Nanoporous surfaces via impact of molten metallic droplets

Meng Qu, Jose R. Colmenares, Alfredo Valarezo, Andrew Gouldstone

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Here we describe a new pathway for the production of nanoporous surfaces, by recourse to molten droplet impact and solidification. The nanopores in this case are frozen in bubbles that nucleate in the melt due to gas supersaturation within 100 nanoseconds of impact. Initial observations and previous analysis are presented, as well as ongoing work to control or pattern porosity via process variation and substrate pre-treatment. This method is presumably not limited in material, and has potential to create large area, functional surfaces.

Original languageEnglish
Pages (from-to)391-397
Number of pages7
JournalApplied Physics A: Materials Science and Processing
Issue number2
StatePublished - Aug 2009
Externally publishedYes


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