微流控通道中超顺磁珠的动态微霍尔检测
Dynamic micro-Hall detection of superparamagnetic beads in a microfluidic channel.
作者信息
Aledealat K, Mihajlović G, Chen K, Field M, Sullivan G J, Xiong P, Chase P B, von Molnár S
机构信息
Department of Physics and MARTECH, Florida State University, Tallahassee, FL 32306, United States.
出版信息
J Magn Magn Mater. 2010 Dec 1;322(24):L69-L72. doi: 10.1016/j.jmmm.2010.08.006.
Abstract
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.
摘要
我们报告了将一个砷化铟量子阱微霍尔磁传感器与微流体技术集成，并对移动的超顺磁珠进行实时检测。在霍尔交叉区域内和周围移动的珠子分别导致正霍尔电压信号和负霍尔电压信号。对于固定在传感器上的珠子随机分布所测量的信号的相对大小和极性与计算值高度吻合，并一致地解释了动态信号的形状。
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