Controlled cobalt doping in the spinel structure of magnetosome magnetite: new evidences from element- and site-specific X-ray magnetic circular dichroism analyses
Li, Jinhua1,2; Menguy, Nicolas2,3; Arrio, Marie-Anne3; Sainctavit, Philippe3,4; Juhin, Amelie3; Wang, Yinzhao1,2; Chen, Haitao5; Bunau, Oana3; Otero, Edwige4; Ohresser, Philippe4; Pan, Yongxin1,2
2016-08-01
发表期刊JOURNAL OF THE ROYAL SOCIETY INTERFACE
卷号13期号:121
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.
文章类型Article
关键词Magnetotactic Bacteria Biomineralization Cobalt-doped Magnetite X-ray Magnetic Circular Dichroism Coordination Chemistry Magnetic Alteration
WOS标题词Science & Technology
DOI10.1098/rsif.2016.0355
收录类别SCI
语种英语
关键词[WOS]BIOMINERALIZATION PROTEIN MMS6 ; AMB-1 MAGNETOTACTIC BACTERIA ; FIELD CANCER-THERAPY ; NANOPARTICLES ; DISTRIBUTIONS ; BIOSYNTHESIS ; HYPERTHERMIA ; SIGNATURE ; BINDING ; SURFACE
WOS类目Multidisciplinary Sciences
WOS记录号WOS:000385993000019
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.idsse.ac.cn/handle/183446/1644
专题深海科学研究部_深海生物学研究室_海洋微生物分子生态学研究组
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
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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).
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