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Selective dip-coating of chemically micropatterned surfaces

Darhuber, Anton A. and Troian, Sandra M. and Davis, Jeffrey M. and Miller, Scott M. and Wagner, Sigurd (2000) Selective dip-coating of chemically micropatterned surfaces. Journal of Applied Physics, 88 (9). pp. 5119-5126. ISSN 0021-8979. http://resolver.caltech.edu/CaltechAUTHORS:DARjap00b

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Abstract

We characterize the selective deposition of liquid microstructures on chemically heterogeneous surfaces by means of dip coating processes. The maximum deposited film thickness depends critically on the speed of withdrawal as well as the pattern size, geometry, and angular orientation. For vertically oriented hydrophilic strips, we derive a hydrodynamic scaling relation for the deposited film thickness which agrees very well with interferometric measurements of dip-coated liquid lines. Due to the lateral confinement of the liquid, our scaling relation differs considerably from the classic Landau–Levich formula for chemically homogeneous surfaces. Dip coating is a simple method for creating large area arrays of liquid microstructures for applications involving chemical analysis and synthesis, biochemical assays, or wet printing of liquid polymer or ink patterns.


Item Type:Article
Additional Information:©2000 American Institute of Physics. (Received 11 May 2000; accepted 17 August 2000) This project is funded by the Electronic Technology Office of the Defense Advanced Research Projects Agency as part of the Molecular Level Printing Program. The authors also gratefully acknowledge the Austrian Fonds zur Förderung der wissenschaftlichen Forschung for a postdoctoral fellowship (AAD) and the Eastman Kodak Corporation for a graduate fellowship (SMM). Dr. N. Pittet and Dr. C. Monnereau assisted with the assembly of the dip-coating apparatus.
Subject Keywords:liquid phase deposition; liquid films; surface chemistry; chemical analysis; biological techniques; photolithography; optical microscopy; biochemistry
Record Number:CaltechAUTHORS:DARjap00b
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:DARjap00b
Alternative URL:http://dx.doi.org/10.1063/1.1317238
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4989
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:18 Sep 2006
Last Modified:26 Dec 2012 09:03

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