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Hierarchical Calcite Crystals with Occlusions of a Simple Polyelectrolyte Mimic Complex Biomineral Structures

Title data

Schenk, Anna S. ; Zlotnikov, Igor ; Pokroy, Boaz ; Gierlinger, Notburga ; Masic, Admir ; Zaslansky, Paul ; Fitch, Andrew N. ; Paris, Oskar ; Metzger, Till H. ; Cölfen, Helmut ; Fratzl, Peter ; Aichmayer, Barbara:
Hierarchical Calcite Crystals with Occlusions of a Simple Polyelectrolyte Mimic Complex Biomineral Structures.
In: Advanced Functional Materials. Vol. 22 (2012) Issue 22 . - pp. 4668-4676.
ISSN 1616-301X
DOI: https://doi.org/10.1002/adfm.201201158

Abstract in another language

Biominerals are complex inorganic-organic structures that often show excellent mechanical properties. Here a bio-inspired study of a remarkably simple synthetic system is presented in which only one charged polymer additive (poly(sodium 4-styrenesulfonate)) is able to induce hierarchical structuring of calcite similar to biominerals. The interaction of the negatively charged polymer with the nucleation and growth of the mineral, in particular via selective adsorption to internal and external (001) facets of the calcite lattice, implies structural features from the micrometer down to the nanometer level. The crystals exhibit a distinct rounded morphology and a controlled orientation. Moreover, the polymer molecules are occluded within the crystals with different concentrations in well-defined regions. This leads to the induction of a mesoscale structure based on 100 nm sized mineral building blocks with granular substructure and rough surface, as well as small modifications of the crystallographic structure. Such a combination of hierarchically organized structural features has previously only been reported for biogenic calcite, which is typically grown in a complex process involving multiple organic additives. It is also shown that the organic occlusions in the calcite-PSS hybrid crystals strongly affect the mechanical performance, as known for some biominerals.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: biomimetics; polymer-mediated crystallization; calcium carbonate; mesocrystals; hierarchical structures
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Juniorprofessur Kolloidale Systeme > Juniorprofessur Kolloidale Systeme - Juniorprof. Dr. Anna Schenk
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Juniorprofessur Kolloidale Systeme
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 21 Feb 2017 09:57
Last Modified: 21 Feb 2017 10:46
URI: https://eref.uni-bayreuth.de/id/eprint/36161