Electrokinetic effects in catalytic platinum-insulator Janus swimmers
Electrokinetic effects in catalytic platinum-insulator Janus swimmers
复制标题
DOI：
10.1209/0295-5075/106/58003
复制
发表时间：
2014-06-01
期刊：
影响因子：
1.8
通讯作者：
Golestanian, R.
中科院分区：
文献类型：
--
作者：
Ebbens, S.;Gregory, D. A.;Golestanian, R.
实验研究了在过氧化氢溶液中添加盐对Janus铂-聚苯乙烯胶体推进性能的影响。研究发现，微摩尔量的硝酸钾和硝酸银对小鼠游泳速度的降低幅度相近，但对过氧化氢的总催化裂解速率影响明显不同。这一看似自相矛盾的实验观察结果可以用一个包含带电中间体和具有两个嵌套环的拓扑结构的广义反应方案从理论上解释。版权所有(C)Epla，2014
The effect of added salt on the propulsion of Janus platinum-polystyrene colloids in hydrogen peroxide solution is studied experimentally. It is found that micromolar quantities of potassium and silver nitrate salts reduce the swimming velocity by similar amounts, while leading to significantly different effects on the overall rate of catalytic breakdown of hydrogen peroxide. It is argued that the seemingly paradoxical experimental observations could be theoretically explained by using a generalised reaction scheme that involves charged intermediates and has the topology of two nested loops. Copyright (C) EPLA, 2014