On the mechanism of calcium carbonate polymorph selection via confinement

2022 ◽  
Author(s):  
A Katsman ◽  
Iryna Polishchuk ◽  
Boaz Pokroy
Keyword(s):  
Calcium Carbonate ◽  
Polymorph Selection

Organisms deposit various biominerals in the course of their biomineralisation. The most abundant of these is calcium carbonate, which manifests itself in several polymorphs. While organisms possess the ability to...

Control of Polymorph Selection in Amorphous Calcium Carbonate Crystallization by Poly(Aspartic Acid): Two Different Mechanisms

Small ◽  
2017 ◽  
Vol 13 (21) ◽  
pp. 1603100 ◽  
Author(s):  
Zhaoyong Zou ◽  
Luca Bertinetti ◽  
Yael Politi ◽  
Peter Fratzl ◽  
Wouter J. E. M. Habraken
Keyword(s):  
Calcium Carbonate ◽  
Aspartic Acid ◽  
Amorphous Calcium Carbonate ◽  
Polymorph Selection

Transformation of amorphous calcium carbonate nanoparticles into aragonite controlled by ACCBP

CrystEngComm ◽  
2016 ◽  
Vol 18 (12) ◽  
pp. 2125-2134 ◽  
Author(s):  
Jingtan Su ◽  
Fangjie Zhu ◽  
Guiyou Zhang ◽  
Hongzhong Wang ◽  
Liping Xie ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Binding Protein ◽  
Pearl Oyster ◽  
Amorphous Calcium Carbonate ◽  
Polymorph Selection ◽  
The Matrix ◽  
Extrapallial Fluid

Polymorph switching of calcium carbonate controlled by amorphous calcium carbonate-binding protein, an extrapallial fluid (EPF) protein from the pearl oyster, is investigated. The polymorph selection in nacre or pearl growth may be controlled not only by the nucleating template on the matrix but also by the physicochemical effects of EPF proteins.

scholarly journals Composite Materials Design: Biomineralization Proteins and the Guided Assembly and Organization of Biomineral Nanoparticles

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 581 ◽  
Author(s):  
John Evans
Keyword(s):  
Calcium Carbonate ◽  
Potential Role ◽  
Materials Design ◽  
Ordered Structures ◽  
Biomineralization Process ◽  
Polymorph Selection ◽  
Associated Proteins ◽  
Guided Assembly ◽  
Particle Attachment

There has been much discussion of the role of proteins in the calcium carbonate biomineralization process, particularly with regard to nucleation, amorphous stabilization/transformation, and polymorph selection. However, there has been little if any discussion of the potential role that proteins might play in another important process: the guided assembly and organization of mineral nanoparticles into higher-ordered structures such as mesocrystals. This review discusses particle attachment theory and recent evidence of mineral-associated proteins forming hydrogels that assemble and organize mineral clusters into crystalline phase. From this discussion we postulate a mechanism by which biomineralization protein hydrogel aggregation assists in mineral nanoparticle assembly and organization within calcium carbonate skeletal elements and discuss potentials ways for harnessing this process in materials design.

scholarly journals The role of microbial sulfate reduction in calcium carbonate polymorph selection

2018 ◽  
Vol 237 ◽  
pp. 184-204 ◽  
Author(s):  
Chin Yik Lin ◽  
Alexandra V. Turchyn ◽  
Zvi Steiner ◽  
Pieter Bots ◽  
Giulio I. Lampronti ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Sulfate Reduction ◽  
Microbial Sulfate Reduction ◽  
Polymorph Selection

scholarly journals Influence of Substrate Mineralogy on Bacterial Mineralization of Calcium Carbonate: Implications for Stone Conservation

2012 ◽  
Vol 78 (11) ◽  
pp. 4017-4029 ◽  
Author(s):  
Carlos Rodriguez-Navarro ◽  
Fadwa Jroundi ◽  
Mara Schiro ◽  
Encarnación Ruiz-Agudo ◽  
María Teresa González-Muñoz
Keyword(s):  
Calcium Carbonate ◽  
Culture Conditions ◽  
Building Stone ◽  
Bacterial Attachment ◽  
Bacterial Cells ◽  
Calcium Carbonate Precipitation ◽  
Stone Conservation ◽  
Historical Building ◽  
Content Type ◽  
Polymorph Selection

