title: Fluorescence microscopy imaging of giant folding in a catanionic monolayer.
abstract: The behavior of the catanionic system of dioctadecyldimethylammonium bromide (DODAB) and sodium dodecyl sulfate (SDS) was investigated at 23 +/- 1 degrees C at the air-water interface using a Langmuir trough. The surface pressure as a function of surface area was measured while monitoring domain structures using epifluorescence microscopy. At high surface densities, the monolayer exhibits collapse through reversible folding at about 47 mN m(-1). This corresponds to the DODAB collapse surface pressure. The number of folds increases with the rate of compression speed and is history-dependent.
authors.affiliation: Department of Chemistry, Augustana College, Sioux Falls, South Dakota 57197, USA.
authors.forename: Joseph D
authors.initials: JD
authors.lastname: Coppock
authors.forename: Kapilanjan
authors.initials: K
authors.lastname: Krishan
authors.forename: Michael
authors.initials: M
authors.lastname: Dennin
authors.forename: Brian G
authors.initials: BG
authors.lastname: Moore
mesh_terms: D002412:Cations / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D008856:Microscopy, Fluorescence; D015394:Molecular Structure
chemical_list: D002412:Cations; D005456:Fluorescent Dyes