Strain-engineered manufacturing of freeform carbon nanotube microstructures
The skins of many plants and animals have intricate microscale surface features that give rise to properties such as directed water repellency and adhesion, camouflage, and resistance to fouling. However, engineered mimicry of these designs has been restrained by the limited capabilities of top–down...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Nature Publishing Group
2015
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| Online Access: | http://hdl.handle.net/1721.1/97461 https://orcid.org/0000-0002-7372-3512 |
| _version_ | 1811080715814567936 |
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| author | De Volder, M. Park, S. Hart, Anastasios John Tawfick, Sameh H. |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering De Volder, M. Park, S. Hart, Anastasios John Tawfick, Sameh H. |
| author_sort | De Volder, M. |
| collection | MIT |
| description | The skins of many plants and animals have intricate microscale surface features that give rise to properties such as directed water repellency and adhesion, camouflage, and resistance to fouling. However, engineered mimicry of these designs has been restrained by the limited capabilities of top–down fabrication processes. Here we demonstrate a new technique for scalable manufacturing of freeform microstructures via strain-engineered growth of aligned carbon nanotubes (CNTs). Offset patterning of the CNT growth catalyst is used to locally modulate the CNT growth rate. This causes the CNTs to collectively bend during growth, with exceptional uniformity over large areas. The final shape of the curved CNT microstructures can be designed via finite element modeling, and compound catalyst shapes produce microstructures with multidirectional curvature and unusual self-organized patterns. Conformal coating of the CNTs enables tuning of the mechanical properties independently from the microstructure geometry, representing a versatile principle for design and manufacturing of complex microstructured surfaces. |
| first_indexed | 2024-09-23T11:35:37Z |
| format | Article |
| id | mit-1721.1/97461 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:35:37Z |
| publishDate | 2015 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/974612022-10-01T04:38:25Z Strain-engineered manufacturing of freeform carbon nanotube microstructures De Volder, M. Park, S. Hart, Anastasios John Tawfick, Sameh H. Massachusetts Institute of Technology. Department of Mechanical Engineering Massachusetts Institute of Technology. Laboratory for Manufacturing and Productivity Park, S. Tawfick, S. Hart, Anastasios John The skins of many plants and animals have intricate microscale surface features that give rise to properties such as directed water repellency and adhesion, camouflage, and resistance to fouling. However, engineered mimicry of these designs has been restrained by the limited capabilities of top–down fabrication processes. Here we demonstrate a new technique for scalable manufacturing of freeform microstructures via strain-engineered growth of aligned carbon nanotubes (CNTs). Offset patterning of the CNT growth catalyst is used to locally modulate the CNT growth rate. This causes the CNTs to collectively bend during growth, with exceptional uniformity over large areas. The final shape of the curved CNT microstructures can be designed via finite element modeling, and compound catalyst shapes produce microstructures with multidirectional curvature and unusual self-organized patterns. Conformal coating of the CNTs enables tuning of the mechanical properties independently from the microstructure geometry, representing a versatile principle for design and manufacturing of complex microstructured surfaces. United States. Defense Advanced Research Projects Agency (HR0011-10-C-0192) United States. Air Force Office of Scientific Research (Young Investigator Program FA9550-11-1-0089) 2015-06-18T13:20:35Z 2015-06-18T13:20:35Z 2014-07 2014-03 Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/97461 De Volder, M., S. Park, S. Tawfick, and A. J. Hart. “Strain-Engineered Manufacturing of Freeform Carbon Nanotube Microstructures.” Nature Communications 5 (July 29, 2014). https://orcid.org/0000-0002-7372-3512 en_US http://dx.doi.org/10.1038/ncomms5512 Nature Communications Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Nature Publishing Group Other univ. web domain |
| spellingShingle | De Volder, M. Park, S. Hart, Anastasios John Tawfick, Sameh H. Strain-engineered manufacturing of freeform carbon nanotube microstructures |
| title | Strain-engineered manufacturing of freeform carbon nanotube microstructures |
| title_full | Strain-engineered manufacturing of freeform carbon nanotube microstructures |
| title_fullStr | Strain-engineered manufacturing of freeform carbon nanotube microstructures |
| title_full_unstemmed | Strain-engineered manufacturing of freeform carbon nanotube microstructures |
| title_short | Strain-engineered manufacturing of freeform carbon nanotube microstructures |
| title_sort | strain engineered manufacturing of freeform carbon nanotube microstructures |
| url | http://hdl.handle.net/1721.1/97461 https://orcid.org/0000-0002-7372-3512 |
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