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Mineralization of iron oxide by ferritin homopolymers immobilized on SiO<sub>2</sub> nanoparticles

Mineralization of iron oxide by ferritin homopolymers immobilized on SiO2 nanoparticles

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CARMONA, Daniel, Laura TRECCANI, Monika MICHAELIS, Steffen LID, Christian DEBUS, Lucio Colombi CIACCHI, Kurosch REZWAN, Michael MAAS, 2019. Mineralization of iron oxide by ferritin homopolymers immobilized on SiO2 nanoparticles. In: Bioinspired, Biomimetic and Nanobiomaterials. 8(1), pp. 16-27. ISSN 2045-9858. eISSN 2045-9866. Available under: doi: 10.1680/jbibn.18.00038

@article{Carmona2019-03Miner-45604, title={Mineralization of iron oxide by ferritin homopolymers immobilized on SiO2 nanoparticles}, year={2019}, doi={10.1680/jbibn.18.00038}, number={1}, volume={8}, issn={2045-9858}, journal={Bioinspired, Biomimetic and Nanobiomaterials}, pages={16--27}, author={Carmona, Daniel and Treccani, Laura and Michaelis, Monika and Lid, Steffen and Debus, Christian and Ciacchi, Lucio Colombi and Rezwan, Kurosch and Maas, Michael} }

Debus, Christian Lid, Steffen Mineralization of iron oxide by ferritin homopolymers immobilized on SiO<sub>2</sub> nanoparticles Debus, Christian Michaelis, Monika Maas, Michael Carmona, Daniel 2019-04-09T12:00:26Z Treccani, Laura Michaelis, Monika 2019-04-09T12:00:26Z Maas, Michael The iron storage protein ferritin is well known for its ability to mineralize iron oxides in its interior cavity. In this study, the authors investigated the mineralization behavior of H and L ferritin homopolymers assembled from individual subunits. The authors’ approach included molecular dynamics simulations, which suggested that ferritin subunits arrange themselves on silica surfaces with the active side facing away from the interface, although non covalent adsorption interactions might be weak. In experimental studies, the nucleation of iron oxide nuclei could be observed at ferritin homopolymers which were covalently immobilized through the EDC/NHS strategy at the surface of silica nanoparticles. Mineralization was initiated by the addition of ammonium iron (II) sulfate hexahydrate ((NH<sub>4</sub>)<sub>2</sub>Fe(SO<sub>4</sub>)<sub>2</sub>·6H<sub>2</sub>O) as the source of iron ions and trimethylamine N-oxide as the oxidant. The results demonstrate that immobilized H and L ferritin homopolymers on silica surfaces are able to induce the formation of a cohesive thin film of magnetic iron oxide crystals (magnetite and/or maghemite). Ciacchi, Lucio Colombi 2019-03 eng Lid, Steffen Rezwan, Kurosch Carmona, Daniel Ciacchi, Lucio Colombi Treccani, Laura Rezwan, Kurosch

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