论文标题
在空气磁液界面上的微型和毫米大小的颗粒的运动和捕获
Motion and trapping of micro- and millimeter-sized particles on the air-paramagnetic-liquid interface
论文作者
论文摘要
了解颗粒在空气界面上的运动可能会影响广泛的科学领域和应用。以前已知漂浮在空气流向液体界面上的磁磁颗粒具有磁铁的排斥运动。在这里，我们展示了一种运动机制，其中漂浮在空气磁性液体界面上的磁磁颗粒被吸引，并最终在距磁铁偏低的距离处被困。还已经研究了磁性颗粒的行为，并在统一的框架中对运动机制进行了理论，表明颗粒在空气 - 磁性 - 液体界面上的运动不仅受磁能的控制，而且是由磁性磁场的曲率相互作用，是由非均匀磁场产生的界面变形的曲率相互作用，由重力电位，以及磁性粒子和磁性粒子和磁性粒子和磁性粒子和磁性。有吸引力的运动机制已应用于定向的自组装和机器人粒子引导中。
Understanding the motion of particles on an air-liquid interface can impact a wide range of scientific fields and applications. Diamagnetic particles floating on an air-paramagnetic-liquid interface are previously known to have a repulsive motion from a magnet. Here, we show a motion mechanism where the diamagnetic particles floating on the air-paramagnetic-liquid interface are attracted and eventually trapped at an off-center distance from the magnet. The behavior of magnetic particles has been also studied and the motion mechanisms are theorized in a unified framework, revealing that the motion of particles on an air-paramagnetic-liquid interface is governed not only by magnetic energy, but as an interplay of the curvature of the interface deformation created by the nonuniform magnetic field, the gravitational potential, and the magnetic energy from the particle and the liquid. The attractive motion mechanism has been applied in directed self-assembly and robotic particle guiding.
