Imaging microflows and nanopore structures using hydrodynamic force microscopy

Elaine S. Ulrich, Christopher M. Limbach, Srinivas Manne

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

We report the three-dimensional profilometry of gas microflows and the two-dimensional mapping of fluid permeability through nanoporous substrates using hydrodynamic force microscopy (HFM). Using fluid drag from external flows as a contrast mechanism, HFM has mapped Poiseuille flow through ∼100 nm pores and has identified subsurface fouling unresolvable by conventional force microscopy. HFM demonstrates nanoscale spatial resolution and flow velocity resolution on the order of 1 cms, making it an attractive investigative tool for applications in separation science, microfluidics, and nanoporous materials.

Original languageEnglish (US)
Article number243103
JournalApplied Physics Letters
Volume93
Issue number24
DOIs
StatePublished - Dec 29 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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