MilliporeSigma

Imaging of collapsed fatty acid films at air-water interfaces.

Langmuir : the ACS journal of surfaces and colloids (2009-07-25)
Sangjun Seok, Tae Jung Kim, Soon Yong Hwang, Young Dong Kim, David Vaknin, Doseok Kim
ABSTRACT

In situ imaging ellipsometry is employed to monitor the morphology of collapsed films of fatty acid Langmuir monolayers on pure water and on CaCl2 solution. The ellipsometry images reveal the existence of multilayer domains in the collapsed region, and analysis of the images yields the thicknesses of these domains. The multilayer films formed on water are mainly trilayers, while those on CaCl2 solution are mainly bilayers. The structure of the collapsed films also changes sensitively depending on the history of compression of the molecular layer.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Arachidic acid, ≥99%
Sigma-Aldrich
Arachidic acid, synthetic, ≥99.0% (GC)