Impact of carbon nanotube length on electron transport in aligned carbon nanotube networks
Here, we quantify the electron transport properties of aligned carbon nanotube (CNT) networks as a function of the CNT length, where the electrical conductivities may be tuned by up to 10× with anisotropies exceeding 40%. Testing at elevated temperatures demonstrates that the aligned CNT networks ha...
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| Format: | Article |
| Language: | en_US |
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American Institute of Physics (AIP)
2015
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| Online Access: | http://hdl.handle.net/1721.1/96369 https://orcid.org/0000-0003-3229-7315 https://orcid.org/0000-0003-3530-5819 https://orcid.org/0000-0002-1268-4492 https://orcid.org/0000-0003-4735-2153 |
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| author | Lee, Jeonyoon Stein, Itai Y. Devoe, Mackenzie E. Lewis, Diana Jean Lachman-Senesh, Noa Buschhorn, Samuel T. Wardle, Brian L. |
| author2 | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics |
| author_facet | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Lee, Jeonyoon Stein, Itai Y. Devoe, Mackenzie E. Lewis, Diana Jean Lachman-Senesh, Noa Buschhorn, Samuel T. Wardle, Brian L. |
| author_sort | Lee, Jeonyoon |
| collection | MIT |
| description | Here, we quantify the electron transport properties of aligned carbon nanotube (CNT) networks as a function of the CNT length, where the electrical conductivities may be tuned by up to 10× with anisotropies exceeding 40%. Testing at elevated temperatures demonstrates that the aligned CNT networks have a negative temperature coefficient of resistance, and application of the fluctuation induced tunneling model leads to an activation energy of ≈14 meV for electron tunneling at the CNT-CNT junctions. Since the tunneling activation energy is shown to be independent of both CNT length and orientation, the variation in electron transport is attributed to the number of CNT-CNT junctions an electron must tunnel through during its percolated path, which is proportional to the morphology of the aligned CNT network. |
| first_indexed | 2024-09-23T09:53:50Z |
| format | Article |
| id | mit-1721.1/96369 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:53:50Z |
| publishDate | 2015 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/963692022-09-30T17:32:53Z Impact of carbon nanotube length on electron transport in aligned carbon nanotube networks Lee, Jeonyoon Stein, Itai Y. Devoe, Mackenzie E. Lewis, Diana Jean Lachman-Senesh, Noa Buschhorn, Samuel T. Wardle, Brian L. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering Stein, Itai Y. Lee, Jeonyoon Stein, Itai Y. Devoe, Mackenzie E. Lewis, Diana Jean Lachman-Senesh, Noa Buschhorn, Samuel T. Wardle, Brian L. Here, we quantify the electron transport properties of aligned carbon nanotube (CNT) networks as a function of the CNT length, where the electrical conductivities may be tuned by up to 10× with anisotropies exceeding 40%. Testing at elevated temperatures demonstrates that the aligned CNT networks have a negative temperature coefficient of resistance, and application of the fluctuation induced tunneling model leads to an activation energy of ≈14 meV for electron tunneling at the CNT-CNT junctions. Since the tunneling activation energy is shown to be independent of both CNT length and orientation, the variation in electron transport is attributed to the number of CNT-CNT junctions an electron must tunnel through during its percolated path, which is proportional to the morphology of the aligned CNT network. United States. Army Research Office (contract W911NF-07-D-0004) United States. Army Research Office (contract W911NF-13-D-0001) United States. Air Force Office of Scientific Research (AFRL/RX contract FA8650-11-D-5800, Task Order 0003) National Science Foundation (U.S.) (NSF Award No. ECS-0335765) United States. Dept. of Defense (National Defense Science and Engineering Graduate Fellowship) 2015-04-03T14:57:00Z 2015-04-03T14:57:00Z 2015-02 2014-10 Article http://purl.org/eprint/type/JournalArticle 0003-6951 1077-3118 http://hdl.handle.net/1721.1/96369 Lee, Jeonyoon, Itai Y. Stein, Mackenzie E. Devoe, Diana J. Lewis, Noa Lachman, Seth S. Kessler, Samuel T. Buschhorn, and Brian L. Wardle. “Impact of Carbon Nanotube Length on Electron Transport in Aligned Carbon Nanotube Networks.” Appl. Phys. Lett. 106, no. 5 (February 2, 2015): 053110. https://orcid.org/0000-0003-3229-7315 https://orcid.org/0000-0003-3530-5819 https://orcid.org/0000-0002-1268-4492 https://orcid.org/0000-0003-4735-2153 en_US http://dx.doi.org/10.1063/1.4907608 Applied Physics Letters Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf American Institute of Physics (AIP) Stein |
| spellingShingle | Lee, Jeonyoon Stein, Itai Y. Devoe, Mackenzie E. Lewis, Diana Jean Lachman-Senesh, Noa Buschhorn, Samuel T. Wardle, Brian L. Impact of carbon nanotube length on electron transport in aligned carbon nanotube networks |
| title | Impact of carbon nanotube length on electron transport in aligned carbon nanotube networks |
| title_full | Impact of carbon nanotube length on electron transport in aligned carbon nanotube networks |
| title_fullStr | Impact of carbon nanotube length on electron transport in aligned carbon nanotube networks |
| title_full_unstemmed | Impact of carbon nanotube length on electron transport in aligned carbon nanotube networks |
| title_short | Impact of carbon nanotube length on electron transport in aligned carbon nanotube networks |
| title_sort | impact of carbon nanotube length on electron transport in aligned carbon nanotube networks |
| url | http://hdl.handle.net/1721.1/96369 https://orcid.org/0000-0003-3229-7315 https://orcid.org/0000-0003-3530-5819 https://orcid.org/0000-0002-1268-4492 https://orcid.org/0000-0003-4735-2153 |
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