ZnO/glass thin film surface acoustic waves for efficient digital acoustofluidics and active surface cleaning

Ong, Huiling, Pang, Huafeng, Zhou, Jian, Tao, Ran, Agrawal, Prashant, Torun, Hamdi, Thummavichai, Kunyapat, Luo, Jingting, Tao, Kai, Wu, Qiang, Chang, Honglong and Fu, Yong Qing (2022) ZnO/glass thin film surface acoustic waves for efficient digital acoustofluidics and active surface cleaning. Materials Chemistry and Physics, 287. ISSN 0254-0584

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Official URL: https://doi.org/10.1016/j.matchemphys.2022.126290

Abstract

Transparent microfluidic devices based on ZnO thin film/glass surface acoustic waves (SAWs) were explored for active surface cleaning based on its acoustofluidic performance. Acoustic waves generated from ZnO films on glass substrate were investigated and their acoustofluidic performance including transportation, jetting and nebulization were evaluated. Ash particles and starch solutions were used as model contaminants on the surface of the ZnO/glass SAW devices, and the mass loading of the contaminants on the device’s surface was monitored using the SAW device with a high sensitivity of 280.0 ± 9.0 Hz/(μg/mm2 ). Active surface cleaning of the contaminants was demonstrated based on the transportation of water droplets, and optimized SAW powers were identified which caused strong interactions between water droplet and contaminants, thus effectively cleaning the surfaces. Studies of surface heating effects induced by SAWs showed that the cleaning efficiency was also influenced by the substrate temperature induced by SAW agitations.

Item Type: Article
Additional Information: Funding information: This work was financially supported by the UK Engineering and Physical Sciences Research Council (EPSRC) under grant EP/P018998/1, Newton Mobility Grant (IE161019) through Royal Society, the National Natural Science Foundation of China (11504291,52075162, 12104320),Research Project in Fundamental and Application Fields of Guangdong Province (2020A1515110561),Shenzhen Science & Technology Project (RCBS20200714114918249), the Innovation Leading Program of New and High-tech Industry of Hunan Province (2020GK2015), the Natural Science Foundation of Hunan Province (2021JJ20018), and the Natural Science Foundation of Changsha (kq2007026).
Uncontrolled Keywords: SAW, glass, ZnO film, sensing, acoustofluidics, active cleaning
Subjects: F300 Physics
H100 General Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 17 May 2022 10:31
Last Modified: 07 Jun 2022 12:15
URI: http://nrl.northumbria.ac.uk/id/eprint/49139

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