自组装颗粒行走器
Self-assembled granular walkers
摘要：
微观系统中的运动机制不仅对于技术应用具有极大的兴趣，而且对于理解和潜在地利用远离热平衡的过程也具有极大的兴趣。缩小尺度是一个特别的挑战，并导致了一些有趣的概念，包括热棘轮系统和不对称游泳者。在这里，我们提出了一个特别有趣的系统，因为它是自组装的，并使用了一个强大的机制，可以在各种设置中实现。它由不同大小的小球组成，这些小球相互粘附，并受到振荡（零平均）外力场的作用。相互作用力网络中固有的非线性导致力的限制，从而导致运动。我们提出了一个模型，占所观察到的行为，并证明了广泛的适用性和潜在的可扩展性的概念。
英文摘要：
Mechanisms of locomotion in microscopic systems are of great interest not only for technological applications, but also for the sake of understanding, and potentially harnessing, processes far from thermal equilibrium. Down-scaling is a particular challenge, and has led to a number of interesting concepts including thermal ratchet systems and asymmetric swimmers. Here we present a system which is particularly intriguing, as it is self-assembling and uses a robust mechanism which can be implemented in various settings. It consists of small spheres of different size which adhere to each other, and are subject to an oscillating (zero average) external force eld. An inherent nonlinearity in the mutual force network leads to force rectication and hence to locomotion. We present a model that accounts for the observed behaviour and demonstrates the wide applicability and potential scalability of the concept.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
