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000188021 1001_ $$0P:(DE-Juel1)131052$$aYang, Mingcheng$$b0$$eCorresponding Author
000188021 245__ $$aCatalytic microrotor driven by geometrical asymmetry
000188021 260__ $$aMelville, NY$$bAmerican Institute of Physics$$c2015
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000188021 520__ $$aAn asymmetric gear with homogeneous surface properties is, here, presented as a prototype to fabricate catalytic microrotors. The driving torque arises from the diffusiophoretic effect induced by the concentration gradients generated by catalytic chemical reactions at the gear surface. This torque produces a spontaneous and unidirectional rotation of the asymmetric gear. By means of mesoscopic simulations, we prove and characterize this scenario. The gear rotational velocity is determined by the gear-solvent interactions, the gear geometry, the solvent viscosity, and the catalytic reaction ratio. Our work presents a simple way to design self-propelled microrotors, alternative to existing catalytic bi-component, or thermophoretic ones.
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000188021 7001_ $$0P:(DE-Juel1)130920$$aRipoll, Marisol$$b1$$ufzj
000188021 7001_ $$0P:(DE-HGF)0$$aChen, Ke$$b2
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