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Crystalline Corrugation in Multilayer Films on Aqueous Subphases
Author(s) -
Buller R.,
Weissbuch I.,
Cohen S.,
Kjaer K.,
Lahav M.,
Leiserowitz L.
Publication year - 2003
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200390221
Subject(s) - chemistry , aqueous solution , crystallography , mica , specular reflection , diffraction , synchrotron , ion , chemical physics , optics , composite material , materials science , organic chemistry , physics
A strong Bragg peak, attributed to regular corrugation in a crystalline film, was detected in a series of self‐assembled supramolecular complexes of bifunctional bolaamphiphiles of different lengths, with divalent ions of Pb and Cu, at the airaqueous interface. This peak has a d spacing half that of the proposed corrugation‐repeat length of ca. 82 Å, which is not a multiple of the long lattice spacing of the crystalline structure, and is susceptible to film compression. This corrugation is interpreted in terms of unfavorable interactions between the polar aqueous surface and the nonpolar hydrocarbon part of the bolaamphiphiles. To establish the nature of the corrugation, grazing‐incidence X‐ray diffraction and specular X‐ray reflectivity with synchrotron radiation were applied, as well as scanning force microscopy of films deposited on mica.