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Topological control of liquid-metal-dealloyed structures

Author

Listed:
  • Longhai Lai

    (Northeastern University)

  • Bernard Gaskey

    (Johns Hopkins University)

  • Alyssa Chuang

    (Johns Hopkins University)

  • Jonah Erlebacher

    (Johns Hopkins University)

  • Alain Karma

    (Northeastern University)

Abstract

The past few years have witnessed the rapid development of liquid metal dealloying to fabricate nano-/meso-scale porous and composite structures with ultra-high interfacial area for diverse materials applications. However, this method currently has two important limitations. First, it produces bicontinuous structures with high-genus topologies for a limited range of alloy compositions. Second, structures have a large ligament size due to substantial coarsening during dealloying at high temperature. Here we demonstrate computationally and experimentally that those limitations can be overcome by adding to the metallic melt an element that promotes high-genus topologies by limiting the leakage of the immiscible element during dealloying. We further interpret this finding by showing that bulk diffusive transport of the immiscible element in the liquid melt strongly influences the evolution of the solid fraction and topology of the structure during dealloying. The results shed light on fundamental differences in liquid metal and electrochemical dealloying and establish a new approach to produce liquid-metal-dealloyed structures with desired size and topologies.

Suggested Citation

  • Longhai Lai & Bernard Gaskey & Alyssa Chuang & Jonah Erlebacher & Alain Karma, 2022. "Topological control of liquid-metal-dealloyed structures," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30483-5
    DOI: 10.1038/s41467-022-30483-5
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    References listed on IDEAS

    as
    1. Pierre-Antoine Geslin & Ian McCue & Bernard Gaskey & Jonah Erlebacher & Alain Karma, 2015. "Topology-generating interfacial pattern formation during liquid metal dealloying," Nature Communications, Nature, vol. 6(1), pages 1-8, December.
    2. Zhen Lu & Cheng Li & Jiuhui Han & Fan Zhang & Pan Liu & Hao Wang & Zhili Wang & Chun Cheng & Linghan Chen & Akihiko Hirata & Takeshi Fujita & Jonah Erlebacher & Mingwei Chen, 2018. "Three-dimensional bicontinuous nanoporous materials by vapor phase dealloying," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    3. Jonah Erlebacher & Michael J. Aziz & Alain Karma & Nikolay Dimitrov & Karl Sieradzki, 2001. "Evolution of nanoporosity in dealloying," Nature, Nature, vol. 410(6827), pages 450-453, March.
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