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Updated: Apr 14, 2026
Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
Reconfigurable particle manipulation on micropillar-integrated silicon chips using a two-chip acoustofluidic platform
Yong Wang1, Haochen Wu2, Luoke Hu2
1Department of Mechanical Engineering, Hangzhou City University, Hangzhou 310015, China; Zhejiang Key Laboratory of Aerospace Metallic Materials, Hangzhou City University, Hangzhou 310015, China; State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China.
This study introduces a novel two-chip acoustofluidic platform for reconfigurable particle manipulation. The system uses micropillars to efficiently capture and arrange particles, simplifying complex acoustofluidic processes.
Area of Science:
- Acoustofluidics
- Microfluidics
- Biotechnology
Background:
- Reconfigurable acoustofluidic systems enable versatile particle manipulation but often involve complex fabrication and control.
- Conventional methods face challenges with high costs and system complexity.
Purpose of the Study:
- To develop a simplified, reconfigurable acoustofluidic platform for particle manipulation.
- To investigate the efficiency of particle capture and arrangement using micropillar arrays.
Main Methods:
- A two-chip platform utilizing a silicon chip with integrated micropillar arrays was designed.
- Acoustic waves were transmitted to induce oscillations and generate localized acoustic radiation forces for particle capture.
- Systematic investigation of micropillar dimensions, shape, arrangement, and particle size effects on capture efficiency.
Main Results:
- Particle capture efficiency is primarily determined by micropillar and particle dimensions, not micropillar shape.
- High-efficiency capture of 20-30 μm particles was achieved with micropillar diameters of 200-500 μm.
- Particle arrangement was dynamically reconfigured by adjusting micropillar layout.
Conclusions:
- The developed two-chip platform offers a simplified approach to reconfigurable acoustofluidic particle manipulation.
- The findings highlight the potential for cost-effective and flexible particle handling in microfluidic devices.
