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Sponge-like nanoporous single crystals of gold

Author

Listed:
  • Maria Koifman Khristosov

    (Technion—Israel Institute of Technology
    Russell Berrie Nanotechnology Institute, Technion—Israel Institute of Technology)

  • Leonid Bloch

    (Technion—Israel Institute of Technology)

  • Manfred Burghammer

    (European Synchrotron Radiation Facility, BP 220
    X-ray Microspectroscopy and Imaging Research Group, Ghent University)

  • Yaron Kauffmann

    (Technion—Israel Institute of Technology)

  • Alex Katsman

    (Technion—Israel Institute of Technology)

  • Boaz Pokroy

    (Technion—Israel Institute of Technology
    Russell Berrie Nanotechnology Institute, Technion—Israel Institute of Technology)

Abstract

Single crystals in nature often demonstrate fascinating intricate porous morphologies rather than classical faceted surfaces. We attempt to grow such crystals, drawing inspiration from biogenic porous single crystals. Here we show that nanoporous single crystals of gold can be grown with no need for any elaborate fabrication steps. These crystals are found to grow following solidification of a eutectic composition melt that forms as a result of the dewetting of nanometric thin films. We also present a kinetic model that shows how this nano-porous single-crystalline structure can be obtained, and which allows the potential size of the porous single crystal to be predicted. Retaining their single-crystalline nature is due to the fact that the full crystallization process is faster than the average period between two subsequent nucleation events. Our findings clearly demonstrate that it is possible to form single-crystalline nano porous metal crystals in a controlled manner.

Suggested Citation

  • Maria Koifman Khristosov & Leonid Bloch & Manfred Burghammer & Yaron Kauffmann & Alex Katsman & Boaz Pokroy, 2015. "Sponge-like nanoporous single crystals of gold," Nature Communications, Nature, vol. 6(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9841
    DOI: 10.1038/ncomms9841
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