Novel Pumping Methods for Microfluidic Devices: A Comprehensive Review.

Area of Science:

• Microfluidics
• Mechanical Engineering
• Automation

Background:

• Microfluidic systems enable precise control over fluid flow at the microscale.
• Accurate flow control is crucial for various applications, including lab-on-a-chip devices and chemical synthesis.
• Existing methods for microfluidic flow control present diverse strategies with varying degrees of precision and complexity.

Purpose of the Study:

• To review and categorize methods for achieving high-accuracy microfluidic flow control.
• To analyze the principles, advantages, and disadvantages of different flow control strategies.
• To highlight the advancements and future trends in autonomous and integrated microfluidic systems.

Main Methods:

• Categorization of microfluidic flow control systems into passive (non-mechanical) and active (mechanical) groups.
• Detailed examination of device fabrication and operational principles for each category.
• Review of system integration with computing platforms like smartphones and single-board computers.

Main Results:

• Passive systems offer simpler designs, while active systems provide superior precision and multitasking capabilities.
• Active mechanical systems are increasingly favored for their autonomous operation and suitability as "mini-laboratories".
• Integration with smartphones and single-board computers allows for autonomous data retrieval and processing, reducing reliance on personal computers.

Conclusions:

• Active mechanical systems represent a significant advancement in microfluidic flow control, offering high precision and autonomy.
• The integration of microfluidic systems with portable computing devices enhances their applicability in complex and remote environments.
• Future developments will likely focus on further enhancing autonomy, miniaturization, and integration capabilities for microfluidic technologies.