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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
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Three-dimensional integrated microfluidic architectures enabled through electrically switchable nanocapillary array

E N Gatimu1, T L King, J V Sweedler

  • 1Department of Chemical and Biomolecular Engineering and Department of Chemistry, University of Notre Dame, Notre Dame, Indiana 46556.

Biomicrofluidics
|August 21, 2009
PubMed
Summary
This summary is machine-generated.

Three-dimensional microfluidic devices utilize nanocapillary array membranes (NCAMs) for controlled fluidic layer interfacing. These NCAMs enable precise analyte transport and manipulation in complex hybrid architectures.

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Area of Science:

  • Microfluidics
  • Nanotechnology
  • Chemical Engineering

Background:

  • Extending microfluidic devices into three dimensions necessitates novel methods for fluidic layer interconnection.
  • Nanocapillary array membranes (NCAMs) offer a solution for creating hybrid 3D fluidic architectures.

Purpose of the Study:

  • To explore the use of externally controllable NCAMs for advanced 3D microfluidic systems.
  • To investigate the fundamental transport properties of nanocapillaries for chemical manipulations.

Main Methods:

  • Utilizing NCAMs to create hybrid 3D microfluidic architectures.
  • Controlling fluidic transfer via applied bias, surface charge, ionic strength, and nanopore impedance.
  • Investigating analyte transport dynamics at the nanoscale.

Main Results:

  • Achieved highly reproducible and tunable attoliter injections and sample preconcentration.
  • Demonstrated size-dependent transport and efficient molecular separations.
  • Observed two stable analyte transfer levels (reverse and forward bias).

Conclusions:

  • NCAMs are critical for enabling powerful, linked sequential chemical manipulations in 3D microfluidics.
  • Understanding single nanopore transport is key to optimizing these hybrid microfluidic systems.
  • These advancements facilitate precise control over fluid flow and analyte manipulation at the nanoscale.