Periodic Interfacial Precipitation in Polymer Films

Periodic Interfacial Precipitation in Polymer Films

Interfacial precipitation of silver halides in water-swollen polymer films occurred in complex, multilayered patterns if the concentrations of counterdiffusing reactants were unequal or decreased at different rates. Development of the rapidly forming Liesegang rings, which extend the phenomenon of p...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1984-09, Vol.225 (4666), p.1021-1027
1. Verfasser: Mueller, Karl F.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Chemical precipitation
Chemical research
Colloids
Exact sciences and technology
Ion concentration
Material films
Organic polymers
Physicochemistry of polymers
Plastic films
Polymers
Precipitates
Precipitation
Properties and characterization
Reactants
Silver
Silver halides
Solubility
Solution and gel properties
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Beschreibung
Zusammenfassung:Interfacial precipitation of silver halides in water-swollen polymer films occurred in complex, multilayered patterns if the concentrations of counterdiffusing reactants were unequal or decreased at different rates. Development of the rapidly forming Liesegang rings, which extend the phenomenon of periodic precipitation to the submicrometer range, is attributable to the combined effect of a moving reaction zone and periodic immobilization of colloidal silver halide.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.225.4666.1021