Phonon Conduction in Silicon Nanobeam Labyrinths
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. Th...
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| 其他作者: | |
| 格式: | 文件 |
| 出版: |
Nature Publishing Group
2018
|
| 在线阅读: | http://hdl.handle.net/1721.1/113683 https://orcid.org/0000-0002-4347-0139 |
| _version_ | 1826203594240557056 |
|---|---|
| author | Park, Woosung Romano, Giuseppe Ahn, Ethan C. Kodama, Takashi Park, Joonsuk Barako, Michael T. Sohn, Joon Kim, Soo Jin Cho, Jungwan Marconnet, Amy M. Asheghi, Mehdi Kolpak, Alexie M. Goodson, Kenneth E. |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Park, Woosung Romano, Giuseppe Ahn, Ethan C. Kodama, Takashi Park, Joonsuk Barako, Michael T. Sohn, Joon Kim, Soo Jin Cho, Jungwan Marconnet, Amy M. Asheghi, Mehdi Kolpak, Alexie M. Goodson, Kenneth E. |
| author_sort | Park, Woosung |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T12:39:46Z |
| format | Article |
| id | mit-1721.1/113683 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T12:39:46Z |
| publishDate | 2018 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1136832022-09-28T09:18:52Z Phonon Conduction in Silicon Nanobeam Labyrinths Park, Woosung Romano, Giuseppe Ahn, Ethan C. Kodama, Takashi Park, Joonsuk Barako, Michael T. Sohn, Joon Kim, Soo Jin Cho, Jungwan Marconnet, Amy M. Asheghi, Mehdi Kolpak, Alexie M. Goodson, Kenneth E. Massachusetts Institute of Technology. Department of Mechanical Engineering Romano, Giuseppe Kolpak, Alexie M. 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. National Science Foundation (U.S.) (Grant 1336734) United States. Department of Energy. Office of Basic Energy Sciences (Award DE-SC0001299) United States. Department of Energy. Office of Basic Energy Sciences (Award DE-FG02-09ER46577) 2018-02-15T16:03:40Z 2018-02-15T16:03:40Z 2017-07 2017-03 2018-02-09T17:41:23Z Article http://purl.org/eprint/type/JournalArticle 2045-2322 http://hdl.handle.net/1721.1/113683 Park, Woosung et al. “Phonon Conduction in Silicon Nanobeam Labyrinths.” Scientific Reports 7, 1 (July 2017): 6233 © 2017 The Author(s) https://orcid.org/0000-0002-4347-0139 http://dx.doi.org/10.1038/S41598-017-06479-3 Scientific Reports Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group |
| spellingShingle | Park, Woosung Romano, Giuseppe Ahn, Ethan C. Kodama, Takashi Park, Joonsuk Barako, Michael T. Sohn, Joon Kim, Soo Jin Cho, Jungwan Marconnet, Amy M. Asheghi, Mehdi Kolpak, Alexie M. Goodson, Kenneth E. Phonon Conduction in Silicon Nanobeam Labyrinths |
| title | 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_short | Phonon Conduction in Silicon Nanobeam Labyrinths |
| title_sort | phonon conduction in silicon nanobeam labyrinths |
| url | http://hdl.handle.net/1721.1/113683 https://orcid.org/0000-0002-4347-0139 |
| work_keys_str_mv | AT parkwoosung phononconductioninsiliconnanobeamlabyrinths AT romanogiuseppe phononconductioninsiliconnanobeamlabyrinths AT ahnethanc phononconductioninsiliconnanobeamlabyrinths AT kodamatakashi phononconductioninsiliconnanobeamlabyrinths AT parkjoonsuk phononconductioninsiliconnanobeamlabyrinths AT barakomichaelt phononconductioninsiliconnanobeamlabyrinths AT sohnjoon phononconductioninsiliconnanobeamlabyrinths AT kimsoojin phononconductioninsiliconnanobeamlabyrinths AT chojungwan phononconductioninsiliconnanobeamlabyrinths AT marconnetamym phononconductioninsiliconnanobeamlabyrinths AT asheghimehdi phononconductioninsiliconnanobeamlabyrinths AT kolpakalexiem phononconductioninsiliconnanobeamlabyrinths AT goodsonkennethe phononconductioninsiliconnanobeamlabyrinths |