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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.<\/jats:p>","DOI":"10.3390\/s22124344","type":"journal-article","created":{"date-parts":[[2022,6,13]],"date-time":"2022-06-13T02:01:44Z","timestamp":1655085704000},"page":"4344","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Flexible Platform of Acoustofluidics and Metamaterials with Decoupled Resonant Frequencies"],"prefix":"10.3390","volume":"22","author":[{"given":"Shahrzad","family":"Zahertar","sequence":"first","affiliation":[{"name":"Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK"},{"name":"Zepler Institute, University of Southampton, Southampton SO17 1BJ, UK"}]},{"given":"Hamdi","family":"Torun","sequence":"additional","affiliation":[{"name":"Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK"}]},{"given":"Chao","family":"Sun","sequence":"additional","affiliation":[{"name":"School of Life Sciences, Northwestern Polytechnical University, Xi\u2019an 710072, China"}]},{"given":"Christopher","family":"Markwell","sequence":"additional","affiliation":[{"name":"Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK"}]},{"given":"Yinhua","family":"Dong","sequence":"additional","affiliation":[{"name":"Department of Neurology, Tianjin 4th Centre Hospital Affiliated to Nankai University, Tianjin 300140, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8429-7598","authenticated-orcid":false,"given":"Xin","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Electrical and Electronic Engineering, School of Engineering, Cardiff University, Cardiff CF24 3AA, UK"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9797-4036","authenticated-orcid":false,"given":"Yongqing","family":"Fu","sequence":"additional","affiliation":[{"name":"Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"383","DOI":"10.1039\/D0MH00483A","article-title":"Material Innovation and Mechanics Design for Substrates and Encapsulation of Flexible Electronics: A Review","volume":"8","author":"Li","year":"2021","journal-title":"Mater. 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