Capillary kinetics of water in homogeneous, hydrophilic polymeric micro- To nanochannels

Hoon Eut Jeong; Pilnam Kim; Moon Kyoo Kwak; Chang Ho Seo; Kahp Y. Suh

doi:10.1002/smll.200600666

Capillary kinetics of water in homogeneous, hydrophilic polymeric micro- To nanochannels

Hoon Eut Jeong, Pilnam Kim, Moon Kyoo Kwak, Chang Ho Seo, Kahp Y. Suh

School of Mechanical Engineering

Seoul National University

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

The capillary kinetics of water inside homogenous PEG micro- to nanochannels formed by replica molding and UV-assisted bonding of a UV-curable PEG polymer is presented. The flow kinetics is measured and compared with that of heterogeneous PDMS channels supported on a glass substrate and having the same channel dimensions. Potential applications to pumpless, analytical tools are tested by flowing a water stream inside a complicated microfluidic network by spontaneous capillary action. The use of a fluorescent solution verified the presence of a concave curvature and complete filling inside the whole complicated PEG channel. The flow rate inside the PEG channel is sufficiently high even for nanochannels with a hydraulic radius of 190 nm. The PEG channel is useful for pumpless, high-speed analytical devices and for studying flow kinetics or dynamics in the micro/nanoscale regime.

Original language	English
Pages (from-to)	778-782
Number of pages	5
Journal	Small
Volume	3
Issue number	5
DOIs	https://doi.org/10.1002/smll.200600666
State	Published - May 2007

Keywords

Capillaries
Kinetics
Microfluidic channels
Polymers

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10.1002/smll.200600666

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abstract = "The capillary kinetics of water inside homogenous PEG micro- to nanochannels formed by replica molding and UV-assisted bonding of a UV-curable PEG polymer is presented. The flow kinetics is measured and compared with that of heterogeneous PDMS channels supported on a glass substrate and having the same channel dimensions. Potential applications to pumpless, analytical tools are tested by flowing a water stream inside a complicated microfluidic network by spontaneous capillary action. The use of a fluorescent solution verified the presence of a concave curvature and complete filling inside the whole complicated PEG channel. The flow rate inside the PEG channel is sufficiently high even for nanochannels with a hydraulic radius of 190 nm. The PEG channel is useful for pumpless, high-speed analytical devices and for studying flow kinetics or dynamics in the micro/nanoscale regime.",

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AU - Jeong, Hoon Eut

AU - Kim, Pilnam

AU - Kwak, Moon Kyoo

AU - Seo, Chang Ho

AU - Suh, Kahp Y.

PY - 2007/5

Y1 - 2007/5

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AB - The capillary kinetics of water inside homogenous PEG micro- to nanochannels formed by replica molding and UV-assisted bonding of a UV-curable PEG polymer is presented. The flow kinetics is measured and compared with that of heterogeneous PDMS channels supported on a glass substrate and having the same channel dimensions. Potential applications to pumpless, analytical tools are tested by flowing a water stream inside a complicated microfluidic network by spontaneous capillary action. The use of a fluorescent solution verified the presence of a concave curvature and complete filling inside the whole complicated PEG channel. The flow rate inside the PEG channel is sufficiently high even for nanochannels with a hydraulic radius of 190 nm. The PEG channel is useful for pumpless, high-speed analytical devices and for studying flow kinetics or dynamics in the micro/nanoscale regime.

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KW - Microfluidic channels

KW - Polymers

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Capillary kinetics of water in homogeneous, hydrophilic polymeric micro- To nanochannels

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Keywords

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