T. Barako Joon Sohn Soo Jin Kim Jungwan Cho Amy M. Marconnet Mehdi Asheghi Alexie M. Kolpak Kenneth E. Goodson
author_sort	Woosung Park
title	Phonon Conduction in Silicon Nanobeam Labyrinths
title_short	Phonon Conduction in Silicon Nanobeam Labyrinths
title_full	Phonon Conduction in Silicon Nanobeam Labyrinths
title_fullStr	Phonon Conduction in Silicon Nanobeam Labyrinths
title_full_unstemmed	Phonon Conduction in Silicon Nanobeam Labyrinths
title_sort	phonon conduction in silicon nanobeam labyrinths
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a37f7acf0ba04833997a9c8eac48e890
work_keys_str_mv	AT woosungpark phononconductioninsiliconnanobeamlabyrinths AT giusepperomano phononconductioninsiliconnanobeamlabyrinths AT ethancahn phononconductioninsiliconnanobeamlabyrinths AT takashikodama phononconductioninsiliconnanobeamlabyrinths AT joonsukpark phononconductioninsiliconnanobeamlabyrinths AT michaeltbarako phononconductioninsiliconnanobeamlabyrinths AT joonsohn phononconductioninsiliconnanobeamlabyrinths AT soojinkim phononconductioninsiliconnanobeamlabyrinths AT jungwancho phononconductioninsiliconnanobeamlabyrinths AT amymmarconnet phononconductioninsiliconnanobeamlabyrinths AT mehdiasheghi phononconductioninsiliconnanobeamlabyrinths AT alexiemkolpak phononconductioninsiliconnanobeamlabyrinths AT kennethegoodson phononconductioninsiliconnanobeamlabyrinths
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Phonon Conduction in Silicon Nanobeam Labyrinths

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