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Fabrication and deformation of three-dimensional hollow ceramic nanostructures

Jang, Dongchan and Meza, Lucas R. and Greer, Frank and Greer, Julia R. (2013) Fabrication and deformation of three-dimensional hollow ceramic nanostructures. Nature Materials, 12 (10). pp. 893-898. ISSN 1476-1122.

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Creating lightweight, mechanically robust materials has long been an engineering pursuit. Many siliceous skeleton species— such as diatoms, sea sponges and radiolarians—have remarkably high strengths when compared with man-made materials of the same composition, yet are able to remain lightweight and porous1–7. It has been suggested that these properties arise from the hierarchical arrangement of different structural elements at their relevant length scales8,9. Here, we report the fabrication of hollow ceramic scaffolds that mimic the length scales and hierarchy of biological materials. The constituent solids attain tensile strengths of 1.75 GPa without failure even after multiple deformation cycles, as revealed by in situ nanomechanical experiments and finite-element analysis. We discuss the high strength and lack of failure in terms of stress concentrators at surface imperfections and of local stresses within the microstructural landscape. Our findings suggest that the hierarchical design principles offered by hard biological organisms can be applied to create damage-tolerant lightweight engineering materials.

Item Type:Article
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URLURL TypeDescription ReadCube access
Jang, Dongchan0000-0002-2814-9734
Meza, Lucas R.0000-0003-0250-2621
Greer, Julia R.0000-0002-9675-1508
Additional Information:© 2013 Macmillan Publishers Limited. Received 15 April 2013; accepted 17 July 2013; published online 1 September 2013. The authors gratefully acknowledge the financial support from the Dow-Resnick Innovation Fund at Caltech, DARPA's Materials with Controlled Microstructureand Architecture program, and the Army Research Office through the Institute for Collaborative Biotechnologies (ICB) at Caltech (ARO Award number UCSB.ICB4b). Part of this work was carried out at the Jet Propulsion Laboratory under a contract with NASA. The authors acknowledge critical support and infrastructure provided by the Kavli Nanoscience Institute at Caltech.
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Caltech Dow-Resnick Innovation FundUNSPECIFIED
Army Research Office (ARO)UCSB.ICB4b
Kavli Nanoscience InstituteUNSPECIFIED
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Issue or Number:10
Record Number:CaltechAUTHORS:20130930-130210956
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41559
Deposited By: Joy Painter
Deposited On:30 Sep 2013 20:24
Last Modified:14 Apr 2020 17:20

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