Voinescu, Alina E. and Kellermeier, Matthias and Bartel, Bjoern and Carnerup, Anna M. and Larsson, Ann-Kristin and Touraud, Didier and Kunz, Werner and Kienle, Lorenz and Pfitzner, Arno and Hyde, Stephen T. (2008) Inorganic self-organized silica aragonite biomorphic composites. CRYSTAL GROWTH & DESIGN, 8 (5). pp. 1515-1521. ISSN 1528-7483, 1528-7505
Full text not available from this repository. (Request a copy)Abstract
The precipitation of calcium carbonate in alkaline silica solutions results in the formation of complex curvilinear forms if aragonite formation is encouraged by growth at an elevated temperature (80 degrees C). The resulting coralline self-assembled silica-calcium carbonate particles are "biomorphs", bearing a striking resemblance to natural coral forms. These materials, comprised of calcium carbonate nanocrystals and an amorphous silica matrix, have a complex ultrastructure, made of clusters of gathered sheets of variable curvatures formed by successive curling. The nanocrystals within these "ruled surfaces" are thin, elongated, densely packed needles of aragonite. These clusters are outgrowths from central saddlelike cores that resemble developable petaloid surfaces. The size, shape, crystallography, and chemical composition of the resulting biomorphs were examined by optical microscopy, field emission scanning electron microscopy (FE-SEM), powder X-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM and HRTEM), and energy dispersive X-ray analysis (EDX).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CALCIUM-CARBONATE PARTICLES; PRECIPITATION; MORPHOLOGIES; GEOMETRY; CACO3; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Werner Kunz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Nov 2020 08:06 |
| Last Modified: | 03 Nov 2020 08:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/30930 |
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