Sun L, Keshoju K, Xing H
Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA.
Nanotechnology. 2008 Oct 8;19(40):405603. doi: 10.1088/0957-4484/19/40/405603. Epub 2008 Aug 21.
The motion of magnetic nanowires can be manipulated by a magnetic field in liquids so that their distribution, alignment and orientation can be effectively controlled. The small dimensions of nanoscale entities result in an extremely low Reynolds number, and a steady state Stokes flow approximation was adopted to analyze the nanowire motion under the influences of applied field. The effects of fluid viscosity and external field on the motion of different sized nanowires were investigated. Polydimethylsiloxane composites with nickel nanowires as reinforcing fillers were synthesized as a demonstration of the effectiveness of magnetic alignment. Anisotropic magnetic properties and mechanical strengthening effects were explored.
磁性纳米线在液体中的运动可通过磁场进行操控，从而有效控制其分布、排列和取向。纳米级实体的小尺寸导致极低的雷诺数，因此采用稳态斯托克斯流近似来分析外加磁场影响下的纳米线运动。研究了流体粘度和外加磁场对不同尺寸纳米线运动的影响。合成了以镍纳米线作为增强填料的聚二甲基硅氧烷复合材料，以证明磁取向的有效性。探索了其各向异性磁性能和机械增强效果。
