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Buckling-driven delamination of carbon nanotube forests

Abadi, Parisa Pour Shahid Saeed and Hutchens, Shelby B. and Greer, Julia R. and Cola, Baratunde A. and Graham, Samuel (2013) Buckling-driven delamination of carbon nanotube forests. Applied Physics Letters, 102 (22). Art. No. 223103. ISSN 0003-6951. doi:10.1063/1.4802080.

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We report buckling-driven delamination of carbon nanotube (CNT) forests from their growth substrates when subjected to compression. Macroscale compression experiments reveal local delamination at the CNT forest-substrate interface. Results of microscale flat punch indentations indicate that enhanced CNT interlocking at the top surface of the forest accomplished by application of a metal coating causes delamination of the forest from the growth substrate, a phenomenon not observed in indentation of as-grown CNT forests. We postulate that the post-buckling tensile stresses that develop at the base of the CNT forests serve as the driving force for delamination.

Item Type:Article
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Greer, Julia R.0000-0002-9675-1508
Additional Information:© 2013 AIP Publishing LLC. Received 13 February 2013; accepted 1 April 2013; published online 4 June 2013. This work was partially supported by DARPA and the Space and Naval Warfare (SPAWAR) Systems Center, Pacific under Contract No. N66001-09-C-2013. J.R.G. and S.B.H. gratefully acknowledge the financial support from the Institute for Collaborative Biotechnologies (ICB) through grant W911NF-09-0001 from the U.S. Army Research Office. The content of the information does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred.
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Office of Naval Research (ONR)N66001-09-C-2013
Army Research Office (ARO)W911NF-09-0001
Subject Keywords:buckling, carbon nanotubes, delamination, nanoindentation, tensile strength
Issue or Number:22
Classification Code:PACS: 81.40.Lm;; 62.25.-g
Record Number:CaltechAUTHORS:20130712-075812593
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39329
Deposited By: Tony Diaz
Deposited On:22 Jul 2013 18:53
Last Modified:09 Nov 2021 23:44

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