A Review of SAW-Based Micro- and Nanoparticle Manipulation in Microfluidics

Area of Science:

• Microfluidics
• Acoustics
• Materials Science

Background:

• Surface acoustic wave (SAW) microfluidics enables precise manipulation of micro- and nanoparticles.
• Acoustofluidic devices offer label-free, low-energy, high-throughput particle manipulation.
• Applications include pumping, mixing, sorting, and separation.

Purpose of the Study:

• To review recent advancements in SAW-based microfluidic devices for particle manipulation.
• To explore device designs, materials, fabrication, channel properties, and operational modes.
• To identify trends, challenges, and future research opportunities.

Main Methods:

• Literature review of SAW-based microfluidic devices.
• Analysis of interdigitated transducer designs, materials, and fabrication.
• Investigation of microfluidic channel properties and SAW operational modes.

Main Results:

• Lithium niobate transducers are common for SAW actuators.
• Devices demonstrate accurate particle sorting across various sizes.
• Successful implementation in medical diagnostics and environmental monitoring.

Conclusions:

• SAW microfluidics is a powerful tool for micro/nanoparticle manipulation.
• Continued research can enhance sensitivity and expand applications.
• The technology holds significant potential for real-world applications.