GOALI: Ferrohydrodynamic Applications to Nanotechnology

abstractcts - 0084070 m。纳米级铁磁颗粒（~ 10nm大小）的胶体悬浮液的行为，将在有和没有载液的情况下进行研究。当由磁场驱动或控制时，这种流动可以显示出一些对实际应用有潜在兴趣的方面，特别感兴趣的是纳米机电设备（NEMS）。PI计划与工业伙伴密切合作，从根本上审视下列流程：宽度为100- 1000nm的通道流动：在交变磁场和行磁场下，它们可以在只有中等（甚至相反）有效粘度的情况下实现显著的流速。通过在通道表面设置合适的纳米线圈阵列，可以将旋转运动应用于无流体介质中的纳米颗粒。相反的效果，即对粒子施加流体力，粒子的旋转运动将反过来诱导电流进入纳米线圈。利用高温下为液态，室温下为固态的材料，可以实现机械纳米部件的制造。因此，有可能在高温下施加必要的磁场，以获得所需的流动形状，然后冻结。齿轮形状似乎是一个简单的第一步，以测试这种技术。将测试使用非磁性流体或表面活性剂，以降低表面张力，从而提高部件形状的详细质量。在实验/设计层面，与铁磁流体公司有一个强有力的合作。

AbstractCTS-0084070M. Zahn, MITThe behavior of colloidal suspensions of nanoscale ferromagnetic particles (~10 nm in size), with and without carrier fluid, will be investigated. Such flows, when driven or controlled by magnetic fields, can display a number of aspects of potential interest to practical applications of special interest are nano-electromechanical devices (NEMS). The PI plans to take a fundamental look at the following flows, in close cooperation with industrial partners: 1. Channel flows with a width of the order of 100-1000 nm: under alternating and traveling magnetic fields, they can achieve significant flow rates with only a moderate (or even reverse) effective viscosity.2. Rotational motion can be applied to nanoparticles in a fluid-free medium by a suitable array of nanocoils on the surface of the channel.3. The reverse effect, i.e. applying fluid force to particles, whose rotational motion will induce in turn an electric current into the nanocoils.4. The fabrication of mechanical nanocomponents can be accomplished by using a material which is in the liquid state of high temperature, but in the solid state at room temperature. Thus it is possible to apply at high temperature the magnetic fields necessary to give the desired flow shape, and then freeze. Gear shapes seem to be an easy first step to test this technique.5. The use of nonmagnetic fluids, or of surfactants, will be tested as way to reduce surface tension and therefore improve the detailed quality of the component shape.There is a strong collaboration contemplated with the Ferrofluids Corporation, at both experimental/design levels.