Controlled cobalt doping in the spinel structure of magnetosome magnetite: new evidences from element- and site-specific X-ray magnetic circular dichroism analyses

doi:10.1098/rsif.2016.0355

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Controlled cobalt doping in the spinel structure of magnetosome magnetite: new evidences from element- and site-specific X-ray magnetic circular dichroism analyses
	Li, Jinhua 1,2; Menguy, Nicolas 2,3; Arrio, Marie-Anne 3; Sainctavit, Philippe 3,4; Juhin, Amelie 3; Wang, Yinzhao 1,2; Chen, Haitao 5; Bunau, Oana 3; Otero, Edwige 4; Ohresser, Philippe 4
刊名	JOURNAL OF THE ROYAL SOCIETY INTERFACE
	2016-08-01
卷号	13 期号:121
关键词	magnetotactic bacteria biomineralization cobalt-doped magnetite X-ray magnetic circular dichroism coordination chemistry magnetic alteration
DOI	10.1098/rsif.2016.0355
文献子类	Article
英文摘要	The biomineralization of magnetite nanocrystals (called magnetosomes) by magnetotactic bacteria (MTB) has attracted intense interest in biology, geology and materials science due to the precise morphology of the particles, the chain-like assembly and their unique magnetic properties. Great efforts have been recently made in producing transition metal-doped magnetosomes with modified magnetic properties for a range of applications. Despite some successful outcomes, the coordination chemistry and magnetism of such metal-doped magnetosomes still remain largely unknown. Here, we present new evidences from X-ray magnetic circular dichroism (XMCD) for element- and site-specific magnetic analyses that cobalt is incorporated in the spinel structure of the magnetosomes within Magnetospirillum magneticum AMB-1 through the replacement of Fe-2+ ions by Co2+ ions in octahedral (O-h) sites of magnetite. Both XMCD at Fe and Co L-2,L-3 edges, and energy-dispersive X-ray spectroscopy on transmission electron microscopy analyses reveal a heterogeneous distribution of cobalt occurring either in different particles or inside individual particles. Compared with non doped one, cobalt-doped magnetosome sample has lower Verwey transition temperature and larger magnetic coercivity, related to the amount of doped cobalt. This study also demonstrates that the addition of trace cobalt in the growth medium can significantly improve both the cell growth and the magnetosome formation within M. magneticum AMB-1. Together with the cobalt occupancy within the spinel structure of magnetosomes, this study indicates that MTB may provide a promising biomimetic system for producing chains of metal-doped single-domain magnetite with an appropriate tuning of the magnetic properties for technological and biomedical applications.
WOS关键词	BIOMINERALIZATION PROTEIN MMS6 ; AMB-1 MAGNETOTACTIC BACTERIA ; FIELD CANCER-THERAPY ; NANOPARTICLES ; DISTRIBUTIONS ; BIOSYNTHESIS ; HYPERTHERMIA ; SIGNATURE ; BINDING ; SURFACE
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000385993000019
资助机构	National Natural Science Foundation of China(41374004 ; National Natural Science Foundation of China(41374004 ; French programme ANR-blanc ; French programme ANR-blanc ; State Key Laboratory of Lithospheric Evolution (SKLLE, Beijing) ; State Key Laboratory of Lithospheric Evolution (SKLLE, Beijing) ; 41522402 ; 41522402 ; 41330104) ; 41330104) ; National Natural Science Foundation of China(41374004 ; National Natural Science Foundation of China(41374004 ; French programme ANR-blanc ; French programme ANR-blanc ; State Key Laboratory of Lithospheric Evolution (SKLLE, Beijing) ; State Key Laboratory of Lithospheric Evolution (SKLLE, Beijing) ; 41522402 ; 41522402 ; 41330104) ; 41330104)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/53299]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Paleomagnetism & Geochronol Lab, Beijing 100029, Peoples R China 2.Chinese Acad Sci, France China Biomineralizat & Nanostruct Lab, Beijing 100029, Peoples R China 3.Sorbonne Univ, IMPMC, CNRS UMR 7590, MNHN,UPMC,IRD UMR 206, F-75005 Paris, France 4.Synchrotron SOLEIL, LOrme des Merisiers St Aubin, F-91192 Gif Sur Yvette, France 5.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
推荐引用方式 GB/T 7714	Li, Jinhua,Menguy, Nicolas,Arrio, Marie-Anne,et al. Controlled cobalt doping in the spinel structure of magnetosome magnetite: new evidences from element- and site-specific X-ray magnetic circular dichroism analyses[J]. JOURNAL OF THE ROYAL SOCIETY INTERFACE,2016,13(121).
APA	Li, Jinhua.,Menguy, Nicolas.,Arrio, Marie-Anne.,Sainctavit, Philippe.,Juhin, Amelie.,...&Pan, Yongxin.(2016).Controlled cobalt doping in the spinel structure of magnetosome magnetite: new evidences from element- and site-specific X-ray magnetic circular dichroism analyses.JOURNAL OF THE ROYAL SOCIETY INTERFACE,13(121).
MLA	Li, Jinhua,et al."Controlled cobalt doping in the spinel structure of magnetosome magnetite: new evidences from element- and site-specific X-ray magnetic circular dichroism analyses".JOURNAL OF THE ROYAL SOCIETY INTERFACE 13.121(2016).