Magnetorelaxometry of magnetic nanoparticles in magnetically unshielded environment utilizing a differential fluxgate arrangement -: art. no. 106102
Magnetorelaxometry of magnetic nanoparticles in magnetically unshielded environment utilizing a differential fluxgate arrangement -: art. no. 106102
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DOI：
10.1063/1.2069776
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发表时间：
2005-10-01
影响因子：
1.6
通讯作者：
Schilling, M
中科院分区：
文献类型：
--
作者：
Ludwig, F;Mäuselein, S;Schilling, M
介绍了一种基于差分磁通门装置的磁弛豫测量系统。与单磁通门设置相比，使用两个磁通门磁力计将来自样品的弛豫信号增加了2倍，信噪比增加了2倍，并且允许在没有任何磁屏蔽的情况下执行磁弛豫测量。对于具有超顺磁性Fe3O4纳米颗粒和150 μ l的体积的样品，可以检测到100 nmol Fe，受限于磁通门传感器的固有噪声。(c)2005年美国物理学会。
A magnetorelaxometry system based on a differential fluxgate arrangement is presented. Compared to the single fluxgate setup, the use of two fluxgate magnetometers increases the relaxation signal from the sample by a factor of 2, the signal-to-noise ratio by a factor root 2, and allows one to perform magnetorelaxation measurements without any magnetic shielding. For a sample with superparamagnetic Fe3O4 nanoparticles and a volume of 150 mu l, 100 nmol Fe could be detected, limited by the intrinsic noise of the fluxgate sensors. (c) 2005 American Institute of Physics.