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Roll-to-roll production of a microfluidic platform and its functionalization by means of digital printing technologies for gas and fluid sensors (Conference Presentation)
Author(s): Carsten Eschenbaum; Anne Habermehl; Robert Huber; Uli Lemmer; Noah Strobel; Adrian Mertens; Gerardo Hernandez-Sosa
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Paper Abstract

The individualized functionalization of mass-produced microstructures is still challenging for the process technology. Here, a rroll-to-roll based process hot embossing is presented for the production of microfluidic structures by means of hot embossing is presented. The resulting microfluidic channels are functionalized modified with different materials. Thereby, digital printing technologies such as aAerosoljet or inkjet are used. This approach allows for mass production of microfluidic channels and their the individualized individual functionalizationfunctionalization of mass produced microfluidic channels. The encapsulation of the channels also takes placeis realized in an R2R-based thermal bonding process without adding any solvent or adhesive. Taking account ofUsing this approach, several sensor systems for gas and / or fluid detection could be demonstrated. Surface -eEnhanced Raman Scattering scattering (SERS) with amplification enhancement factors of up to 107 [1] is demonstrated by printing gold nanoparticles into the microfluidic channel. We evaluate the printed SERS structures using solutions of rhodamine 6G and adenosine as exemplary analytes. Furthermore, these channels could be functionalized with different fluorescent organic semiconductors. Their fluorescence intensity is quenched in the presence of a nitroaromatic compounds. By using different materials simultaneously, we are able to measure a fingerprint like pattern of different analytes, which we evaluated by means ofusing pattern recognition algorithms. This method can be used both in the gas phase (electronic nose) and in fluids (electronic tongue) for the detection of nitroaromatic compounds [2,3]. With the opto-electronic nose, we were able to reach detections limits below 1ppb. [1] A. Habermehl et al, Sensors 17, 2401 (2017). [2] N. Bolse et al, Flexible and Printed Electronics 2, 024001 (2017) [3] N. Bolse et al, ACS Omega 2 (10), 6500-6505 (2017)

Paper Details

Date Published: 18 September 2018
Proc. SPIE 10738, Organic and Hybrid Sensors and Bioelectronics XI, 107380M (18 September 2018); doi: 10.1117/12.2321306
Show Author Affiliations
Carsten Eschenbaum, Karlsruher Institut für Technologie (Germany)
Anne Habermehl, Karlsruher Institut für Technologie (Germany)
Robert Huber, Karlsruher Institut für Technologie (Germany)
Uli Lemmer, Karlsruher Institut für Technologie (Germany)
Noah Strobel, Karlsruher Institut für Technologie (Germany)
Adrian Mertens, Karlsruher Institut für Technologie (Germany)
Gerardo Hernandez-Sosa, Karlsruher Institut für Technologie (Germany)

Published in SPIE Proceedings Vol. 10738:
Organic and Hybrid Sensors and Bioelectronics XI
Ioannis Kymissis; Ruth Shinar; Luisa Torsi; Emil J. W. List-Kratochvil, Editor(s)

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