Fabricating plasma bonded microfluidic chips by CO2 laser machining of PDMS by the application of viscoelastic particle focusing and droplet generation

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dc.authoridGULER, MUSTAFA/0000-0001-9108-8818
dc.contributor.authorGuler, M. Tahsin
dc.date.accessioned2025-01-21T16:41:08Z
dc.date.available2025-01-21T16:41:08Z
dc.date.issued2022
dc.departmentKırıkkale Üniversitesi
dc.description.abstractIn this study, direct CO2 laser machining of microchannels onto PDMS slabs and plasma bonding for sealing have been shown to provide the fastest method to fabricate PDMS microfluidic chips. Due to resolidification, the ashes and dust remains that cover the PDMS slab surface following this ablation process change the surface chemistry and prevent plasma bonding. Removing these remnants on the surface has been shown to be only possible via attaching and detaching a tape to the surface. The effect of laser frequency, speed and power settings has been investigated over the entire possible range with regards to channel geometry. The best laser settings were determined and the resulting output channels were examined under SEM and optical microscopes. PDMS spin coating after laser machining has been proposed as a pre-treatment process to improve the geometrical features of the channel. Water-in-oil droplet generation in the T-junction, as well as microparticle focusing in viscoelastic fluid - used to sample enrichment- have been shown as examples of applications that benefit from precise direct laser machined microchannels.
dc.description.sponsorshipKirikkale University BAP project [2021/024]
dc.description.sponsorshipThis study was financially supported by Kirikkale University BAP project no 2021/024. The author thanks to Prof. Caglar Elbuken for kind permission to use his laboratory; the author also thanks to Assist. Prof. Ismail Bilican for his help in SEM imaging. The author specially thanks to the great photograph artist Mete Ozbek, who passed away, for his help in arrangement of some figures.
dc.identifier.doi10.1016/j.jmapro.2021.11.016
dc.identifier.endpage268
dc.identifier.issn1526-6125
dc.identifier.issn2212-4616
dc.identifier.scopus2-s2.0-85119498775
dc.identifier.scopusqualityQ1
dc.identifier.startpage260
dc.identifier.urihttps://doi.org/10.1016/j.jmapro.2021.11.016
dc.identifier.urihttps://hdl.handle.net/20.500.12587/24812
dc.identifier.volume73
dc.identifier.wosWOS:000740769800004
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofJournal of Manufacturing Processes
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241229
dc.subjectCO2 laser machining; Microfluidic chip; Plasma bonding; Viscoelastic focusing; Droplet generation
dc.titleFabricating plasma bonded microfluidic chips by CO2 laser machining of PDMS by the application of viscoelastic particle focusing and droplet generation
dc.typeArticle

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