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Acoustofluidic waveguides for fabrication of localized polymeric microstructure arrays

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Abstract

Polymer-based substrate with patterned microstructures has been widely utilized for the development of cell chip in tissue engineering and/or flexible sensors in robotics. The key challenge is to fabricate the polymer-based substrate with the localized patterned microstructures. In this study, we presented a method to fabricate localized microstructures by standing surface acoustic wave (SSAW) and user-defined waveguides. To investigate the working mechanism, we developed a 3D numerical model to analyze the induced acoustic pressure distribution and final generated microstructures. Results demonstrated that the utilized waveguide could localize the acoustic pressure field in a specified region within the prepared photosensitive fluid film based on Rayleigh’s radiation theory and capillary wave motion. By adjusting the SSAW driven modes and using different shaped waveguides, both numerical modeling and experimental tests showed that the localized microstructures can form on the liquid film and then successfully fabricated using ultraviolet (UV) solidification. Therefore, our developed method by using the SSAW and waveguide provides a promising alternative process to fabricate the polymer-based microstructure with localized patterns, and the fabricated polymer-based microstructures could be used for the development of flexible sensors, actuator, and/or soft robotics in future applications.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (U1809220), Zhejiang Provincial Funds for Distinguished Young Scientists of China (LR19E050001), Open Fund Project of Zhijiang Laboratory (2019MC0AB02), and the Fund for Creative Research Groups of National Natural Science Foundation of China (51821093).

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Authors and Affiliations

  1. State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027, China

    Yancheng Wang & Deqing Mei

  2. Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027, China

    Chenyang Han, Yancheng Wang & Deqing Mei

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  1. Chenyang Han
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  2. Yancheng Wang
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  3. Deqing Mei
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Correspondence to Yancheng Wang.

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Han, C., Wang, Y. & Mei, D. Acoustofluidic waveguides for fabrication of localized polymeric microstructure arrays. Appl. Phys. A 126, 651 (2020). https://doi.org/10.1007/s00339-020-03860-4

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