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Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles
Published on: March 13, 2016
Self-sealed vertical polymeric nanoporous-junctions for high-throughput nanofluidic applications.
1Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
Analytical Chemistry
|April 3, 2008
Summary
Researchers created a simple method to integrate nanoporous polymer junctions into poly(dimethylsiloxane) (PDMS) microfluidic devices for nanofluidics. This technique enables efficient protein preconcentration in microchannels without complex fabrication steps.
Area of Science:
- Materials Science
- Nanotechnology
- Microfluidics
Background:
- Microfluidic devices offer precise control over small fluid volumes.
- Integrating nanoporous materials into microfluidic channels is crucial for nanofluidic applications.
- Current integration methods often involve complex fabrication processes.
Purpose of the Study:
- To develop a simple and reliable method for integrating polymeric nanostructures into poly(dimethylsiloxane) (PDMS) microfluidic channels.
- To demonstrate the utility of these integrated devices for nanofluidic applications, specifically protein preconcentration.
Main Methods:
- A novel integration technique involving mechanical cutting and polymer solution infiltration was employed.
- Nafion polymer solution was infiltrated into gaps within PDMS microchannels.
- The inherent flexibility of PDMS allowed for self-sealing around the polymer junction without covalent bonding.
Main Results:
- A leak-free integration of a nanoporous Nafion polymer junction into PDMS microfluidic channels was achieved.
- The method demonstrated excellent repeatability and simplicity, avoiding photolithography or etching.
- Successful nanofluidic preconcentration of beta-phycoerythrin protein was demonstrated using the fabricated device.
- Preconcentration was effective even in large channels (1000 µm width x 100 µm depth) and under high-pressure fields.
Conclusions:
- The developed method provides an easy and robust way to create nanoporous junctions in PDMS microfluidic devices.
- This integration technique is suitable for various nanofluidic applications requiring precise molecular manipulation.
- The demonstrated protein preconcentration highlights the potential of these devices for analytical and diagnostic applications.
