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  Polar Structure Formation in Solid Solution of Strontium-Substituted Fluorapatite-Gelatin Composites: From Structural and Morphogenetic Aspects to Pyroelectric Properties

Knaus, J., Sommer, M., Duchstein, P., Gumeniuk, R., Akselrud, L., Sturm, S., et al. (2020). Polar Structure Formation in Solid Solution of Strontium-Substituted Fluorapatite-Gelatin Composites: From Structural and Morphogenetic Aspects to Pyroelectric Properties. Chemistry of Materials, 32(19), 8619-8632. doi:10.1021/acs.chemmater.0c02993.

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 Creators:
Knaus, Jennifer1, Author
Sommer, Martin1, Author
Duchstein, Patrick1, Author
Gumeniuk, Roman1, Author
Akselrud, Lev1, Author
Sturm, Sebastian1, Author
Auffermann, Gudrun2, Author              
Hennig, Christoph1, Author
Zahn, Dirk1, Author
Hulliger, Jürg1, Author
Sturm, Elena V.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Gudrun Auffermann, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863432              

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 Abstract: Strontium-substituted apatite-(CaF)-gelatin composites have been synthesized within a gelatin gel using the double-diffusion technique. All experimental parameters were kept constant while systematically varying the strontium/calcium molar ratio in solution. The effect of the presence of strontium ions in the growth solution on composition, morphogenesis, and morphology as well as pyroelectric properties of synthetic aggregates was systemically analyzed. It was shown that strontium ions significantly inhibit the growth process of composite aggregates and increase growth anisotropy along [0001], which were also confirmed and explained using molecular dynamic simulations. Furthermore, the promotion of the crystal branching processes and spherulite formation were observed. Pyroelectric microscopy (SPEM) measurements on mixed substituted apatite-(CaSrF)-gelatin composite aggregates showed an increase in polar properties, suggesting a lowering of the crystal symmetry. This was verified by Rietveld refinement of synchrotron powder X-ray diffraction, which revealed the noncentrosymmetric P63 apatite crystal structure. These data could shed new light on understanding piezoelectric and pyroelectric properties of apatite-based biological hard tissues. © 2020 American Chemical Society.

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Language(s): eng - English
 Dates: 2020-09-162020-09-16
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/acs.chemmater.0c02993
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Title: Chemistry of Materials
  Abbreviation : Chem. Mater.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 32 (19) Sequence Number: - Start / End Page: 8619 - 8632 Identifier: ISSN: 0897-4756
CoNE: https://pure.mpg.de/cone/journals/resource/954925561571