High-magnetic-field electromagnetophoresis of micro-particles in a capillary flow system.
High-magnetic-field electromagnetophoresis of micro-particles in a capillary flow system.
复制标题
DOI：
10.1016/j.chroma.2003.10.134
复制
发表时间：
2004-04
期刊：
影响因子：
--
通讯作者：
Yoshinori Iiguni;M. Suwa;H. Watarai
中科院分区：
文献类型：
--
作者：
Yoshinori Iiguni;M. Suwa;H. Watarai
在毛细管流动系统中，用均匀磁场对电流施加直角，证明了微颗粒的电磁电泳迁移。我们利用10T的强磁场来观察这一现象。当电流方向改变时，流动的水介质中的聚苯乙烯乳胶颗粒受施加在介质上的洛伦兹力的影响而进行之字形迁移。碳颗粒也以同样的方式与聚苯乙烯颗粒迁移。此外，我们还尝试了生物颗粒的电磁电泳迁移，如酵母和人类红细胞。垂直于流动的迁移速度分量与电流和磁通密度均成正比。这些结果证明，之字形迁移的主导力量是在流动介质中产生的电磁电泳浮力。此外，还发现在10T的磁场中对颗粒施加的力足以使吸附在毛细壁上的颗粒解吸。
The electromagnetophoretic migration of micro-particles in a capillary flow system was demonstrated using a homogeneous magnetic field applied at right angles to an electric current. We utilized a high-magnetic-field of 10T for observing this phenomenon. When the direction of the electric current was alternatively changed, polystyrene latex particles in a flowing aqueous medium migrated zigzag affected by a Lorentz force exerted on the medium. Carbon particles also migrated in the same manner with polystyrene particles. Further, we tried the electromagnetophoretic migration of biological particles, such as yeasts and human red blood cells. The migration velocity component perpendicular to the flow was proportional to both the electric current and the magnetic flux density. These results proved that the dominant force of the zigzag migration was an electromagnetophoretic buoyancy generated in the flowing medium. Moreover, it was found that the force exerted on the particles in the magnetic field of 10T was sufficient for the desorption of particles adsorbed on the capillary wall.