An Alternative Micro-Milling Fabrication Process for Rapid and Low-Cost Microfluidics

Area of Science:

• Biomedical engineering
• Materials science
• Nanotechnology

Background:

• Microfluidics is crucial for biomedical applications.
• Advances in micro-milling enable cost-effective fabrication of complex microstructures.
• Existing fabrication methods have limitations in speed and complexity.

Purpose of the Study:

• To develop a rapid and cost-effective microfluidic chip fabrication process.
• To investigate the impact of surface roughness on microparticle control.
• To produce high-quality microfluidic devices for scientific research.

Main Methods:

• Utilized a step-by-step microfluidic chip fabrication process with a self-contained wet milling chamber.
• Employed ethanol solvent bonding for rapid assembly (approx. 1 hour).
• Analyzed microchannel surface roughness using quantitative contact profileometry and assessed particle velocity via image processing.

Main Results:

• Achieved high-quality microchannels comparable to existing studies.
• Demonstrated that surface roughness significantly affects microparticle control within the channels.
• Validated the rapid fabrication process for producing functional microfluidic devices.

Conclusions:

• The developed micro-milling and ethanol bonding technique offers a rapid and high-quality method for microfluidic device fabrication.
• Understanding surface roughness effects is key to optimizing microfluidic systems for particle manipulation.
• This advancement can accelerate research and development in diverse scientific fields utilizing microfluidics.