| 巨磁电阻传感器对铁磁流体的动态检测 |
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| 引用本文： | 石海平,冯洁,陈翔,李福泉.巨磁电阻传感器对铁磁流体的动态检测[J].仪器仪表学报,2011,32(5):1033-1037. |
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| 作者姓名： | 石海平 冯洁 陈翔 李福泉 |
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| 作者单位： | 上海交通大学微纳科学技术研究院,上海,200240 |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划863项目 |
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| 摘 要： | 研究一种集成微流道的巨磁电阻(GMR)传感器对铁磁流体的动态检测.利用SU-8胶和PDMS键合在巨磁电阻传感器上集成微流道.铁磁流体为直径10 nm的Fe304悬浮溶液.巨磁电阻传感器通过直接测量铁磁流体流过有效检测区域时磁珠的感应场,实现对铁磁流体的动态检测.为使检测的灵敏度最大,综合考虑了外加磁场对传感器灵敏度和磁...
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| 关 键 词： | 巨磁电阻 磁传感器 铁磁流体 微流体 |
Dynamic detection of ferrofluid with giant magnetoresistance sensor |
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| Shi Haiping,Feng Jie,Chen Xiang,Li Fuquan.Dynamic detection of ferrofluid with giant magnetoresistance sensor[J].Chinese Journal of Scientific Instrument,2011,32(5):1033-1037. |
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| Authors: | Shi Haiping Feng Jie Chen Xiang Li Fuquan |
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| Affiliation: | Shi Haiping,Feng Jie,Chen Xiang,Li Fuquan(National Key Laboratory of Micro/ Nano Fabrication Technology,Shanghai Jiaotong University,Shanghai 200240,China) |
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| Abstract: | A giant magnetoresistance(GMR) sensor with integrated microfludic channel was studied for the dynamic detection of ferrofluid.The microfludic channel is integrated by SU-8 glue and PDMS bonding.The ferrofluid is a 10 nm Fe3O4 suspension.The dynamic detection is carried out by directly measuring the fringe fields generated from superparamagnetic beads when the ferrofluid passes the active sensing area of a GMR sensor.To maximizing the detection sensitivity,the effect of the applied magnetic fields on both th... |
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| Keywords: | giant magnetoresistance magnetic sensor ferrofluid microfluid |
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