Electrokinetic effects in catalytic platinum-insulator Janus swimmers

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.

• Publication year

  2013

• Venue

  Europhysics Letters

• Publication date

  2013-12-21

• Fields of study

  Physics, Chemistry

• Identifiers
  DOI 10.1209/0295-5075/106/58003arXiv 1312.6250
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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