Bubble Driven Quasioscillatory Translational Motion of Catalytic Micromotors
Bubble Driven Quasioscillatory Translational Motion of Catalytic Micromotors
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DOI：
10.1103/physrevlett.109.128305
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发表时间：
2012-09-21
影响因子：
8.6
通讯作者：
Zhao, Y. -P.
中科院分区：
文献类型：
--
作者：
Manjare, Manoj;Yang, Bo;Zhao, Y. -P.
用高速CCD摄像机观察到了大尺寸Janus催化微马达的准振荡平动运动。发现这种运动行为与催化反应产生的气泡生长和破裂过程相一致，并且这两个过程的竞争产生净向前运动。已经提出了详细的物理模型来描述上述过程。有人建议，气泡的生长过程中施加的增长力向前移动的微电机，而爆裂过程中引起的瞬时局部压力凹陷拉微电机向后。理论预测与实验数据一致。
A new quasioscillatory translational motion has been observed for big Janus catalytic micromotors with a fast CCD camera. Such motional behavior is found to coincide with both the bubble growth and burst processes resulting from the catalytic reaction, and the competition of the two processes generates a net forward motion. Detailed physical models have been proposed to describe the above processes. It is suggested that the bubble growth process imposes a growth force moving the micromotor forward, while the burst process induces an instantaneous local pressure depression pulling the micromotor backward. The theoretic predictions are consistent with the experimental data.