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Geometry-Induced Mechanical Properties of Carbon Nanotube Foams

Lattanzi, Ludovica and De Nardo, Luigi and Raney, Jordan R. and Daraio, Chiara (2014) Geometry-Induced Mechanical Properties of Carbon Nanotube Foams. Advanced Engineering Materials, 16 (8). pp. 1026-1031. ISSN 1438-1656.

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Carbon nanotube (CNT) foams have unmatched energy absorption properties derived from their complex hierarchical structure. The control of the micro-scale geometry of these foams allows tuning their behavior to specific application-driven needs. Geometrical structures in CNT foams are obtained by synthesizing CNTs on substrates patterned with different growth templates: circles, lines and concentric rings. To study the effects of the microstructural geometry on the bulk mechanical response of the foams, the samples are tested under cyclic quasi-static compressive deformation (up to 50% strain). The geometry of the patterns plays a fundamental role on the samples' macroscopic energy absorption capability, maximum stress, and strain recovery. Patterned CNT structures demonstrated mechanical properties comparable or improved over non-patterned, bulk CNT foams, but with much lower density. Quasi-static compressive tests performed on different patterned structures with the same effective density (ρ = 0.02 g cm^(−3)) exhibit considerably different responses. For example, the stress reached by foams patterned in concentric rings is ≈15 times higher than that observed for pillars and lines. The results show how the mechanical response of CNT foams can be tailored by varying the CNT microstructural architecture.

Item Type:Article
Related URLs:
URLURL TypeDescription
De Nardo, Luigi0000-0002-7492-6012
Daraio, Chiara0000-0001-5296-4440
Additional Information:© 2014 WILEY-VCH Verlag GmbH & Co. Received: November 11, 2013. Final Version: December 12, 2013. Published online: February 6, 2014. This work is supported by the Institute for Collaborative Biotechnologies, under contract W911NF-09-D-0001 with the Army Research Office. We thank the Kavli Nanoscience Institute at Caltech for the use of nanofabrication facilities.
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-09-D-0001
Issue or Number:8
Record Number:CaltechAUTHORS:20141027-072323994
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Official Citation:Lattanzi, L., De Nardo, L., Raney, J. R. and Daraio, C. (2014), Geometry-Induced Mechanical Properties of Carbon Nanotube Foams. Adv. Eng. Mater., 16: 1026–1031. doi: 10.1002/adem.201300524
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50822
Deposited By: Ruth Sustaita
Deposited On:27 Oct 2014 15:44
Last Modified:03 Oct 2019 07:27

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