Total alignment of calcite at acidic polydiacetylene films: Cooperativity at the organic-inorganic interface

Journal Article · Fri Jul 28 04:00:00 EDT 1995 · Science

DOI:https://doi.org/10.1126/science.269.5223.515· OSTI ID:102981

Berman, A; June Ahn, D; Lio, A ^[1]

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1. Lawrence Berkeley Lab., CA (United States); and others

Biological matrices can direct the absolute alignment of inorganic crystals such as calcite. Cooperative effects at an organic-inorganic interface resulted in similar co-alignment of calcite at polymeric Langmuir-Schaefer films of 10,12-pentacosadiynoic acid (p-PDA). The films nucleated calcite at the (012) face, and the crystals were co-aligned with respect to the polymer`s conjugated backbone. At the same time, the p-PDA alkyl side chains reorganized to optimize the stereochemical fit to the calcite structure, as visualized by changes in the optical spectrum of the polymer. These results indicate the kinds of interactions that may occur in biological systems where large arrays of crystals are co-aligned. 41 refs., 5 figs.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 102981
• Journal Information: Science, Journal Name: Science Journal Issue: 5223 Vol. 269; ISSN SCIEAS; ISSN 0036-8075
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
ACIDIFICATION
ALIGNMENT
CALCITE
CRYSTAL GROWTH METHODS
INTERFACES
POLYACETYLENES