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Strain-relief by single dislocation loops in calcite crystals grown on self-assembled monolayers

Title data

Ihli, Johannes ; Clark, Jesse N. ; Côté, Alexander S. ; Kim, Yi-Yeoun ; Schenk, Anna S. ; Kulak, Alexander N. ; Comyn, Timothy P. ; Chammas, Oliver ; Harder, Ross J. ; Duffy, Dorothy M. ; Robinson, Ian K. ; Meldrum, Fiona C.:
Strain-relief by single dislocation loops in calcite crystals grown on self-assembled monolayers.
In: Nature Communications. Vol. 7 (15 June 2016) . - Art.Nr. 11878.
ISSN 2041-1723
DOI: https://doi.org/10.1038/ncomms11878

Abstract in another language

Most of our knowledge of dislocation-mediated stress relaxation during epitaxial crystal growth comes from the study of inorganic heterostructures. Here we use Bragg coherent diffraction imaging to investigate a contrasting system, the epitaxial growth of calcite (CaCO3) crystals on organic self-assembled monolayers, where these are widely used as a model for biomineralization processes. The calcite crystals are imaged to simultaneously visualize the crystal morphology and internal strain fields. Our data reveal that each crystal possesses a single dislocation loop that occupies a common position in every crystal. The loops exhibit entirely different geometries to misfit dislocations generated in conventional epitaxial thin films and are suggested to form in response to the stress field, arising from interfacial defects and the nanoscale roughness of the substrate. This work provides unique insight into how self-assembled monolayers control the growth of inorganic crystals and demonstrates important differences as compared with inorganic substrates.

Further data

Item Type: Article in a journal
Refereed: Yes
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 12:59
Last Modified: 21 Feb 2017 12:59
URI: https://eref.uni-bayreuth.de/id/eprint/36169