In situ Mechanical Testing Reveals Periodic Buckle Nucleation and Propagation in Carbon Nanotube Bundles
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.
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.Attached Files
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Additional details
- Eprint ID
- 19459
- DOI
- 10.1002/adfm.201000305
- Resolver ID
- CaltechAUTHORS:20100817-080847275
- Army Research Office (ARO)
- UCSB.ICB4b
- Kavli Nanoscience Institute
- Created
-
2010-08-17Created from EPrint's datestamp field
- Updated
-
2021-11-08Created from EPrint's last_modified field
- Caltech groups
- Kavli Nanoscience Institute