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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buir.contributor.authorGuler, M. Tahsin
buir.contributor.orcidGüler, Mustafa Tahsin|0000-0002-0478-3183
dc.citation.epage268en_US
dc.citation.spage260en_US
dc.citation.volumeNumber73en_US
dc.contributor.authorGüler, Mustafa Tahsin
dc.date.accessioned2023-02-14T10:12:48Z
dc.date.available2023-02-14T10:12:48Z
dc.date.issued2021-11-23
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
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.en_US
dc.embargo.release2023-11-23
dc.identifier.doi10.1016/j.jmapro.2021.11.016en_US
dc.identifier.eissn2212-4616
dc.identifier.issn1526-6125
dc.identifier.urihttp://hdl.handle.net/11693/111249
dc.language.isoEnglishen_US
dc.publisherElsevier Ltden_US
dc.relation.isversionofhttps://doi.org/10.1016/j.jmapro.2021.11.016en_US
dc.source.titleJournal of Manufacturing Processesen_US
dc.subjectCO2 laser machiningen_US
dc.subjectMicrofluidic chipen_US
dc.subjectPlasma bondingen_US
dc.subjectViscoelastic focusingen_US
dc.subjectDroplet generationen_US
dc.titleFabricating plasma bonded microfluidic chips by CO2 laser machining of PDMS by the application of viscoelastic particle focusing and droplet generationen_US
dc.typeArticleen_US
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