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Paper-Based Flow Fractionation System Applicable to Preconcentration and Field-Flow Separation

Title
Paper-Based Flow Fractionation System Applicable to Preconcentration and Field-Flow Separation
Author
곽노균
Keywords
ZONE ELECTROPHORESIS; MICROFLUIDIC DEVICES; MEMBRANES; ASSAYS; IMBIBITION; DYNAMICS
Issue Date
2015-12
Publisher
AMER CHEMICAL SOC
Citation
ANALYTICAL CHEMISTRY, v. 88, NO 3, Page. 1682-1687
Abstract
We present a novel paper-based flow fractionation system for preconcentration and field-flow separation. In this passive fluidic device, a straight channel is divided into multiple daughter channels, each of which is connected with an expanded region. The hydrodynamic resistance of the straight channel is predominant compared with those of expanded regions, so we can create steady flows through the straight and daughter channels. While the expanded regions absorb a great amount of water via capillarity, the steady flow continues for 10 min without external pumping devices. By controlling the relative hydrodynamic resistances of the daughter channels, we successfully divide the flow with flow rate ratios of up to 30. Combining this bifurcation system with ion concentration polarization (ICP), we develop a continuous-flow preconcentrator on a paper platform, which can preconcentrate a fluorescent dye up to 33-fold. In addition, we construct a field-flow separation system to divide two different dyes depending on their electric polarities. Our flow fractionation systems on a paper-based platform would make a breakthrough for point-of-care diagnostics with specific functions including preconcentration and separation.
URI
http://pubs.acs.org/doi/abs/10.1021/acs.analchem.5b03682http://hdl.handle.net/20.500.11754/29428
ISSN
0003-2700; 1520-6882
DOI
10.1021/acs.analchem.5b03682
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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