TY - JOUR
T1 - Multidirectionally Patterned Interdigital Transducers for Enhancing Acoustofluidic Streaming with Flexible Printed Circuit Board
AU - Stringer, Mercedes
AU - Dumčius, Povilas
AU - Zhang, Xiaoyan
AU - Chai, Yanyan
AU - Zeng, Ziming
AU - Dong, Zhiqiang
AU - Sun, Chao
AU - Liang, Dongfang
AU - Ge, Guangbo
AU - Fu, Yongqing
AU - Wu, Zhenlin
AU - Yang, Xin
PY - 2025/1/16
Y1 - 2025/1/16
N2 - Acoustic streaming generated by surface acoustic waves (SAWs) enables diverse acoustofluidic functions, such as fluid mixing, particle manipulation, and enhanced fluid transport, making SAWs valuable lab-on-a-chip systems. However, conventional SAW devices are often limited to a specific acoustofluidic function once fabricated. Each function typically requires different devices or designs to produce other wave modes, making exploration costly and time-consuming. A Multidirectional Interdigital Transducer (M-IDT) on a Flexible Printed Circuit Board (FPCB) is presented, allowing easy reconfigurability and multidirectional SAW propagation. This versatile device enables rapid, multifunctional experimentation on a single replaceable substrate, facilitating efficient exploration of acoustofluidic effects. This device, alongside finite element simulations, investigates substrate in-plane rotation angles (0°, 30°, 60°, and 90° relative to the X-axis) and wave modes. Favorable acoustic velocities are observed using Rayleigh SAW (R-SAW) at 0° and 30°, and using combined wave modes at 60°, and 90°. The pseudo shear-horizontal SAW (P-SH-SAW) at 90° exhibits higher velocities than R- SAW at 0°. P-SH-SAW also improved acoustic streaming at lower power, with high-viscosity fluids, substantial fluid volumes (1 mL), and within a 96-well plate. The M-IDTs reconfigurable nature allows rapid, cost-effective testing, making it ideal for prototyping a wide range of acoustofluidic applications.
AB - Acoustic streaming generated by surface acoustic waves (SAWs) enables diverse acoustofluidic functions, such as fluid mixing, particle manipulation, and enhanced fluid transport, making SAWs valuable lab-on-a-chip systems. However, conventional SAW devices are often limited to a specific acoustofluidic function once fabricated. Each function typically requires different devices or designs to produce other wave modes, making exploration costly and time-consuming. A Multidirectional Interdigital Transducer (M-IDT) on a Flexible Printed Circuit Board (FPCB) is presented, allowing easy reconfigurability and multidirectional SAW propagation. This versatile device enables rapid, multifunctional experimentation on a single replaceable substrate, facilitating efficient exploration of acoustofluidic effects. This device, alongside finite element simulations, investigates substrate in-plane rotation angles (0°, 30°, 60°, and 90° relative to the X-axis) and wave modes. Favorable acoustic velocities are observed using Rayleigh SAW (R-SAW) at 0° and 30°, and using combined wave modes at 60°, and 90°. The pseudo shear-horizontal SAW (P-SH-SAW) at 90° exhibits higher velocities than R- SAW at 0°. P-SH-SAW also improved acoustic streaming at lower power, with high-viscosity fluids, substantial fluid volumes (1 mL), and within a 96-well plate. The M-IDTs reconfigurable nature allows rapid, cost-effective testing, making it ideal for prototyping a wide range of acoustofluidic applications.
KW - acoustic streaming
KW - interdigital transducer
KW - multiple modes
KW - printed circuit board
KW - surface acoustic wave
UR - http://www.scopus.com/inward/record.url?scp=85215287290&partnerID=8YFLogxK
U2 - 10.1002/adfm.202421308
DO - 10.1002/adfm.202421308
M3 - Article
SN - 1616-301X
JO - Advanced Functional Materials
JF - Advanced Functional Materials
M1 - 2421308
ER -