Detection of the Concentration of MnFe<sub>2</sub>O<sub>4</sub> Magnetic Microparticles Using Giant Magnetoresistance Sensors

J. Xu; Q. Li; X. Y. Gao; F. F. Leng; M. Lü; P. Z. Guo; G. X. Zhao; S. D. Li

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Detection of the Concentration of MnFe₂O₄ Magnetic Microparticles Using Giant Magnetoresistance Sensors

机译：利用巨磁阻传感器检测MnFe _{2 O _{4 磁性微粒的浓度}}

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In order to explore the giant magnetoresistive (GMR) biodetection procedure, exchange-biased GMR sensors with a Wheatstone bridge were adopted to detect a series of concentrations of MnFeO magnetic microparticle alcohol solution using a direct current in-plane magnetic field measuring method. It is revealed that the output voltage of the transfer curve in the GMR sensor is sensitive to the magnetic microparticles and the maximum appears at a bias field around 2 Oe. The difference between with and without magnetic particles, , linearly increases with particle concentration undergoing a relationship of .30, indicating that the unknown concentration of MnFeO particles can be deduced from the measurement of . A lower detectable concentration limit of 12.5 /mL is available in the device at this moment, and it can be further improved by reducing the size of magnetic particles.

机译：为了探索巨磁阻（GMR）生物检测程序，采用带惠斯登电桥的交换偏置GMR传感器，采用直流面内磁场测量方法检测一系列浓度的MnFeO磁性微粒酒精溶液。结果表明，GMR传感器中传递曲线的输出电压对磁性微粒敏感，最大值出现在2 Oe附近的偏压场上。有磁性粒子与无磁性粒子之间的差异随粒子浓度经历.30关系而线性增加，表明MnFeO粒子的未知浓度可以从的测量推导出。目前设备中的可检测浓度下限为12.5 / mL，可以通过减小磁性颗粒的尺寸进一步提高。

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来源
《IEEE Transactions on Magnetics》 |2016年第4期|1-4|共4页
作者
J. Xu; Q. Li; X. Y. Gao; F. F. Leng; M. Lü; P. Z. Guo; G. X. Zhao; S. D. Li;
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作者单位

J. Xu is with College of Physics, and Key Laboratory of Photonics Materials and Technology in Universities of Shandong, Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao, 266071, China.;

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正文语种 eng
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GMR sensor; Giant magnetoresistive (GMR) sensor; Magnetic biorecognition; magnetic; magnetic biorecognition; magnetic nanoparticles; nanoparticles;

机译：GMR传感器;巨磁阻（GMR）传感器;磁性生物识别;磁性;磁性生物识别;磁性纳米粒子;纳米粒子;

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Detection of the Concentration of MnFe2O4 Magnetic Microparticles Using Giant Magnetoresistance Sensors

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Detection of the Concentration of MnFe₂O₄ Magnetic Microparticles Using Giant Magnetoresistance Sensors