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Bio-inspired formation of functional calcite/metal oxide nanoparticle composites

Title data

Kim, Yi-Yeoun ; Schenk, Anna S. ; Walsh, Dominic ; Kulak, Alexander N. ; Cespedes, Oscar ; Meldrum, Fiona C.:
Bio-inspired formation of functional calcite/metal oxide nanoparticle composites.
In: Nanoscale. Vol. 6 (2014) Issue 2 . - pp. 852-859.
ISSN 2040-3372
DOI: https://doi.org/10.1039/C3NR05081E

Abstract in another language

Biominerals are invariably composite materials, where occlusion of organic macromolecules within single crystals can significantly modify their properties. In this article, we take inspiration from this biogenic strategy to generate composite crystals in which magnetite (Fe3O4) and zincite (ZnO) nanoparticles are embedded within a calcite single crystal host, thereby endowing it with new magnetic or optical properties. While growth of crystals in the presence of small molecules, macromolecules and particles can lead to their occlusion within the crystal host, this approach requires particles with specific surface chemistries. Overcoming this limitation, we here precipitate crystals within a nanoparticle-functionalised xyloglucan gel, where gels can also be incorporated within single crystals, according to their rigidity. This method is independent of the nanoparticle surface chemistry and as the gel maintains its overall structure when occluded within the crystal, the nanoparticles are maintained throughout the crystal, preventing, for example, their movement and accumulation at the crystal surface during crystal growth. This methodology is expected to be quite general, and could be used to endow a wide range of crystals with new functionalities.

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 10:45
Last Modified: 21 Feb 2017 10:45
URI: https://eref.uni-bayreuth.de/id/eprint/36163