Tunable and Robust Nanostructuring for Multifunctional Metal Additively Manufactured Interfaces

Jin Yao Ho, Kazi Fazle Rabbi, Siavash Khodakarami, Xiao Yan, Longnan Li, Teck Neng Wong, K. C. Leong, Nenad Miljkovic

Research output: Contribution to journalArticlepeer-review


Novel processing phenomena coupled with various alloying materials used in metal additive manufacturing (AM) have opened opportunities for the development of previously unexplored micro-/nanostructures. A rationally devised structure nanofabrication strategy of AM surfaces that can tailor the interface morphology and chemistry has the potential for many applications. Here, through an understanding of grain formation mechanisms during AM, we develop a facile method for tuning micro-/nanostructures of one of the most used AM alloys and rationally optimize the morphology for applications requiring low surface adhesion. We demonstrate that optimized AM structures reduce the adhesion of impaling water droplets and significantly delay icing time. The structure can also be altered and optimized for antiflooding jumping-droplet condensation that exhibits significant enhancement in heat transfer performance in comparison to nanostructures formed on conventional Al alloys. In addition to demonstrating the potential of functionalized AM surfaces, this work also provides guidelines for surface-structuring optimization applicable to other AM metals.

Original languageEnglish (US)
Pages (from-to)2650-2659
Number of pages10
JournalNano letters
Issue number7
StatePublished - Apr 13 2022


  • additive manufacturing
  • adhesion
  • condensation
  • icing
  • nanostructuring
  • surface engineering
  • wettability

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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