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SU-8 free-standing microfluidic probes
Chalmers University of Technology, Karolinska Institutet.
Chalmers University of Technology.
Chalmers University of Technology.
Chalmers University of Technology.
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2017 (English)In: Biomicrofluidics, ISSN 1932-1058, E-ISSN 1932-1058, Vol. 11, no 1, article id 014112Article in journal (Refereed) Published
Abstract [en]

We present a process for fabrication of free-standing SU-8 probes, with a dry, mechanical release of the final micro-devices. The process utilizes the thermal release tape, a commonly used cleanroom material, for facile heat-release from the sacrificial layer. For characterization of the SU-8 microfluidic probes, two liquid interfaces were designed: a disposable interface with integrated wells and an interface with external liquid reservoirs. The versatility of the fabrication and the release procedures was illustrated by further developing the process to functionalize the SU-8 probes for impedance sensing, by integrating metal thin-film electrodes. An additional interface scheme which contains electronic components for impedance measurements was developed. We investigated the possibilities of introducing perforations in the SU-8 device by photolithography, for solution sampling predominantly by diffusion. The SU-8 processes described here allow for a convenient batch production of versatile free-standing microfluidic devices with well-defined tip-geometry.

Place, publisher, year, edition, pages
2017. Vol. 11, no 1, article id 014112
National Category
Engineering and Technology Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-359906DOI: 10.1063/1.4975026PubMedID: 28798844OAI: oai:DiVA.org:uu-359906DiVA, id: diva2:1246198
Available from: 2018-09-06 Created: 2018-09-06 Last updated: 2018-09-06

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Kim, Anna A

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