Fabrication of suspended electrokinetic microchannels from directly written sacrificial polymer fibers

Scott M. Berry; Thomas J. Roussel; Scott D. Cambron; Robert W. Cohn; Robert S. Keynton

doi:10.1007/s10404-012-0973-z

Fabrication of suspended electrokinetic microchannels from directly written sacrificial polymer fibers

Scott M. Berry, Thomas J. Roussel, Scott D. Cambron, Robert W. Cohn, Robert S. Keynton

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

7 Scopus citations

Abstract

Freely suspended microchannels with diameters ranging from4 to 100 lmwere fabricated by utilizing directly written PMMA fibers as sacrificial structures. These precisely oriented fibers served as scaffolds aroundwhich thin cylinders of glass were deposited (via sputtering), followed by a conformal coating of Parylene to augment the mechanical integrity of the structures. After coating, the PMMA fibers were dissolved to yield suspended, hollow conduits that were hydrophilic and robust. The freely suspended channels were loaded with a buffer solution containing charged particles, which were subsequently electrokinetically manipulated and velocities quantified using microparticle image velocimetry (μPIV). Mobilities within 1.3 % of those observed in conventional, planar microchannels were recorded.

Original language	English
Pages (from-to)	451-459
Number of pages	9
Journal	Microfluidics and Nanofluidics
Volume	13
Issue number	3
DOIs	https://doi.org/10.1007/s10404-012-0973-z
State	Published - Sep 2012

Bibliographical note

Funding Information:
Acknowledgments This investigation was funded by the National Science Foundation NIRT Program (ECCS-0506941) and NSF PFI Program (EEC-0438604).

Funding

Acknowledgments This investigation was funded by the National Science Foundation NIRT Program (ECCS-0506941) and NSF PFI Program (EEC-0438604).

Funders	Funder number
National Science Foundation (NSF)	EEC-0438604, ECCS-0506941

Keywords

Direct write
Electroosmotic flow
Fabrication
Microchannels
Suspended

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Materials Chemistry

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10.1007/s10404-012-0973-z

Cite this

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title = "Fabrication of suspended electrokinetic microchannels from directly written sacrificial polymer fibers",

abstract = "Freely suspended microchannels with diameters ranging from4 to 100 lmwere fabricated by utilizing directly written PMMA fibers as sacrificial structures. These precisely oriented fibers served as scaffolds aroundwhich thin cylinders of glass were deposited (via sputtering), followed by a conformal coating of Parylene to augment the mechanical integrity of the structures. After coating, the PMMA fibers were dissolved to yield suspended, hollow conduits that were hydrophilic and robust. The freely suspended channels were loaded with a buffer solution containing charged particles, which were subsequently electrokinetically manipulated and velocities quantified using microparticle image velocimetry (μPIV). Mobilities within 1.3 % of those observed in conventional, planar microchannels were recorded.",

keywords = "Direct write, Electroosmotic flow, Fabrication, Microchannels, Suspended",

author = "Berry, {Scott M.} and Roussel, {Thomas J.} and Cambron, {Scott D.} and Cohn, {Robert W.} and Keynton, {Robert S.}",

note = "Funding Information: Acknowledgments This investigation was funded by the National Science Foundation NIRT Program (ECCS-0506941) and NSF PFI Program (EEC-0438604).",

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AU - Berry, Scott M.

AU - Roussel, Thomas J.

AU - Cambron, Scott D.

AU - Cohn, Robert W.

AU - Keynton, Robert S.

N1 - Funding Information: Acknowledgments This investigation was funded by the National Science Foundation NIRT Program (ECCS-0506941) and NSF PFI Program (EEC-0438604).

PY - 2012/9

Y1 - 2012/9

N2 - Freely suspended microchannels with diameters ranging from4 to 100 lmwere fabricated by utilizing directly written PMMA fibers as sacrificial structures. These precisely oriented fibers served as scaffolds aroundwhich thin cylinders of glass were deposited (via sputtering), followed by a conformal coating of Parylene to augment the mechanical integrity of the structures. After coating, the PMMA fibers were dissolved to yield suspended, hollow conduits that were hydrophilic and robust. The freely suspended channels were loaded with a buffer solution containing charged particles, which were subsequently electrokinetically manipulated and velocities quantified using microparticle image velocimetry (μPIV). Mobilities within 1.3 % of those observed in conventional, planar microchannels were recorded.

AB - Freely suspended microchannels with diameters ranging from4 to 100 lmwere fabricated by utilizing directly written PMMA fibers as sacrificial structures. These precisely oriented fibers served as scaffolds aroundwhich thin cylinders of glass were deposited (via sputtering), followed by a conformal coating of Parylene to augment the mechanical integrity of the structures. After coating, the PMMA fibers were dissolved to yield suspended, hollow conduits that were hydrophilic and robust. The freely suspended channels were loaded with a buffer solution containing charged particles, which were subsequently electrokinetically manipulated and velocities quantified using microparticle image velocimetry (μPIV). Mobilities within 1.3 % of those observed in conventional, planar microchannels were recorded.

KW - Direct write

KW - Electroosmotic flow

KW - Fabrication

KW - Microchannels

KW - Suspended

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Fabrication of suspended electrokinetic microchannels from directly written sacrificial polymer fibers

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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