High-performance multiplex microvalves fabrication and using for tumor cells staining on a microfluidic chip.

Area of Science:

• Microfluidics
• Materials Science
• Biotechnology

Background:

• Microvalves are crucial for precise fluid control in microfluidic systems.
• Existing fabrication methods can be complex and expensive.

Purpose of the Study:

• To develop a simple, cost-effective, and high-performance method for fabricating multiplex microvalve chips.
• To demonstrate the utility of these microvalves in automated biological applications.

Main Methods:

• A sandwich structure was created by integrating a polydimethylsiloxane (PDMS) membrane between two glass slides.
• The design leveraged the elasticity of PDMS and the rigidity of glass for valve control.
• Computer-aided design facilitated automated operation of the microvalve chip.

Main Results:

• The fabricated microvalve chip demonstrated excellent control performance and multiplex integration capabilities.
• The system was successfully applied to automated tumor cell staining, improving efficiency.
• The method proved to be simple, cheap, and avoided complex silicon-based fabrication or soft lithography.

Conclusions:

• This novel fabrication method offers a new pathway for creating integrated multiplex microfluidic devices.
• The developed microvalve chip shows significant potential for automated biological sample processing and analysis.
• The approach enhances efficiency and reduces human error in cell identification processes.