Flexible Platform of Acoustofluidics and Metamaterials with Decoupled Resonant Frequencies

Zahertar, Shahrzad, Torun, Hamdi, Sun, Chao, Markwell, Christopher, Dong, Yinhua, Yang, Xin and Fu, Yong Qing (2022) Flexible Platform of Acoustofluidics and Metamaterials with Decoupled Resonant Frequencies. Sensors, 22 (12). p. 4344. ISSN 1424-8220

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Official URL: https://doi.org/10.3390/s22124344


The key challenge for a lab-on-chip (LOC) device is the seamless integration of key elements of biosensing and actuation (e.g., biosampling or microfluidics), which are conventionally realised using different technologies. In this paper, we report a convenient and efficient LOC platform fabricated using an electrode patterned flexible printed circuit board (FPCB) pressed onto a piezoelectric film coated substrate, which can implement multiple functions of both acoustofluidics using surface acoustic waves (SAWs) and sensing functions using electromagnetic metamaterials, based on the same electrode on the FPCB. We explored the actuation capability of the integrated structure by pumping a sessile droplet using SAWs in the radio frequency range. We then investigated the hybrid sensing capability (including both physical and chemical ones) of the structure employing the concept of electromagnetic split-ring resonators (SRRs) in the microwave frequency range. The originality of this sensing work is based on the premise that the proposed structure contains three completely decoupled resonant frequencies for sensing applications and each resonance has been used as a separate physical or a chemical sensor. This feature compliments the acoustofluidic capability and is well-aligned with the goals set for a successful LOC device.

Item Type: Article
Additional Information: Funding information: This project received funding from the Engineering Physics and Science Research Council of UK (EPSRC EP/P018998/1) and the ATTRACT project funded by the EC under Grant Agreement 777222. and UK Fluidic Network (EP/N032861/1) Special Interest Group of Acoustofluidics, and EPSRC NetworkPlus in Digitalised Surface Manufacturing (EP/S036180/1).
Uncontrolled Keywords: electromagnetic metamaterials, acoustofluidics, surface acoustic waves, microfluidics, hybrid physical and chemical sensors, droplet actuation
Subjects: F200 Materials Science
F300 Physics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: John Coen
Date Deposited: 08 Jun 2022 11:00
Last Modified: 08 Jun 2022 11:00
URI: http://nrl.northumbria.ac.uk/id/eprint/49266

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