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In situ Mechanical Testing Reveals Periodic Buckle Nucleation and Propagation in Carbon Nanotube Bundles

Hutchens, Shelby B. and Hall, Lee J. and Greer, Julia R. (2010) In situ Mechanical Testing Reveals Periodic Buckle Nucleation and Propagation in Carbon Nanotube Bundles. Advanced Functional Materials, 20 (14). pp. 2338-2346. ISSN 1616-301X. http://resolver.caltech.edu/CaltechAUTHORS:20100817-080847275

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Abstract

Uniaxial compression studies are performed on 50-µm-diameter bundles of nominally vertical, intertwined carbon nanotubes grown via chemical vapor deposition from a photolithographically defined catalyst. The inhomogeneous microstructure is examined, demonstrating density and tube orientation gradients, believed to play a role in the unique periodic buckling deformation mechanism. Through in situ uniaxial compression experiments it is discovered that the characteristic bottom-to-top sequential buckling proceeds by first nucleating on the bundle surface and subsequently propagating laterally through the bundle, gradually collapsing the entire structure. The effects of strain rate are explored, and storage and loss stiffnesses are analyzed in the context of energy dissipation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/adfm.201000305 DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/adfm.201000305/abstractPublisherArticle
ORCID:
AuthorORCID
Greer, Julia R.0000-0002-9675-1508
Additional Information:© 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Article first published online: 11 May 2010. The authors gratefully acknowledge the financial support of the Army Research Office through the Institute for Collaborative Biotechnologies (ICB) at Caltech (ARO Award # UCSB.ICB4b). We also gratefully acknowledge the critical support and infrastructure provided by the Kavli Nanoscience Institute at Caltech as well as the method development assistance of the engineers in the Nanotechnology Measurement Operation of Agilent Corp., especially Brian Crawford and Jenny Hay. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with National Aeronautics and Space Administration (NASA). We thank Dr. Harish Manohara for discussions and advice regarding CNT bundle growth. CNT pillars were synthesized using CVD growth facilities within the MicroDevices Laboratory at the Jet Propulsion Laboratory.
Group:Kavli Nanoscience Institute
Funders:
Funding AgencyGrant Number
Army Research Office (ARO)UCSB.ICB4b
Kavli Nanoscience InstituteUNSPECIFIED
Record Number:CaltechAUTHORS:20100817-080847275
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20100817-080847275
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19459
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:17 Aug 2010 17:03
Last Modified:11 Sep 2015 01:34

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