Buscar

 Detalle_Publicacion

Configuration of the magnetosome chain: a natural magnetic nanoarchitecture

Abstract: Magnetospirillum gryphiswaldense is a microorganism with the ability to biomineralize magnetite nanoparticles, called magnetosomes, and arrange them into a chain that behaves like a magnetic compass. Rather than straight lines, magnetosome chains are slightly bent, as evidenced by electron cryotomography. Our experimental and theoretical results suggest that due to the competition between the magnetocrystalline and shape anisotropies, the effective magnetic moment of individual magnetosomes is tilted out of the [111] crystallographic easy axis of magnetite. This tilt does not affect the direction of the chain net magnetic moment, which remains along the [111] axis, but explains the arrangement of magnetosomes in helical-like shaped chains. Indeed, we demonstrate that the chain shape can be reproduced by considering an interplay between the magnetic dipolar interactions between magnetosomes, ruled by the orientation of the magnetosome magnetic moment, and a lipid/protein-based mechanism, modeled as an elastic recovery force exerted on the magnetosomes.

 Autoría: Orue I., Marcano L., Bender P., García-Prieto A., Valencia S., Mawass M., Gil-Cartón D., Alba Venero D., Honecker D., García-Arribas A., Fernández Barquín L., Muela A., Fdez-Gubieda M.,

 Fuente: Nanoscale, 2018,10, 7407-7419

Editorial: Royal Society of Chemistry

 Fecha de publicación: 26/02/2018

Nº de páginas: 13

Tipo de publicación: Artículo de Revista

DOI: 10.1039/c7nr08493e

ISSN: 2040-3364,2040-3372

Proyecto español: MAT2014-55049-C2-R : MAT2017-83631-C3-R

Url de la publicación: https://doi.org/10.1039/c7nr08493e

Autores/as

ORUE GOIKURIA, IÑAKI

MARCANO PRIETO, LOURDES

PHILIPP FLORIAN BENDER

GARCÍA PRIETO, ANA

VALENCIA, SERGIO

MAWASS, MOHAMAD ASSAAD

GIL CARTÓN, DAVID

DIEGO ALBA VENERO

HONECKER, DIRK

GARCÍA ARRIBAS, ALFREDO

MUELA BLÁZQUEZ, ALICIA

MARIA LUISA FERNANDEZ-GUBIEDA RUIZ