English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Elongated magnetite nanoparticle formation from a solid ferrous precursor in a magnetotactic bacterium

Baumgartner, J., Menguy, N., Perez-Gonzalez, T., Morin, G., Widdrat, M., & Faivre, D. (2016). Elongated magnetite nanoparticle formation from a solid ferrous precursor in a magnetotactic bacterium. Journal of the Royal Society Interface, 13(124): 20160665. doi:10.1098/rsif.2016.0665.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-3344-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-3345-4
Genre: Journal Article

Files

show Files
hide Files
:
2378427.pdf (Publisher version), 3MB
Name:
2378427.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
:
2378427_supp.pdf (Supplementary material), 3MB
Name:
2378427_supp.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Baumgartner, Jens1, Author              
Menguy, Nicolas, Author
Perez-Gonzalez, Teresa1, Author              
Morin, Guillaume, Author
Widdrat, Marc1, Author              
Faivre, Damien1, Author              
Affiliations:
1Damien Faivre, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863290              

Content

show
hide
Free keywords: Open Access
 Abstract: Magnetotactic bacteria are aquatic microorganisms that intracellularly mineralize ferrimagnetic nanoparticles enabling the cells to align with the geomagnetic field. The bacteria produce a magnetic mineral of species-specific phase (magnetite Fe(II)Fe(III)2O4 or greigite Fe(II)Fe(III)2S4), size, morphology and particle assembly. Several species produce crystals of unusual elongated particle shapes, which break the symmetry of the thermodynamically favoured isometric morphology. Such morphologies are thought to affect domain size and orientation of the internal magnetization. Therefore, they are interesting study objects to develop new synthetic strategies for the morphological control of nanoparticles. We investigate the formation of such irregularly shaped nanomagnets in the species Desulfovibrio magneticus RS-1. In contrast to previously described organisms, this bacterium accumulates iron predominantly as Fe(II) rather than Fe(III) consistent with an alternative oxidative biomineralization route. Further, using high-resolution electron microscopy, we observe an epitaxial relationship between precursor and the final mineral phase supporting the notion of a solid-state transformation pathway. The precursor is likely a green rust previously thought to convert to magnetite only by dissolution and re-precipitation. Our findings represent a novel observation in the interconversion of iron (oxyhydr)oxide materials and suggest that solid-state growth processes could be required to produce irregularly shaped, elongated magnetite nanocrystals.

Details

show
hide
Language(s):
 Dates: 2016-11-23
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1098/rsif.2016.0665
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Journal of the Royal Society Interface
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London : Royal Society
Pages: - Volume / Issue: 13 (124) Sequence Number: 20160665 Start / End Page: - Identifier: ISSN: 1742-5689