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As flexible electronics, biomedical applications, and micro-robotics continue to advance rapidly, achieving precise torque generation and controlled assembly at the microscale has emerged as a focal point of scientific inquiry. Recently, a research team from the Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, in collaboration with international partners, unveiled a groundbreaking discovery. They identified a novel capillary ratchet mechanism, triggered by interfacial flow dynamics, that effectively transforms straightforward vertical motion into consistent unidirectional rotation of an interfacial floating object. This innovative mechanism has been successfully employed in the hierarchical twisting and assembly of microfibers, opening up new avenues for microscale assembly techniques.
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