磁性纳米粒子
磁粉探伤
磁场
材料科学
纳米技术
粒子(生态学)
磁选
光散射
光学
散射
纳米颗粒
物理
量子力学
海洋学
地质学
冶金
作者
Tsukasa Takamura,Pil Ju Ko,Jaiyam Sharma,Ryoji Yukino,Shunji Ishizawa,Adarsh Sandhu
出处
期刊:Sensors
[MDPI AG]
日期:2015-06-04
卷期号:15 (6): 12983-12998
被引量:15
摘要
Magnetic particle-labeled biomaterial detection has attracted much attention in recent years for a number of reasons; easy manipulation by external magnetic fields, easy functionalization of the surface, and large surface-to-volume ratio, to name but a few. In this review, we report on our recent investigations into the detection of nano-sized magnetic particles. First, the detection by Hall magnetic sensor with lock-in amplifier and alternative magnetic field is summarized. Then, our approach to detect sub-200 nm diameter target magnetic particles via relatively large micoro-sized "columnar particles" by optical microscopy is described. Subsequently, we summarize magnetic particle detection based on optical techniques; one method is based on the scattering of the magnetically-assembled nano-sized magnetic bead chain in rotating magnetic fields and the other one is based on the reflection of magnetic target particles and porous silicon. Finally, we report recent works with reference to more familiar industrial products (such as smartphone-based medical diagnosis systems and magnetic removal of unspecific-binded nano-sized particles, or "magnetic washing").
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