title: Electron diffraction and imaging of uncompressed monolayers of amphiphilic molecules on vitreous and hexagonal ice.
abstract: A new approach is described for probing domains of ordered self-assemblies of amphiphilic monolayers at the aqueous solution interface. The method has potential importance for the study of membrane structure, Langmuir-Blodgett films, and nucleation processes of two-and three-dimensional crystals. Electron diffraction (ED) patterns indicative of two-dimensional crystalline self-assembly were obtained from samples, which were examined by cryo-electron microscopy, of monolayers of water-insoluble amphiphiles on vitrified aqueour substrates. The apparent hexagonal symmetry of an ED pattern from a C(16)H(33)OH monolayer was interpreted in terms of multiple twinning. Monolayers of the CL(31)H(63)OH and cadmium salt of C(19)H(39)CO(2)H that were studied by dark-field techniques displayed faceted two-dimensional crystallites with a maximal size of 1 to 2 micrometers. Epitaxial nucleation of hexagonal ice by the C(31)H(63)OH monolayer has also been demonstrated by ED.
authors.forename: J
authors.initials: J
authors.lastname: Majewski
authors.forename: L
authors.initials: L
authors.lastname: Margulis
authors.forename: D
authors.initials: D
authors.lastname: Jacquemain
authors.forename: F
authors.initials: F
authors.lastname: Leveiller
authors.forename: C
authors.initials: C
authors.lastname: Bohm
authors.forename: T
authors.initials: T
authors.lastname: Arad
authors.forename: Y
authors.initials: Y
authors.lastname: Talmon
authors.forename: M
authors.initials: M
authors.lastname: Lahav
authors.forename: L
authors.initials: L
authors.lastname: Leiserowitz