ABSTRACTThe influence of mineral substrate composition and structure on bacterial calcium carbonate productivity and polymorph selection was studied. Bacterial calcium carbonate precipitation occurred on calcitic (Iceland spar single crystals, marble, and porous limestone) and silicate (glass coverslips, porous sintered glass, and quartz sandstone) substrates following culturing in liquid medium (M-3P) inoculated with different types of bacteria (Myxococcus xanthus,Brevundimonas diminuta, and a carbonatogenic bacterial community isolated from porous calcarenite stone in a historical building) and direct application of sterile M-3P medium to limestone and sandstone with their own bacterial communities. Field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), powder X-ray diffraction (XRD), and 2-dimensional XRD (2D-XRD) analyses revealed that abundant highly oriented calcite crystals formed homoepitaxially on the calcitic substrates, irrespective of the bacterial type. Conversely, scattered spheroidal vaterite entombing bacterial cells formed on the silicate substrates. These results show that carbonate phase selection is not strain specific and that under equal culture conditions, the substrate type is the overruling factor for calcium carbonate polymorph selection. Furthermore, carbonate productivity is strongly dependent on the mineralogy of the substrate. Calcitic substrates offer a higher affinity for bacterial attachment than silicate substrates, thereby fostering bacterial growth and metabolic activity, resulting in higher production of calcium carbonate cement. Bacterial calcite grows coherently over the calcitic substrate and is therefore more chemically and mechanically stable than metastable vaterite, which formed incoherently on the silicate substrates. The implications of these results for technological applications of bacterial carbonatogenesis, including building stone conservation, are discussed.

POLYMORPH SELECTION OF CALCIUM CARBONATE BY THE MORPHOLOGY OF BIOMACROMOLECULES: FROM ARAGONITE, VATERITE TO CALCITE

2009 ◽  
Vol 23 (31n32) ◽  
pp. 3695-3706 ◽  
Author(s):  
JUNWU XIAO ◽  
YINGCHUN ZHU ◽  
JIANHUI YUAN ◽  
QICHAO RUAN ◽  
YI ZENG ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
General Interest ◽  
Hexagonal Prism ◽  
Polymorph Selection ◽  
Chitosan Gel ◽  
Selection Of

The selective polymorph synthesis of aragonite, vaterite and calcite was done by changing the conformation of chitosan molecules. Aragonite crystals in hexagonal prism-like shape were obtained in chitosan precipitates, vaterite crystals in hexagonal symmetrical plate-like shape were prepared in chitosan gel, and calcite nanoparticles were obtained in chitosan sol. The phenomenon of polymorph selection of biominerals by the morphology of biomacromolecules indicates that the studies on the relation between biominerals and biomacromelecules have general interest not only in bionics, but also in biometrics and related fields.

A TEM study of the microstructure of avian eggshells

1992 ◽  
Vol 50 (2) ◽  
pp. 1102-1103
Author(s):  
S. Q. Xiao ◽  
S. Baden ◽  
A. H. Heuer
Keyword(s):  
Electron Microscope ◽  
Calcium Carbonate ◽  
Nucleation And Growth ◽  
Growth Mechanisms ◽  
Shell Surface ◽  
Thin Sections ◽  
Polycrystalline Metals ◽  
Transmission Electron ◽  
Nucleation And Growth Mechanisms

The avian eggshell is one of the most rapidly mineralizing biological systems known. In situ, 5g of calcium carbonate are crystallized in less than 20 hrs to fabricate the shell. Although there have been much work about the formation of eggshells, controversy about the nucleation and growth mechanisms of the calcite crystals, and their texture in the eggshell, still remain unclear. In this report the microstructure and microchemistry of avian eggshells have been analyzed using transmission electron microscope (TEM) and energy dispersive spectroscopy (EDS).Fresh white and dry brown eggshells were broken and fixed in Karnosky's fixative (kaltitanden) for 2 hrs, then rinsed in distilled H2O. Small speckles of the eggshells were embedded in Spurr medium and thin sections were made ultramicrotome.The crystalline part of eggshells are composed of many small plate-like calcite grains, whose plate normals are approximately parallel to the shell surface. The sizes of the grains are about 0.3×0.3×1 μm3 (Fig.l). These grains are not as closely packed as man-made polycrystalline metals and ceramics, and small gaps between adjacent grains are visible indicating the absence of conventional grain boundaries.

Sign in / Sign up

Export Citation Format

Share Document