On-Chip Arbitrary Manipulation of Single Particles by Acoustic Resonator Array
1State Key Laboratory of Precision Measuring Technology and Instrument, College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China.
Analytical Chemistry
|March 23, 2022
Summary
This study introduces a gigahertz acoustic streaming tweezer (AST) platform for precise, arbitrary single-particle manipulation. This microrobot-like technology enables controllable fluid flow for diverse micro-manipulation tasks.
Area of Science:
- Physics
- Engineering
- Materials Science
Background:
- Acoustic tweezers offer biocompatible, precise particle manipulation but lack arbitrary control.
- Effective manipulation of microparticles in liquids is crucial for various scientific applications.
Purpose of the Study:
- To develop a gigahertz (GHz) bulk acoustic streaming tweezer (AST)-based micro-manipulation platform.
- To achieve precise, arbitrary, and universal single-particle manipulation using controllable acoustic streaming flow.
Main Methods:
- Translating acoustic energy into fluid kinetic energy to create controllable flow fields.
- Utilizing radio frequency signals to adjust acoustic streaming intensity and direction.
- Employing acoustic streaming drag force (ASF) for particle movement.
Main Results:
- Demonstrated arbitrary and stable manipulation of single SiO2 particles.
- Achieved precise linear, U-shaped motions, and complex tasks like playing billiards and maze exploration.
- Showcased a controllable, quick-response, and stable flow field for micro-manipulation.
Conclusions:
- The GHz AST platform enables microrobot-like particle manipulation with high precision and arbitrariness.
- This technology holds significant potential for applications in particle separation, assembly, sensing, and transport.
- The ability to arbitrarily control particle movement opens new avenues in microfluidics and nanotechnology.
