Flow-induced patterning of Langmuir monolayers

Michael J. Vogel, Reza Miraghaie, Juan Lopez, Amir H. Hirsa

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Insoluble monolayers on water have been patterned at the macroscopic scale (i.e., at the centimeter scale of the flow apparatus) as well as the mesoscopic scale (i.e., down to the micron scale resolvable via optical microscopy). The macroscopic patterning at the air/water interface results from a hydrodynamic instability leading to a steadily processing flow pattern. The velocity field is measured, and the associated shear stress at the interface is shown to be locally amplified by the flow pattern. The resulting hydrodynamic effects on two different monolayer systems are explored: (1) the pattern in a model monolayer consisting of micron-size, surface-bound particles is visualized to show that the particles are concentrated into isolated regions of converging flow with high shear, and (2) Brewster angle microscopy of a Langmuir monolayer (vitamin K 1) shows not only that the monolayer is patterned at the macroscopic scale but also that the localized high-shear flow further patterns the monolayer at the mesoscale.

Original languageEnglish (US)
Pages (from-to)5651-5654
Number of pages4
JournalLangmuir
Volume20
Issue number14
DOIs
StatePublished - Jul 6 2004

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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    Vogel, M. J., Miraghaie, R., Lopez, J., & Hirsa, A. H. (2004). Flow-induced patterning of Langmuir monolayers. Langmuir, 20(14), 5651-5654. https://doi.org/10.1021/la0492355