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Mimicking the Biomineralization of Aragonite (Calcium Carbonate) Using Reverse-Micelles Under Ambient Conditions

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Abstract:

Reverse micelles have been used, for the first time, to mimic the conditions suitable for the low-temperature (40 °C) synthesis of the high temperature and high pressure orthorhombic phase of calcium carbonate (aragonite) normally crystallizing in the sea as abalone shells and as natural pearls. The aragonite phase undergoes morphological changes under higher temperatures with long Y-junctions (at 40 °C) to shorter rod-like structures (at 85 °C). Pure calcite is obtained at higher reaction temperature. At a lower temperature (5 °C) homogeneous and monodisperse spheres of vaterite is obtained. The spherical particles after longer aging (168 h) aggregate to form nanorods and the self assembly is clearly seen at various stages by electron microscopic images.

Keywords: ARAGONITE; CALCITE; PHASE TRANSFORMATION; REVERSE MICELLES; VATERITE

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2007.711

Publication date: June 1, 2007

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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