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Visualization of nanocrystal breathing modes at extreme strains

Author

Listed:
  • Erzsi Szilagyi

    (Stanford University
    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory)

  • Joshua S. Wittenberg

    (Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory)

  • Timothy A. Miller

    (Stanford University)

  • Katie Lutker

    (University of California, Berkeley)

  • Florian Quirin

    (Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen)

  • Henrik Lemke

    (Linac Coherent Light Source, SLAC National Accelerator Laboratory)

  • Diling Zhu

    (Linac Coherent Light Source, SLAC National Accelerator Laboratory)

  • Matthieu Chollet

    (Linac Coherent Light Source, SLAC National Accelerator Laboratory)

  • Joseph Robinson

    (Linac Coherent Light Source, SLAC National Accelerator Laboratory)

  • Haidan Wen

    (Advanced Photon Source, Argonne National Laboratory)

  • Klaus Sokolowski-Tinten

    (Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen)

  • Aaron M. Lindenberg

    (Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory
    Stanford University
    Stanford PULSE Institute, SLAC National Accelerator Laboratory)

Abstract

Nanoscale dimensions in materials lead to unique electronic and structural properties with applications ranging from site-specific drug delivery to anodes for lithium-ion batteries. These functional properties often involve large-amplitude strains and structural modifications, and thus require an understanding of the dynamics of these processes. Here we use femtosecond X-ray scattering techniques to visualize, in real time and with atomic-scale resolution, light-induced anisotropic strains in nanocrystal spheres and rods. Strains at the percent level are observed in CdS and CdSe samples, associated with a rapid expansion followed by contraction along the nanosphere or nanorod radial direction driven by a transient carrier-induced stress. These morphological changes occur simultaneously with the first steps in the melting transition on hundreds of femtosecond timescales. This work represents the first direct real-time probe of the dynamics of these large-amplitude strains and shape changes in few-nanometre-scale particles.

Suggested Citation

  • Erzsi Szilagyi & Joshua S. Wittenberg & Timothy A. Miller & Katie Lutker & Florian Quirin & Henrik Lemke & Diling Zhu & Matthieu Chollet & Joseph Robinson & Haidan Wen & Klaus Sokolowski-Tinten & Aaro, 2015. "Visualization of nanocrystal breathing modes at extreme strains," Nature Communications, Nature, vol. 6(1), pages 1-6, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7577
    DOI: 10.1038/ncomms7577
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