TY - JOUR
T1 - Electroosmotic Flow Dipole
T2 - Experimental Observation and Flow Field Patterning
AU - Paratore, Federico
AU - Boiko, Evgeniy
AU - Kaigala, Govind V.
AU - Bercovici, Moran
N1 - Publisher Copyright: © 2019 American Physical Society.
PY - 2019/6/7
Y1 - 2019/6/7
N2 - We experimentally demonstrate the phenomenon of electroosmotic dipole flow that occurs around a localized surface charge region under the application of an external electric field in a Hele-Shaw cell. We use localized deposition of polyelectrolytes to create well-controlled surface charge variations, and show that, for a disk-shaped spot, the internal pressure distribution that arises results in uniform flow within the spot and dipole flow around it. We further demonstrate the superposition of surface charge spots to create complex flow patterns, without the use of physical walls.
AB - We experimentally demonstrate the phenomenon of electroosmotic dipole flow that occurs around a localized surface charge region under the application of an external electric field in a Hele-Shaw cell. We use localized deposition of polyelectrolytes to create well-controlled surface charge variations, and show that, for a disk-shaped spot, the internal pressure distribution that arises results in uniform flow within the spot and dipole flow around it. We further demonstrate the superposition of surface charge spots to create complex flow patterns, without the use of physical walls.
UR - http://www.scopus.com/inward/record.url?scp=85066942185&partnerID=8YFLogxK
U2 - https://doi.org/10.1103/PhysRevLett.122.224502
DO - https://doi.org/10.1103/PhysRevLett.122.224502
M3 - مقالة
SN - 0031-9007
VL - 122
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
M1 - 224502
ER -