Magnetic Nanoparticle Chains in Gelatin Ferrogels: Bioinspiration from Magnetotactic Bacteria
| Autor: | Karin Vogel, Bernd Büchner, Daniel Wolf, Axel Lubk, Micha Gratz, Elena V. Sturm, Helmut Cölfen, Sebastian Sturm, Damien Faivre, Maria Siglreitmeier |
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| Přispěvatelé: | Leibniz Institute for Solid State and Materials Research (IFW Dresden), Leibniz Association, University of Konstanz, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Saarland University [Saarbrücken], Microbiologie Environnementale et Moléculaire (MEM), Institut de Biosciences et Biotechnologies d'Aix-Marseille (ex-IBEB) (BIAM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Department of Colloid Chemistry [Potsdam], Max Planck Institute of Colloids and Interfaces, Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
electron holography magnetite Magnetotactic bacteria [SDV]Life Sciences [q-bio] electron tomography FOS: Physical sciences Nanoparticle 02 engineering and technology [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 01 natural sciences Electron holography Biomaterials gelatin Magnetization chemistry.chemical_compound Ferrimagnetism Electrochemistry ComputingMilieux_MISCELLANEOUS Magnetite Condensed Matter - Materials Science Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Electronic Optical and Magnetic Materials Magnetic anisotropy Chemical engineering Electron tomography chemistry bioinspiration ddc:540 0210 nano-technology |
| Zdroj: | Advanced Functional Materials Advanced Functional Materials 29(2019), 1905996 Advanced Functional Materials, 2019, pp.1905996. ⟨10.1002/adfm.201905996⟩ Advanced Functional Materials, Wiley, 2019, pp.1905996. ⟨10.1002/adfm.201905996⟩ |
| ISSN: | 1616-301X 1616-3028 |
| DOI: | 10.1002/adfm.201905996 |
| Popis: | 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 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). �� 2019 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| Databáze: | OpenAIRE |
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