Three-Dimensional Coherent X-Ray Diffraction Imaging of a Ceramic Nanofoam: Determination of Structural Deformation Mechanisms

A. Barty, S. Marchesini, H. N. Chapman, C. Cui, M. R. Howells, D. A. Shapiro, A. M. Minor, J. C. H. Spence, U. Weierstall, J. Ilavsky, A. Noy, S. P. Hau-Riege, A. B. Artyukhin, T. Baumann, T. Willey, J. Stolken, T. van Buuren, and J. H. Kinney
Phys. Rev. Lett. 101, 055501 – Published 28 July 2008
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Abstract

Ultralow density polymers, metals, and ceramic nanofoams are valued for their high strength-to-weight ratio, high surface area, and insulating properties ascribed to their structural geometry. We obtain the labrynthine internal structure of a tantalum oxide nanofoam by x-ray diffractive imaging. Finite-element analysis from the structure reveals mechanical properties consistent with bulk samples and with a diffusion-limited cluster aggregation model, while excess mass on the nodes discounts the dangling fragments hypothesis of percolation theory.

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  • Received 31 August 2007

DOI:https://doi.org/10.1103/PhysRevLett.101.055501

©2008 American Physical Society

Authors & Affiliations

A. Barty1, S. Marchesini1,2,3,*, H. N. Chapman1,3, C. Cui2, M. R. Howells2, D. A. Shapiro2, A. M. Minor2, J. C. H. Spence4, U. Weierstall4, J. Ilavsky5, A. Noy1, S. P. Hau-Riege1, A. B. Artyukhin1, T. Baumann1, T. Willey1, J. Stolken1, T. van Buuren1, and J. H. Kinney6

  • 1Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA
  • 2Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA
  • 3Center for Biophotonics Science and Technology, University of California, Davis, 2700 Stockton Boulevard, Suite 1400, Sacramento, California 95817, USA
  • 4Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85287-1504, USA
  • 5Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 6Department of Preventive and Restorative Dental Sciences, University of California, San Francisco, California 94143, USA

  • *Corresponding author. smarchesini@lbl.gov

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Issue

Vol. 101, Iss. 5 — 1 August 2008

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