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Published February 2013 | Supplemental Material
Journal Article Open

Control of microstructural heterogeneities in carbon nanotube foams


Arrays of aligned carbon nanotubes (CNTs) under compression are known to exhibit a dissipative hysteretic response similar to classical foams. Here, we control the microstructure of the arrays during synthesis using a variable supply of carbon source and catalyst. We control CNT alignment and density along the array height, creating bands of high- and low-density regions. We study the dynamic response of these materials and show the ability to tailor the location and extent of strain localization under compression. We show that the synthesis procedures described herein allow for construction of CNT arrays with improved protection and energy dissipation in impact tests.

Additional Information

© 2012 Elsevier Ltd. Received 17 April 2012; Accepted 10 September 2012; Available online 18 September 2012. The authors thank Prof. Jinkyu Yang for his support with the impact tests and Lauren C. Montemayor for her assistance with the assembly of the synthesis apparatus. This work is supported by the Institute for Collaborative Biotechnologies, under contract W911NF-09-D-0001 with the Army Research Office. JRR also gratefully acknowledges support from the Department of Defense via a National Defense Science and Engineering Graduate (NDSEG) fellowship.

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