GOALI: Ferrohydrodynamic Applications to Nanotechnology

摘要CTS-0084070M。麻省理工学院的 Zahn 将研究纳米级铁磁颗粒（尺寸约 10 nm）的胶体悬浮液在有或没有载液的情况下的行为。 当由磁场驱动或控制时，这种流动可以显示出纳米机电器件（NEMS）等实际应用中潜在感兴趣的许多方面。 PI计划与工业合作伙伴密切合作，从根本上研究以下流动： 1.宽度为100-1000 nm量级的通道流动：在交变和行进磁场下，它们可以仅以中等（甚至反向）有效粘度实现显着的流速。 2.通过通道表面上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。3．相反的效果，即向粒子施加流体力，粒子的旋转运动将反过来将电流感应到纳米线圈中。4。机械纳米部件的制造可以通过使用高温下呈液态但在室温下呈固态的材料来完成。 因此，可以在高温下施加产生所需流动形状所需的磁场，然后冻结。 齿轮形状似乎是测试该技术的简单第一步。5。将测试非磁性流体或表面活性剂的使用，作为降低表面张力的方法，从而提高部件形状的细节质量。预计与 Ferrofluids Corporation 在实验/设计层面进行强有力的合作。

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.