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On-Demand Inkjet Printed Hydrophilic Coatings for Flow Control in 3D-Printed Microfluidic Devices Embedded with Organic Electrochemical Transistors
RISE Research Institutes of Sweden, Digital Systems, Smart Hardware. Linköping University, Sweden.
Leitat Technological Center, Spain; Technical University of Catalonia, Spain.
RISE Research Institutes of Sweden, Digital Systems, Smart Hardware.ORCID iD: 0000-0001-6889-0351
Technical University of Catalonia, Spain.
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2023 (English)In: Advanced Materials Technologies, E-ISSN 2365-709XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

Microfluidic surface chemistry can enable control of capillary-driven flow without the need for bulky external instrumentation. A novel pondered nonhomogeneous coating defines regions with different wetting properties on the microchannel walls. It changes the curvature of the liquid–air meniscus at various channel cross-sections and consequently leads to different capillary pressures, which is favorable in the strive toward automatic flow control. This is accomplished by the deposition of hydrophilic coatings on the surface of multilevel 3D-printed (3DP) microfluidic devices via inkjet printing, thereby retaining the surface hydrophilicity for at least 6 months of storage. To the best of our knowledge, this is the first demonstration of capillary flow control in 3DP microfluidics enabled by inkjet printing. The method is used to create “stop” and “delay” valves to enable preprogrammed capillary flow for sequential release of fluids. To demonstrate further utilization in point-of-care sensing applications, screen printed organic electrochemical transistors are integrated within the microfluidic chips to sense, sequentially and independently from external actions, chloride anions in the (1–100) × 10−3 m range. The results present a cost-effective fabrication method of compact, yet comprehensive, all-printed sensing platforms that allow fast ion detection (<60 s), including the capability of automatic delivery of multiple test solutions. © 2023 The Authors. 

Place, publisher, year, edition, pages
John Wiley and Sons Inc , 2023.
Keywords [en]
3D-printing, capillary-driven microfluidics, hydrophilic coating, inkjet printing, OECT, 3D printing, Capillarity, Capillary flow, Chlorine compounds, Coatings, Cost effectiveness, Flow control, Hydrophilicity, Ink jet printing, Microfluidic chips, Wetting, 3-D printing, Capillary-driven microfluidic, Hydrophilic coatings, Ink jet, Ink-jet printing, Microfluidics devices, On demands, Organic electrochemical transistors, Microfluidics
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:ri:diva-65671DOI: 10.1002/admt.202300127Scopus ID: 2-s2.0-85163768709OAI: oai:DiVA.org:ri-65671DiVA, id: diva2:1786894
Note

Correspondence Address: P. Andersson Ersman; RISE Research Institutes of Sweden, Digital Systems, Smart Hardware, Printed, Bio- and Organic Electronics, Norrköping, 60233, Sweden.  

This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska‐Curie grant agreement no. 813863 (BORGES).

 

Available from: 2023-08-10 Created: 2023-08-10 Last updated: 2023-08-28Bibliographically approved

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Beni, ValerioAndersson Ersman, Peter

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