ABSTRACT
Dipalmitoylphosphatidylethanolamine (DDPE) Langmuir films at the air/water interface have been studied. These films exhibit high stability. The resulting films transferred on muscovite have been studied by scanning force microscopy with the contact mode. At the microscopic scale, DDPE Langmuir-Blodgett films appear densely packed with few defects. At molecular resolution the films appear well ordered; the double tail of the lipids has been observed.d Copyright 2000 Academic Press.
ABSTRACT
The UV-induced polymerization of an elaidic acid Langmuir film prepared on a terbium-containing subphase has been studied. The polymerization caused changes in pressure/area isotherms. The irradiated film in its more condensed state is in a liquid phase while the monomer film is in a solid phase. The dynamics of the irradiated films was investigated by following the evolution of the film area at a constant pressure. For the longer irradiation times, an expansion of the film area was observed. Scanning force microscopy and IR spectroscopy have been used to study the monolayer after its transfer onto a solid support. IR spectroscopic measurements indicated the presence of an oxygen-containing copolymer. Scanning force microscopy images revealed a modification of the structure of the film after irradiation. Copyright 1999 Academic Press.
