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Control over the crystal phase, shape, size and aggregation of calcium carbonate via a l-aspartic acid inducing process

Paper ID Volume ID Publish Year Pages File Format Full-Text
13073 828 2004 7 PDF Available
Title
Control over the crystal phase, shape, size and aggregation of calcium carbonate via a l-aspartic acid inducing process
Abstract

The acidic amino acid, such as aspartic acid (l-Asp), and glutamic acid are the primary active molecules of the glycoprotein on the organic/inorganic interface of biomineralized tissue. In this study, aspartic acid was used as the organic template in inducing the nucleation and growth of calcium carbonate. With the analysis of X-ray diffraction we investigated the relationship between the l-Asp concentration and the precipitation phase crystal structure of calcium carbonate. SEM and TEM were employed in the analysis of the morphological characteristic of the precipitation and the aggregation of the nanoscale porous phase. In order to get the direct evidence of the interaction between Ca2+ and l-Asp, the technique of QCM was used in the investigation of the coordinate interaction of Ca2+/l-Asp. As the results have shown, l-Asp alone is adequate to switch the transformation between calcite and vaterite, and neither soluble organic additions nor metal ions are needed. Meanwhile, the morphology, size and aggregative way of the deposition are also mediated with change of l-Asp concentration. To interpret the cause of the hierarchic structure range from nanoscale to micron-scale and the formation of the porous spheres of vaterite, an assumption of limited-fusion was proposed from the view of the small biomolecules polarity that can control over the growth of the crystals and the aggregation of the micro crystals. The conclusion also provide a new material synthesize strategy.

Keywords
l-Asp; Organic template; Calcium carbonate; Polymorphs
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Control over the crystal phase, shape, size and aggregation of calcium carbonate via a l-aspartic acid inducing process
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 25, Issue 17, August 2004, Pages 3923–3929
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us