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Magnetic Nanoparticle Chains in Gelatin Ferrogels : Bio-inspiration from Magnetotactic Bacteria

Magnetic Nanoparticle Chains in Gelatin Ferrogels : Bio-inspiration from Magnetotactic Bacteria

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STURM, Sebastian, Maria SIGLREITMEIER, Daniel WOLF, Karin VOGEL, Micha GRATZ, Damien FAIVRE, Axel LUBK, Bernd BÜCHNER, Elena V. STURM, Helmut CÖLFEN, 2019. Magnetic Nanoparticle Chains in Gelatin Ferrogels : Bio-inspiration from Magnetotactic Bacteria. In: Advanced Functional Materials. 7(45), 1905996. ISSN 1616-301X. eISSN 1616-3028. Available under: doi: 10.1002/adfm.201905996

@article{Sturm2019Magne-46694, title={Magnetic Nanoparticle Chains in Gelatin Ferrogels : Bio-inspiration from Magnetotactic Bacteria}, year={2019}, doi={10.1002/adfm.201905996}, number={45}, volume={7}, issn={1616-301X}, journal={Advanced Functional Materials}, author={Sturm, Sebastian and Siglreitmeier, Maria and Wolf, Daniel and Vogel, Karin and Gratz, Micha and Faivre, Damien and Lubk, Axel and Büchner, Bernd and Sturm, Elena V. and Cölfen, Helmut}, note={Article Number: 1905996} }

Sturm, Elena V. Lubk, Axel Gratz, Micha 2019-08-19T11:36:51Z Gratz, Micha Magnetic Nanoparticle Chains in Gelatin Ferrogels : Bio-inspiration from Magnetotactic Bacteria Siglreitmeier, Maria 2019 Faivre, Damien Vogel, Karin Inspired by chains of ferrimagnetic nanocrystals (NCs) in magnetotactic bacteria (MTB), the synthesis and detailed characterization of ferrimagnetic magnetite NC chain‐like assemblies is reported. An easy green synthesis route in a thermoreversible gelatin hydrogel matrix is used. The structure of these magnetite chains prepared with and without gelatin is characterized by means of transmission electron microscopy, including electron tomography (ET). These structures indeed bear resemblance to the magnetite assemblies found in MTB, known for their mechanical flexibility and outstanding magnetic properties and known to crystallographically align their magnetite NCs along the strongest <111> magnetization easy axis. Using electron holography (EH) and angular dependent magnetic measurements, the magnetic interaction between the NCs and the generation of a magnetically anisotropic material can be shown. The electro‐ and magnetostatic modeling demonstrates that in order to precisely determine the magnetization (by means of EH) inside chain‐like NCs assemblies, their exact shape, arrangement and stray‐fields have to be considered (ideally obtained using ET). Vogel, Karin Faivre, Damien Cölfen, Helmut Cölfen, Helmut Sturm, Sebastian Siglreitmeier, Maria Wolf, Daniel Büchner, Bernd eng 2019-08-19T11:36:51Z Wolf, Daniel Lubk, Axel Sturm, Elena V. Sturm, Sebastian Büchner, Bernd terms-of-use

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