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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/47232

Title: Artificial Magnetic Bacteria: Living Magnets at Room Temperature
Authors: Martín Marcos, Miguel Ángel
Carmona Rodríguez-Acosta, Fernando
Cuesta Martos, Rafael
Rondón, Deyanira
Gálvez Rodríguez, Natividad
Domínguez Vera, José Manuel
Issue Date: 2014
Abstract: Biogenic magnetite is a fascinating example of how nature can generate functional magnetic nanostructures. Inspired by the magnetic bacteria, an attempt is made to mimic their magnetic properties, rather than their structures, to create living magnets at room temperature. The non-magnetic probiotic bacteria Lactobacillus fermentum and Bifidobacteria breve are used as bioplatforms to densely arrange superparamagnetic nanoparticles on their external surfaces, thus obtaining the artificial magnetic bacteria. Magnetic probiotic bacteria can be produced by using superparamagnetic maghemite nanoparticles assembled at their surfaces. They present a collective ferromagnetic phase at room temperature. The blocking temperature of these maghemite nanoparticles increases more than 100 K when assembled at the artificial magnetic bacteria.
Sponsorship: This work was funded by Biosearch S. A. (POSTBIO project-Agency for Innovation and Development of Andalucia IDEA) and by MINECO and FEDER (project CTQ2012–32236).
Publisher: Wiley - VCH Verlag GmbH and Co. KGaA
Description: "This is the peer reviewed version of the following article: Martín Marcos, M.A.; et al. Artificial Magnetic Bacteria: Living Magnets at Room Temperature. Advanced Functional Materials, 24(23): 3489-3493 (2014), which has been published in final form at http://dx.doi.org/10.1002/adfm.201303754 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."
Keywords: Metal nanoparticles
Magnetic nanoparticles
Bacteria
Living magnets
Biomimetics
URI: http://hdl.handle.net/10481/47232
ISSN: 1616-3028
1616-301X
Citation: Martín Marcos, M.A.; et al. Artificial Magnetic Bacteria: Living Magnets at Room Temperature. Advanced Functional Materials, 24(23): 3489-3493 (2014). [http://hdl.handle.net/10481/47232]
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