Assemblies of Aligned Magnetotactic Bacteria and Extracted Magnetosomes: What Is the Main Factor Responsible for the Magnetic Anisotropy?

被引：82

作者：

Alphandery, E. ^{[1
]}

Ding, Y. ^{[2
]}

Ngo, A. T. ^{[1
]}

Wang, Z. L. ^{[2
]}

Wu, L. F. ^{[3
]}

Pileni, M. P. ^{[1
]}

机构：

[1] Univ Paris 06, LM2N, F-75252 Paris 05, France

[2] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[3] CNRS, IMM, Chim Bacterienne Lab, F-13402 Marseille 20, France

来源：

ACS NANO | 2009年 / 3卷 / 06期

关键词：

magnetotactic bacteria; magnetosomes; magnetic anisotropy; easy axes; dipolar interactions; ELECTRON HOLOGRAPHY; NANOPARTICLES; MICROSTRUCTURE; NANOCRYSTALS; ORGANIZATION; FABRICATION; HYSTERESIS; MEMBRANE; FIELD;

D O I：

10.1021/nn900289n

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The origin of the magnetic anisotropy is explained in an assembly of aligned magnetic nanoparticles. For that, nanoparticles synthesized biologically by Magnetospirillum magneticum AMB-1 magnetotactic bacteria are used. For the first time, it is possible to differentiate between the two contributions arising from the alignment of the magnetosome easy axes and the strength of the magnetosome dipolar interactions. The magnetic anisotropy is shown to arise mainly from the dipolar interactions between the magnetosomes.

引用

页码：1539 / 1547

页数：9

共 35 条

[31] A MECHANISM OF MAGNETIC HYSTERESIS IN HETEROGENEOUS ALLOYS (REPRINTED FROM PHILOSOPHICAL TRANSACTION ROYAL SOCIETY-LONDON, VOL 240, PG 599-642, 1948) [J].