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Renaud Dufour, Philippe Brunet, Maxime Harnois, Rabah Boukherroub, Vincent Thomy and Vincent Senez Zipping Effect on Omniphobic Surfaces for Controlled Deposition of Minute Amounts of Fluid or Colloids Small 8

Version of Record online: 16 FEB 2012 | DOI: 10.1002/smll.201101895

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Controlled deposition of picoliter-sized volumes is achieved using the receding motion of droplets on microstructured super-omniphobic surfaces. Zipping phenomena occurring along the receding contact-line rules the volume of these deposits. Beyond self-cleaning effects, this mechanism opens new perspectives for liquid-repellent surfaces, enabling passive, accurate, and targeted delivery of picoliter-sized samples for chemical or biological assays.

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