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Planar thin film device for capillary electrophoresis
B A Peeni1, D B Conkey, J P Barber
1Department of Electrical and Computer Engineering, Brigham Young University, Provo, UT 84602, USA.
Lab on a Chip
|April 28, 2005
Summary
Researchers developed hollow tubular microfluidic channels using a novel bottom-up fabrication method. This technique enables precise control over channel dimensions for applications in micro-total analysis systems.
Area of Science:
- Materials Science
- Chemical Engineering
- Analytical Chemistry
Background:
- Microfluidic devices are crucial for miniaturized analytical systems.
- Developing precise and complex microchannel structures remains a challenge.
Purpose of the Study:
- To present a novel bottom-up fabrication method for hollow tubular microfluidic channels on quartz substrates.
- To demonstrate the utility of these channels for rapid separation of biomolecules.
Main Methods:
- Fabrication involved patterning a photoresist/aluminum sacrificial layer.
- Deposition of silicon dioxide (SiO2) followed by sacrificial layer removal using chemical etchants (HCl/HNO3 and Nano-Strip).
- Utilized planar micromachining techniques.
Main Results:
- Successfully fabricated hollow tubular microfluidic channels with controlled geometry.
- Demonstrated rapid separation of fluorescently labeled amino acids using the fabricated device.
- The process offers unique control over channel composition and dimensions.
Conclusions:
- The presented fabrication method allows for precise construction of microfluidic channels.
- This technique is promising for the development of advanced micro-total analysis systems (µTAS).
- Future work will focus on integrating analytical capabilities into these complex devices.