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Construction and validation of simple magnetic nanoparticle detector based on giant magnetoresistive effect

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Chemical Research in Chinese Universities Aims and scope

Abstract

The finding of giant magnetoresistive(GMR) effect develops a new field for the sensing application with magnetic nanoparticles(MNPs) labeling. A convenient GMR sensor was built with a permanent magnet to excite the MNPs in this work. The sensing element contained a Wheatstone bridge with the GMR material as one of its branches. The magnetic field from MNPs unbalanced the Wheatstone bridge. After being amplified, the output signals were recorded. The construction and optimization of the magnetoresistive sensing platform were discussed in detail. The detection of three kinds of MNPs validated the performance of the proposed GMR sensor. The sensor showed a fast response to the addition or removal of MNPs. Because of its simplicity, this kind of GMR sensor can be developed in a routine laboratory. The finding of this new GMR sensor will promote the development of the method of probing biomolecules and the study on the biomolecular interaction after being labeled magnetically.

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Authors and Affiliations

  1. Department of Chemistry and Environmental Sciences, Kashgar Teachers College, Kashgar, 844006, P. R. China

    Xuebo Yin

  2. State Key Laboratory of Medicinal Chemical Biology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University, Tianjin, 300071, P. R. China

    Chunying Cheng, Youying Xin & Xuebo Yin

Authors
  1. Chunying Cheng
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  2. Youying Xin
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  3. Xuebo Yin
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Corresponding author

Correspondence to Xuebo Yin.

Additional information

Supported by the National Basic Research Program of China(No.2011CB707703), the National Natural Science Foundation of China(Nos.21375064, 21075068) and the Fundamental Research Funds for the Central Universities of China(No.20130031110016).

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Cheng, C., Xin, Y. & Yin, X. Construction and validation of simple magnetic nanoparticle detector based on giant magnetoresistive effect. Chem. Res. Chin. Univ. 30, 743–748 (2014). https://doi.org/10.1007/s40242-014-4023-0

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  • DOI: https://doi.org/10.1007/s40242-014-4023-0

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