Biomimetic control of crystal assembly by growth in an organic hydrogel network

Grassmann, Olaf; Neder, Reinhard B.; Putnis, Andrew; Löbmann, Peer

doi:10.2138/am-2003-0418

Cited by 103 publications

(142 citation statements)

References 15 publications

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“…Organic surfaces or matrices template the oriented nucleation and growth of nanocrystals in biomimetic systems. Examples include the oriented arrays of magnetite nanocrystals on polyvinyl alcohol surfaces [51], assemblies of goethite nanocrystals formed on polysaccharide alginic acid fibrils [52], and spectacular pseudo-octahedral calcite "single" crystals composed of highly aligned nanocrystals that formed in a polyacrylamide hydrogel network [53]. Oriented arrays of magnetite nanocrystals occur in plants and produce single crystal-like SAED patterns [3].…”

Section: Discussionmentioning

confidence: 99%

Properties of intracellular magnetite crystals produced by Desulfovibrio magneticus strain RS-1

Pósfai

Moskowitz

Arató

et al. 2006

Earth and Planetary Science Letters

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Desulfovibrio magneticus strain RS-l is an anaerobic sulfate-reducing bacterium. Cells form intracellular nanocrystals of magnetite but are only weakly magnetotactic. In order to understand the unusual magnetic response of this strain, we studied magnetite crystals within cells grown with fumarate and sulfate. Many cells grown under either condition did not form magnetic crystals while others contained only 1 to 18 small (~40 nm) magnetite-containing magnetosomes. Bulk magnetic measurements of whole cells showed a superparamagnetic-like behavior, indicating that many of the magnetite crystals are too small to have a permanent magnetic moment at ambient temperature. The temperature of the Verwey transition is lower (~ 86 K) than of magnetite from other magnetotactic strains, likely indicating partial oxidation of magnetite into maghemite. As a result of the small size and small number of magnetite magnetosomes, the magnetic moments of most cells grown anaerobically with fumarate or sulfate are insufficient for magnetotaxis.In addition to intracellular magnetite, in some cultures another iron oxide, hematite, formed on the surfaces of cells. The hematite grains are embedded in an extracellular polymeric material, indicating that the crystals likely resulted from a biologically induced mineralization process. Although the hematite particles appear to consist of aggregations of many small (5 to 10 nm) grains, the grains have a consensus orientation and thus the whole particle diffracts as a single crystal. The aligned arrangement of nanoparticles within larger clusters may reflect either a templated nucleation of hematite crystallites in an extracellular organic matrix, or result from a self-assembling process during the crystallization of hematite from ferric gels or ferrihydrite.

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Section: Discussionmentioning

confidence: 99%

Properties of intracellular magnetite crystals produced by Desulfovibrio magneticus strain RS-1

Pósfai

Moskowitz

Arató

et al. 2006

Earth and Planetary Science Letters

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“…Actually, the occurrence of nanocrystalline particles and aggregation based morphologies within an organic matrix seems be key features of biomineralization. [13,27] Precipitation of calcium phosphate and carbonate nanoparticles on diverse substrates in relation to gelly-like substances may be the dominant mechanism of phosphate and carbonate formation in some geologic, microbially-mediated biosedimentary structures (Figs. 2-5) [7,31] and in some calcified tissues (Figs.…”

Section: Kinetics Constraints On Crystal Growth Of Carbonate and Phosmentioning

confidence: 99%

“…[7,31] It has been shown that gelly-like media favour the nucleation and the formation of clusters of nanocrystals within hydrogel networks. [27] High supersaturation occurring in gel media leads to the formation of assemblies of nanometer-sized crystalline particles that actually constitute the building blocks of larger crystalline aggregates. These textural features are less frequently formed in crystal-growth from diluted solutions.…”

Section: Kinetics Constraints On Crystal Growth Of Carbonate and Phosmentioning

confidence: 99%

Crystal Growth of Inorganic and Biomediated Carbonates and Phosphates

Navas¹,

Martín‐Algarra²,

Roman³

et al. 2013

Advanced Topics on Crystal Growth

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“…Early examples of calcium carbonate mesocrystals utilized silica, gelatin, and polyacrylamide gels. [Dominquez-Bella and GarciaRuiz, 1986;Grassmann et al, 2002Grassmann et al, , 2003] More elegant and selective method was shown using poly(styrene sulfonate). Poly(styrene sulfonate) adsorbed selectively on highly polar (001) faces of calcite to generate porous mesocrystals with crystallographically well-ordered primary particles.…”

Section: Additives To Regulate the Crystallization Of Calcium Carbonatementioning

confidence: 99%

Biomimetic and Bioinspired Crystallization with Macromolecular Additives

Kim¹

2012

Crystallization and Materials Science of Modern Artificial and Natural Crystals

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Biomimetic control of crystal assembly by growth in an organic hydrogel network

Cited by 103 publications

References 15 publications

Properties of intracellular magnetite crystals produced by Desulfovibrio magneticus strain RS-1

Properties of intracellular magnetite crystals produced by Desulfovibrio magneticus strain RS-1

Crystal Growth of Inorganic and Biomediated Carbonates and Phosphates

Biomimetic and Bioinspired Crystallization with Macromolecular Additives

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