On the linear dependence of a carbon nanofiber thermal conductivity on wall thickness
Thermal transport in carbon nanofibers (CNFs) was thoroughly investigated. In particular, individual CNFs were suspended on T-type heat nanosensors and their thermal conductivity was measured over a range of temperatures. Unexpectedly, thermal conductivity was found to be dependent on CNF wall thick...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2016-11-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4968831 |
| _version_ | 1819101915756101632 |
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| author | Alexandros Askounis Yutaka Yamada Tatsuya Ikuta Koji Takahashi Yasuyuki Takata Khellil Sefiane |
| author_facet | Alexandros Askounis Yutaka Yamada Tatsuya Ikuta Koji Takahashi Yasuyuki Takata Khellil Sefiane |
| author_sort | Alexandros Askounis |
| collection | DOAJ |
| description | Thermal transport in carbon nanofibers (CNFs) was thoroughly investigated. In particular, individual CNFs were suspended on T-type heat nanosensors and their thermal conductivity was measured over a range of temperatures. Unexpectedly, thermal conductivity was found to be dependent on CNF wall thickness and ranging between ca. 28 and 43 W/(m⋅K). Further investigation of the CNF walls with high resolution electron microscopy allowed us to propose a tentative description of how wall structure affects phonon heat transport inside CNFs. The lower thermal conductivities, compared to other CNTs, was attributed to unique CNF wall structure. Additionally, wall thickness is related to the conducting lattice length of each constituent graphene cone and comparable to the Umklapp length. Hence, as the wall thickness and thus lattice length increases there is a higher probability for phonon scattering to the next layer. |
| first_indexed | 2024-12-22T01:26:15Z |
| format | Article |
| id | doaj.art-d440c9fcacbb4d9698c2c03e3f7554ea |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-22T01:26:15Z |
| publishDate | 2016-11-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-d440c9fcacbb4d9698c2c03e3f7554ea2022-12-21T18:43:36ZengAIP Publishing LLCAIP Advances2158-32262016-11-01611115119115119-610.1063/1.4968831076611ADVOn the linear dependence of a carbon nanofiber thermal conductivity on wall thicknessAlexandros Askounis0Yutaka Yamada1Tatsuya Ikuta2Koji Takahashi3Yasuyuki Takata4Khellil Sefiane5International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, JapanGraduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, JapanInternational Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, JapanInternational Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, JapanInternational Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, JapanInstitute for Materials and Processes, School of Engineering, The University of Edinburgh, King’s Buildings, Robert Stevenson Road, Edinburgh EH9 3BF, United KingdomThermal transport in carbon nanofibers (CNFs) was thoroughly investigated. In particular, individual CNFs were suspended on T-type heat nanosensors and their thermal conductivity was measured over a range of temperatures. Unexpectedly, thermal conductivity was found to be dependent on CNF wall thickness and ranging between ca. 28 and 43 W/(m⋅K). Further investigation of the CNF walls with high resolution electron microscopy allowed us to propose a tentative description of how wall structure affects phonon heat transport inside CNFs. The lower thermal conductivities, compared to other CNTs, was attributed to unique CNF wall structure. Additionally, wall thickness is related to the conducting lattice length of each constituent graphene cone and comparable to the Umklapp length. Hence, as the wall thickness and thus lattice length increases there is a higher probability for phonon scattering to the next layer.http://dx.doi.org/10.1063/1.4968831 |
| spellingShingle | Alexandros Askounis Yutaka Yamada Tatsuya Ikuta Koji Takahashi Yasuyuki Takata Khellil Sefiane On the linear dependence of a carbon nanofiber thermal conductivity on wall thickness AIP Advances |
| title | On the linear dependence of a carbon nanofiber thermal conductivity on wall thickness |
| title_full | On the linear dependence of a carbon nanofiber thermal conductivity on wall thickness |
| title_fullStr | On the linear dependence of a carbon nanofiber thermal conductivity on wall thickness |
| title_full_unstemmed | On the linear dependence of a carbon nanofiber thermal conductivity on wall thickness |
| title_short | On the linear dependence of a carbon nanofiber thermal conductivity on wall thickness |
| title_sort | on the linear dependence of a carbon nanofiber thermal conductivity on wall thickness |
| url | http://dx.doi.org/10.1063/1.4968831 |
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