Journal article
Crystallinity of the double layer of cadmium arachidate films at the water surface
A crystalline counterionic layer at the interface between an electrolyte solution and a charged layer of insoluble amphiphilic molecules was observed with grazing incidence synchrotron x-ray diffraction. Uncompressed arachidic films spread over 10(-3) molar cadmium chloride solution (pH 8.8) spontaneously form crystalline clusters with coherence lengths of approximately 1000 angstroms at 9-degrees-C.
Ten distinct diffraction peaks were observed, seven of which were attributed to scattering only from a crystalline Cd2+ layer and the other three to scattering primarily from the arachidate layer. The reflections from the Cd2+ layer were indexed according to a 2 X 3 supercell of the arachidate lattice with three Cd2+ ions per cadmium unit cell.
Language: | English |
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Publisher: | American Society for the Advancement of Science |
Year: | 1991 |
Pages: | 1532-1536 |
ISSN: | 10959203 and 00368075 |
Types: | Journal article |
DOI: | 10.1126/science.252.5012.1532 |