Artificial Magnetic Bacteria: Living Magnets at Room Temperature Martín Marcos, Miguel Ángel Carmona Rodríguez-Acosta, Fernando Cuesta Martos, Rafael Rondón, Deyanira Gálvez Rodríguez, Natividad Domínguez Vera, José Manuel Metal nanoparticles Magnetic nanoparticles Bacteria Living magnets Biomimetics "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." 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. 2017-07-21T11:27:57Z 2017-07-21T11:27:57Z 2014 info:eu-repo/semantics/article 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] 1616-3028 1616-301X http://hdl.handle.net/10481/47232 10.1002/adfm.201303754 eng info:eu-repo/semantics/openAccess Wiley - VCH Verlag GmbH and Co. KGaA