Campus Units
Materials Science and Engineering
Document Type
Article
Publication Version
Published Version
Publication Date
1-2017
Journal or Book Title
Biomicrofluidics
Volume
11
Issue
1
First Page
014104
DOI
10.1063/1.4974013
Abstract
We report a simple, efficient, one-step, affordable method to produce open-channel paper-based microfluidic channels. One surface of a sheet of paper is selectively calendared, with concomitant hydrophobization, to create the microfluidic channel. Our method involves asymmetric mechanical modification of a paper surface using a rolling ball (ball-point pen) under a controlled amount of applied stress (σz) to ascertain that only one side is modified. A lubricating solvent (hexane) aids in the selective deformation. The lubricant also serves as a carrier for a perfluoroalkyl trichlorosilane allowing the channel to be made hydrophobic as it is formed. For brevity and clarity, we abbreviated this method as TACH (Targeted Asymmetric Calendaring and Hydrophobization). We demonstrate that TACH can be used to reliably produce channels of variable widths (size of the ball) and depths (number of passes), without affecting the nonworking surface of the paper. Using tomography, we demonstrate that these channels can vary from 10s to 100s of microns in diameter. The created hydrophobic barrier extends around the channel through wicking to ensure no leakages. We demonstrate, through modeling and fabrication, that flow properties of the resulting channels are analogous to conventional devices and are tunable based on associated dimensionless numbers.
Copyright Owner
The Authors
Copyright Date
2017
Language
en
File Format
application/pdf
Recommended Citation
Oyola-Reynoso, Stephanie; Frankiewicz, Christophe; Chang, Boyce; Chen, Jiahao; Bloch, J.-F.; and Thuo, Martin M., "Paper-based microfluidic devices by asymmetric calendaring" (2017). Materials Science and Engineering Publications. 226.
https://lib.dr.iastate.edu/mse_pubs/226
Comments
This article is published as Oyola-Reynoso, S., C. Frankiewicz, B. Chang, J. Chen, J-F. Bloch, and M. M. Thuo. "based microfluidic devices by asymmetric calendaring." Biomicrofluidics 11, no. 1 (2017): 014104, doi:10.1063/1.4974013. Posted with permission.