The Organic-Mineral Interface in Biominerals

Gilbert, Benjamin; Abrecht, Mike; Frazer, B. H.

doi:10.2138/rmg.2005.59.7

Cited by 148 publications

(97 citation statements)

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“…Extensive studies of formation and occurrence of biogenic iron-rich minerals are related to bacteria intracellular and extracellular biomineralization [15]. It is proven [18] that exopolysaccharides from various gram positive and gram negative bacteria are able to capture Fe 3+ ions from solution and induce precipitation of hematite (Fe 2 O 3 ) or ferrihydrite outside of the cell. Cabral et al [19] reported that extracellular microbal polysaccharides mediate formation of the xenotime-hematite aggregates.…”

Section: Research Article Open Accessmentioning

confidence: 99%

Renewable chitin from marine sponge as a thermostable biological template for hydrothermal synthesis of hematite nanospheres using principles of extreme biomimetics

Wysokowski

Petrenko

Motylenko

et al. 2015

Bioinspired Materials

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range of uses. Here, chitin-based scaffolds isolated from the skeleton of marine demosponge Aplysina aerophoba were used as a template for the in vitro formation of iron oxide from a saturated iron(III) chloride solution, under hydrothermal conditions (pH~1.5, 90 °C). The resultant chitin-Fe 2 O 3 three dimensional composites, prepared for the first time via hydrothermal synthesis route, were thoroughly characterized using light, fluorescence and scanning electron microscopy; as well as with analytical methods like Raman spectroscopy, electron diffraction and HR-TEM. The results show that this versatile method allows for efficient chitin mineralization with respect to hematite. Additionally, we demonstrate that chitin nanofibers template the nucleation of uniform Fe 2 O 3 nanocrystals.

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Section: Research Article Open Accessmentioning

confidence: 99%

Renewable chitin from marine sponge as a thermostable biological template for hydrothermal synthesis of hematite nanospheres using principles of extreme biomimetics

Wysokowski

Petrenko

Motylenko

et al. 2015

Bioinspired Materials

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“…The formation of many carbonate biominerals begins around organic templating structures (5), where atomic-scale interactions between organic surfaces and mineral growth processes define the gross architecture of the biomineral (4). At a mechanistic level, these organic-mineral interactions facilitate heterogeneous nucleation processes, and allow an organism to overcome chemical and physical barriers to crystal nucleation and growth (4,5). Organic-mineral interactions may also influence the composition of biominerals (6,7).…”

mentioning

confidence: 99%

Nanometer-Scale Chemistry of a Calcite Biomineralization Template: Implications for Skeletal Composition and Nucleation

Branson

Bonnin

Perea

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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Plankton, corals, and other organisms produce calcium carbonate skeletons that are integral to their survival, form a key component of the global carbon cycle, and record an archive of past oceanographic conditions in their geochemistry. A key aspect of the formation of these biominerals is the interaction between organic templating structures and mineral precipitation processes. Laboratory-based studies have shown that these atomic-scale processes can profoundly influence the architecture and composition of minerals, but their importance in calcifying organisms is poorly understood because it is difficult to measure the chemistry of in vivo biomineral interfaces at spatially relevant scales. Understanding the role of templates in biomineral nucleation, and their importance in skeletal geochemistry requires an integrated, multiscale approach, which can place atom-scale observations of organic-mineral interfaces within a broader structural and geochemical context. Here we map the chemistry of an embedded organic template structure within a carbonate skeleton of the foraminifera Orbulina universa using both atom probe tomography (APT), a 3D chemical imaging technique with Ångström-level spatial resolution, and time-of-flight secondary ionization mass spectrometry (ToF-SIMS), a 2D chemical imaging technique with submicron resolution. We quantitatively link these observations, revealing that the organic template in O. universa is uniquely enriched in both Na and Mg, and contributes to intraskeletal chemical heterogeneity. Our APT analyses reveal the cation composition of the organic surface, offering evidence to suggest that cations other than Ca 2+ , previously considered passive spectator ions in biomineral templating, may be important in defining the energetics of carbonate nucleation on organic templates. biomineralization | templating | foraminifera | geochemistry | paleoceanography

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“…Ex amples of biomineral composites include bone, dentine, enamel, mollusk shells, crustacean exoskeletons, eggshells, sponge silica skeletons, and a variety of transition metal minerals produced by different bacteria (see references in references [42] and [33]). The functions of the biomin eral composites include structural support, mechanical protection and movement, anchoring (to another body or to ocean floor) grinding, filtering, gravity or magnetic field sensing, optical and piezoelectric [33].…”

Section: Biomineral Compositesmentioning

confidence: 99%

“…Biomineral composites are composed of an organic matrix of pro teins, lipids and polysaccharides. The structure consist of a nano-or micro-scale amorphous or crystalline minerals formed by a biologically induced or controlled mineraliza tion processes, through complex chemical interactions be tween organic and inorganic matrices [2,42,91,116]. The structure is usually complex with the organic and the mineral components tightly interwoven at the nanoscale level, highly ordered and hierarchical to give high strength, rigidity along with mechanical and chemical stability, that are superior to synthetic materials made from the same materials.…”

Section: Biomineral Compositesmentioning

confidence: 99%

“…Biomineral composites are natural materials, a group of bioceramic-biopolymer com posites, produced through cell-mediated processes [40]. They are composed of inorganic nano-or micro-scale amorphous or crystalline minerals formed through bio logically induced or biologically controlled mineralization processes by living organisms in organic matrices of pro teins and polysaccharides [42,116]. Their functions in clude structural support, mechanical protection, move ment, grinding, and gravity or magnetic field sensing.…”

Section: Introductionmentioning

confidence: 99%

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