Direct Observation of the Direction of Motion for Spherical Catalytic Swimmers
Direct Observation of the Direction of Motion for Spherical Catalytic Swimmers
复制标题
DOI：
10.1021/la2033127
复制
发表时间：
2011-10-18
期刊：
影响因子：
3.9
通讯作者：
Howse, Jonathan R.
中科院分区：
文献类型：
--
作者：
Ebbens, Stephen J.;Howse, Jonathan R.
通过在荧光聚合物珠上涂上铂半球制成的非导电Janus粒子游泳器已经用视频显微镜进行了充分的表征，揭示了它们在过氧化氢燃料中远离催化铂贴片进行推进。铂涂层遮蔽了每个游泳者一半的荧光信号，从而可以直接观察到方向，并与由此产生的游泳方向定量相关。观察到的游泳者方向与气泡释放和扩散泳推进机制一致。
Nonconductive Janus particle swimmers made by coating fluorescent polymer beads with hemispheres of platinum have been fully characterized using video microscopy to reveal that they undergo propulsion in hydrogen peroxide fuel away from the catalytic platinum patch. The platinum coating shadows the fluorescence signal from half of each swimmer to allow the orientation to be observed directly and correlated quantitatively with the resulting swimming direction. The observed swimmer direction is consistent with both the bubble release and diffusiophoretic propulsion mechanisms.