Stable Ordering in Langmuir-Blodgett Films
- 17 August 2001
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 293 (5533), 1292-1295
- https://doi.org/10.1126/science.1060018
Abstract
Defects in the layering of Langmuir-Blodgett (LB) films can be eliminated by depositing from the appropriate monolayer phase at the air-water interface. LB films deposited from the hexagonal phase of cadmium arachidate (CdA 2 ) at pH 7 spontaneously transform into the bulk soap structure, a centrosymmetric bilayer with an orthorhombic herringbone packing. A large wavelength folding mechanism accelerates the conversion between the two structures, leading to a disruption of the desired layering. At pH > 8.5, though it is more difficult to draw LB films, almost perfect layering is obtained due to the inability to convert from the as-deposited structure to the equilibrium one.Keywords
This publication has 23 references indexed in Scilit:
- Investigations of the Structure and Hydrogen Bonding of Water Molecules at Liquid Surfaces by Vibrational Sum Frequency SpectroscopyThe Journal of Physical Chemistry B, 1998
- “Turnover” of Amphiphile Molecules in Langmuir Blodgett Films of Salts of Fatty Acids: An X-ray Diffraction StudyLangmuir, 1997
- Langmuir−Blodgett (L−B) Multilayer FilmsLangmuir, 1997
- Two-Dimensional Crystal Structure of Cadmium Arachidate Studied by Synchrotron X-ray Diffraction and ReflectivityLangmuir, 1994
- Influence of cations, alkane chain length, and substrate on molecular order of Langmuir-Blodgett filmsJournal of the American Chemical Society, 1993
- Quantitative lattice measurement of thin Langmuir-Blodgett films by atomic-force microscopyPhysical Review E, 1993
- Reorganization and crystallite formation in Langmuir-Blodgett filmsThe Journal of Physical Chemistry, 1992
- Domain boundaries and buckling superstructures in Langmuir–Blodgett filmsNature, 1992
- Divalent cation-stearic acid monolayer interactions at the air/water interfaceLangmuir, 1992
- Optical Second Harmonic Generation at InterfacesAnnual Review of Physical Chemistry, 1989