Journal ArticleDOI
Organic−Inorganic Hybrid Structure of Calcite Crystalline Assemblies Grown in a Gelatin Hydrogel Matrix: Relevance to Biomineralization
TLDR
The authors showed that the addition of poly-aspartate to the pore solution in either gelatin or poly-acrylamide hydrogel appears to overcompensate the physical properties of the organic matrix.Abstract:
Calcite particles are grown in a collagenous matrix using a counter-diffusion arrangement. Although microstructural analysis revealed a heterogeneous intergrowth of organic and inorganic phases within the particles, the composite growth is rather a consequence of local chemical environment that is not specific to the gelatin gel. However, using an artificial poly-acrylamide hydrogel results in a very different growth morphology. The addition of poly-aspartate to the pore solution in either gelatin or poly-acrylamide hydrogel appears to overcompensate the physical properties of the organic matrix, leading to morphologies independent of which hydrogel is used. Our results stress the importance of noncollageneous proteins within a physical growth environment.read more
Citations
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Mesocrystals: Inorganic superstructures made by highly parallel crystallization and controlled alignment
Helmut Cölfen,Markus Antonietti +1 more
TL;DR: Mesocrystals are exiting examples of nonclassical crystallization, which does not proceed through ion-by-ion attachment, but by a modular nanobuilding-block route, which makes crystallization more independent of ion products or molecular solubility, it occurs without pH or osmotic pressure changes, and opens new strategies for crystal morphogenesis.
Journal ArticleDOI
Controlling Mineral Morphologies and Structures in Biological and Synthetic Systems
Fiona C. Meldrum,Helmut Cölfen +1 more
TL;DR: A comparison of Silicification in Diatoms and Bioinspired Routes to Controlling Crystal Morphologies shows the importance of knowing the carrier and removal status of the substance before and during silicification.
Journal ArticleDOI
Oriented attachment and mesocrystals: Non-classical crystallization mechanisms based on nanoparticle assembly
TL;DR: A non-exhaustive literature survey on particle based crystallization pathways leading to single crystals via mesoscopic transformation with a focus on recent examples and studies, which are dedicated to a mechanistic understanding.
Journal ArticleDOI
Precipitation of carbonates: recent progress in controlled production of complex shapes
TL;DR: The recent progress in carbonate precipitation with complex shapes mainly concerns CaCO3 due to its importance for industry and biomineralization as mentioned in this paper, and some remarkable progress is reported in the areas of template and additive controlled Ca CO3 crystallization as well as its morphogenesis based on mesoscopic transformation which lead to a deeper understanding of the underlying structuration principles.
Journal ArticleDOI
Bacterially mediated mineralization of vaterite
Carlos Rodriguez-Navarro,Concepcion Jimenez-Lopez,Alejandro B. Rodríguez-Navarro,Maria Teresa Gonzalez-Muñoz,Manuel Rodriguez-Gallego +4 more
TL;DR: In this paper, high resolution transmission electron microscopy (HRTEM) observations point to polymorph selection by physicochemical (kinetic) factors (high supersaturation) and stabilization by organics, both connected with bacterial activity.
References
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Journal ArticleDOI
Control of crystal phase switching and orientation by soluble mollusc-shell proteins
TL;DR: In this paper, the authors showed that soluble polyanionic proteins alone are sufficient to control the crystal phase of calcite and calcite without the need for deposition of an intervening protein sheet.
Journal ArticleDOI
Macromolecules in mollusc shells and their functions in biomineralization
Steve Weiner,Wolfie Traub +1 more
TL;DR: In this paper, the authors examined the possibility that the organic matrix functions as a template for crystal formation by epitaxial growth, and found that the matrix surfaces contain acidic proteins and polysaccharides.
Journal ArticleDOI
The role of magnesium in the crystallization of calcite and aragonite in a porous medium
TL;DR: In this paper, the authors studied the growth of calcite and aragonite under controlled supersaturation conditions by the counter diffusion of Ca2+ and CO32- ions through a column of silica gel.
Journal ArticleDOI
Ionotropic Nucleation of Calcium Carbonate by Molluscan Matrix
TL;DR: The hydrophilic, sulfated fraction of the organic matrix found in molluscan shells appears to be involved in crystal nucleation, and is located primarily at the sites of initial nucleation.
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