Electrothermal ac electro-osmosis Academic Article

abstract

• Two ac polarization mechanisms, charge accumulation due to electrode double layer charging and bulk permittivity/conductivity gradients generated by Joule heating, are combined in the double layer by introducing zwitterions to produce a new ac electrokinetic pump with the largest velocity (>1 mm/s) and flow penetration depth (100 m) reported for low-conductivity fluids. The large fluid velocity is due to a quartic scaling with respect to voltage, as is true of electrothermal flow, but exhibits a clear maximum at a frequency corresponding to the electrode double layer inverse RC time. 2009 American Institute of Physics.

authors

• Gagnon, Zachary

published proceedings

• Applied Physics Letters

author list (cited authors)

• Gagnon, Z. R., & Chang, H.

citation count

• 26

publication date

• January 2009

publisher

• AIP Publishing  Publisher

published in

• Applied Physics Letters  Journal

Digital Object Identifier (DOI)

• 10.1063/1.3020720

start page

• 024101

end page

• 024101

volume

• 94

issue

• 2

URL

• http://dx.doi.org/10.1063/1.3020720