Regulating the aggregation of colloidal particles in an electro-osmotic micropump.

  title={Regulating the aggregation of colloidal particles in an electro-osmotic micropump.},
  author={Zhu Zhang and Joost de Graaf and Sanli Faez},
  journal={Soft matter},
Unrestricted particle transport through microfluidic channels is of paramount importance to a wide range of applications, including lab-on-a-chip devices. In this article, we study via video microscopy the electro-osmotic aggregation of colloidal particles at the opening of a micrometer-sized silica channel in the presence of a salt gradient. Particle aggregation eventually leads to clogging of the channel, which may be undone by a time-adjusted reversal of the applied electric potential. We… Expand

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