论文标题
Janus Micro-Swimmers的“火箭推进”
'Rocket propulsion' of Janus micro-swimmers
论文作者
论文摘要
我们报告了仅在一个极周围进行放热表面反应的球形Janus粒子的模拟。我们的模型不包括通过设计的自动运输。然而，净运动来自溶剂和胶体之间的直接动量转移，速度缩放为反应过程中释放的能量的平方根。我们发现，当胶体周围的流动的时间依赖性或溶剂可压缩性无法忽略时，这种推进是由系统的短时响应主导的。我们的模拟与以前的实验相当一致。
We report simulations of a spherical Janus particle undergoing exothermic surface reactions around one pole only. Our model excludes self-phoretic transport by design. Nevertheless, net motion occurs from direct momentum transfer between solvent and colloid, with speed scaling as the square root of the energy released during the reaction. We find that such propulsion is dominated by the system's short-time response, when neither the time dependence of the flow around the colloid nor the solvent compressibility can be ignored. Our simulations agree reasonably well with previous experiments.
