Dynamic micro-Hall detection of superparamagnetic beads in a microfluidic channel

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:322

Letter

Aledealat, K.^1,2  Mihajlovic, G.³  Chen, K.^1,2  Field, M.⁴  Xiong, P.^1,2,5  Chase, P. B.^5,6  von Molnar, S.^1,2,5 

[1] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

[2] Florida State Univ, MARTECH, Tallahassee, FL 32306 USA

[3] San Jose Res Ctr, Hitachi Global Storage Technol, San Jose, CA 95135 USA

[4] Teledyne Sci Company LLC, Thousand Oaks, CA 90360 USA

[5] Florida State Univ, Integrat Nanosci Inst, Tallahassee, FL 32306 USA

[6] Florida State Univ, Dept Biol Sci, Tallahassee, FL 32306 USA

关键词: InAs quantum well;    Microfluidics;    Superparamagnetic bead;    Micro-Hall sensor;   

DOI  :  10.1016/j.jmmm.2010.08.006

来源: Elsevier

【 摘 要 】

We report integration of an InAs quantum well micro-Hall magnetic sensor with microfluidics and real-time detection of moving superparamagnetic beads. Beads moving within and around the Hall cross area result in positive and negative Hall voltage signals, respectively. Relative magnitudes and polarities of the signals measured for a random distribution of immobilized beads over the sensor are in good agreement with calculated values and explain consistently the shape of the dynamic signal. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

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