催化作用
介观物理学
扭矩
不对称
工作(物理)
旋转(数学)
材料科学
同种类的
溶剂
粘度
化学
物理
热力学
复合材料
凝聚态物理
计算机科学
有机化学
人工智能
量子力学
作者
Mingcheng Yang,Marisol Ripoll,Ke Chen
摘要
An asymmetric gear with homogeneous surface properties is, here, presented as a prototype to fabricate catalytic microrotors. The driving torque arises from the diffusiophoretic effect induced by the concentration gradients generated by catalytic chemical reactions at the gear surface. This torque produces a spontaneous and unidirectional rotation of the asymmetric gear. By means of mesoscopic simulations, we prove and characterize this scenario. The gear rotational velocity is determined by the gear-solvent interactions, the gear geometry, the solvent viscosity, and the catalytic reaction ratio. Our work presents a simple way to design self-propelled microrotors, alternative to existing catalytic bi-component, or thermophoretic ones.
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