论文标题
校正含有活性颗粒的密闭软囊泡
Rectification of Confined Soft Vesicles Containing Active Particles
论文作者
论文摘要
主动系统最有希望的特征之一是，它们可以从环境中提取能量并将其转换为机械工作。与刚性边界接触时，自驱动的颗粒可以纠正。当局限于非对称通道和微胶质的运动时，他们可以纠正自己的运动。在本文中，我们研究了含有活性布朗颗粒的二维柔性囊泡的形状波动。我们展示了这些波动不仅能够轻松地通过狭窄的开口轻松挤压囊泡，而且在将其放置在不对称的限制通道内（Ratchetaxis）时也是造成其整流的原因。我们详细介绍了可以优化此过程的条件，并分解弹性和主动力之间的复杂相互作用。
One of the most promising features of active systems is that they can extract energy from their environment and convert it to mechanical work. Self propelled particles enable rectification when in contact with rigid boundaries. They can rectify their own motion when confined in asymmetric channels and that of microgears. In this paper, we study the shape fluctuations of two dimensional flexible vesicles containing active Brownian particles. We show how these fluctuations not only are capable of easily squeezing a vesicle through narrow openings, but are also responsible for its rectification when placed within asymmetric confining channels (ratchetaxis). We detail the conditions under which this process can be optimized, and sort out the complex interplay between elastic and active forces responsible for the directed motion of the vesicle across these channels.
