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Micron-sized biogenic and synthetic hollow mineral spheres occlude additives within single crystals. | LitMetric

Micron-sized biogenic and synthetic hollow mineral spheres occlude additives within single crystals.

Faraday Discuss

EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, The King's Buildings, David Brewster Road, Edinburgh EH9 3FJ, UK.

Published: July 2022

AI Article Synopsis

Article Abstract

Incorporating additives within host single crystals is an effective strategy for producing composite materials with tunable mechanical, magnetic and optical properties. The type of guest materials that can be occluded can be limited, however, as incorporation is a complex process depending on many factors including binding of the additive to the crystal surface, the rate of crystal growth and the stability of the additives in the crystallisation solution. In particular, the size of occluded guests has been restricted to a few angstroms - as for single molecules - to a few hundred nanometers - as for polymer vesicles and particles. Here, we present a synthetic approach for occluding micrometer-scale objects, including high-complexity unicellular organisms and synthetic hollow calcite spheres within calcite single crystals. Both of these objects can transport functional additives, including organic molecules and nanoparticles that would not otherwise occlude within calcite. Therefore, this method constitutes a generic approach using calcite as a delivery system for active compounds, while providing them with effective protection against environmental factors that could cause degradation.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9281370PMC
http://dx.doi.org/10.1039/d1fd00095kDOI Listing

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