Coherent Atomic-Scale Ripples on Metallic Glasses Patterned by Low-Energy Ion Irradiation for Large-Area Surface Structuring

Peng Luo, Camilo Jaramillo, Alison Marie Wallum, Zetai Liu, Rui Zhao, Laiquan Shen, Yanqin Zhai, Jessica Crystal Spear, Davide Curreli, Joseph W. Lyding, Martin Gruebele, Weihua Wang, Jean Paul Allain, Y. Zhyang

Research output: Contribution to journalArticlepeer-review

Abstract

Periodic surface structures at the nanometer or micrometer scale have been achieved by various methods, while atomic-scale surface structures over large areas are unavailable. Herein, we report the formation of highly coherent atomic-scale ripple patterns on bulk metallic glass (MG) surfaces by low-energy ion irradiation. The pattern arises through three consecutive stages: emergence of initial random dots, subsequent transition to ripples, and ordering of the ripple pattern through annihilation reactions of mobile defects, while the wavelength and amplitude remain invariant throughout the patterning. No pattern is generated for the crystalline counterpart at the same irradiation condition. These observations suggest a distinct ripple forming process typical of MGs associated with their enhanced surface mobility, which enables a controllable self-organization approach for large-area surface structuring with atomic-scale precision.

Original languageEnglish (US)
Pages (from-to)12025-12033
Number of pages9
JournalACS Applied Nano Materials
Volume3
Issue number12
DOIs
StatePublished - Dec 24 2020

Keywords

  • iron irradiation
  • metallic glass
  • ripple formation
  • self-organization
  • surface patterning

ASJC Scopus subject areas

  • Materials Science(all)

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