CaltechAUTHORS
  A Caltech Library Service

Patterning electro-osmotic flow with patterned surface charge

Stroock, Abraham D. and Weck, Marcus and Chiu, Daniel T. and Huck, Wilhelm T. S. and Kenis, Paul J. A. and Ismagilov, Rustem F. and Whitesides, George M. (2000) Patterning electro-osmotic flow with patterned surface charge. Physical Review Letters, 84 (15). pp. 3314-3317. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:20130821-160733045

[img]
Preview
PDF - Published Version
See Usage Policy.

266Kb
[img]
Preview
PDF - Erratum
See Usage Policy.

41Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20130821-160733045

Abstract

This Letter reports the measurement of electro-osmotic flows (EOF) in microchannels with surface charge patterned on the 200 mu m scale. We have investigated two classes of patterns: (1) Those in which the surface charge varies along a direction perpendicular to the electric field used to drive the EOF; this type of pattern generates multidirectional flow along the direction of the field. (2) Those in which the surface charge pattern varies parallel to the field; this pattern generates recirculating cellular flew, and thus causes motion both parallel and perpendicular to the external field. Measurements of both of these flours agree well with theory in the Limit of thin double layers and low surface potential.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.84.3314DOIArticle
http://prl.aps.org/abstract/PRL/v84/i15/p3314_1PublisherArticle
http://dx.doi.org/10.1103/PhysRevLett.86.6050DOIErratum
http://prl.aps.org/abstract/PRL/v86/i26/p6050_1PublisherErratum
ORCID:
AuthorORCID
Ismagilov, Rustem F.0000-0002-3680-4399
Additional Information:© 2000 The American Physical Society. Received 2 November 1999; published in the issue dated 10 April 2000. We are grateful to Professor A. Ajdari (Ecole Supérieure de Physique et Chimie Industrielles de Paris) and Professor H. Stone (DEAS, Harvard University) for helpful discussions. This work was supported by DARPA: NSF ECS-9729405, NIH: GM51559, and NSF: DMR-9809363 MRSEC. A. D. S. was supported by NIH Molecular Biophysics Training Grant No. 5T32GM08313-10. M. W. was supported by the German Academic Exchange Service (DAAD). P. J. A. K. was supported by Netherlands Organization for Scientific Research (NWO).
Funders:
Funding AgencyGrant Number
DARPAUNSPECIFIED
NSFECS-9729405
NIHGM51559
NSFDMR-9809363
NIH5T32GM08313-10
German Academic Exchange Service (DAAD) UNSPECIFIED
Netherlands Organization for Scientific Research (NWO)UNSPECIFIED
Subject Keywords:elctroosmosis; particles
Record Number:CaltechAUTHORS:20130821-160733045
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130821-160733045
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40876
Collection:CaltechAUTHORS
Deposited By: Whitney Barlow
Deposited On:28 Aug 2013 22:25
Last Modified:30 Mar 2015 22:28

Repository Staff Only: item control page