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Mechanical and chemical stability of injection-molded microcantilevers used for sensing

Authors

  • Prabitha Urwyler,

    1. Paul Scherrer Institut, Laboratory for Micro- and Nanotechnology, 5232 Villigen PSI, Switzerland
    2. University of Basel, Biomaterials Science Center, c/o University Hospital, 4031 Basel, Switzerland
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  • Alfons Pascual,

    1. University of Applied Sciences and Arts Northwestern Switzerland FHNW, Institute of Polymer Engineering, 5210 Windisch, Switzerland
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  • Per Magnus Kristiansen,

    1. University of Applied Sciences and Arts Northwestern Switzerland FHNW, Institute of Polymer Engineering, 5210 Windisch, Switzerland
    2. University of Applied Sciences and Arts Northwestern Switzerland FHNW, Institute of Polymer Nanotechnology, 5210 Windisch, Switzerland
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  • Jens Gobrecht,

    1. Paul Scherrer Institut, Laboratory for Micro- and Nanotechnology, 5232 Villigen PSI, Switzerland
    2. University of Applied Sciences and Arts Northwestern Switzerland FHNW, Institute of Polymer Nanotechnology, 5210 Windisch, Switzerland
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  • Bert Müller,

    1. University of Basel, Biomaterials Science Center, c/o University Hospital, 4031 Basel, Switzerland
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  • Helmut Schift

    Corresponding author
    1. Paul Scherrer Institut, Laboratory for Micro- and Nanotechnology, 5232 Villigen PSI, Switzerland
    2. University of Applied Sciences and Arts Northwestern Switzerland FHNW, Institute of Polymer Nanotechnology, 5210 Windisch, Switzerland
    • Paul Scherrer Institut, Laboratory for Micro- and Nanotechnology, 5232 Villigen PSI, Switzerland
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Abstract

Ultraviolet-ozone treatment is used as a standard surface cleaning procedure for removal of molecular organic contamination from analytical and sensing devices. Here, it is applied for injection-molded polymer microcantilevers before characterization and sensing experiments. This article examines the effects of the surface cleaning process using commercial equipment, in particular on the performance and mechanical properties of the cantilevers. It can be shown that the first chemical aging process essentially consist of the cross linking of the polymer chains together with a physical aging of the material. For longer exposure, the expected thermo-oxidative formation of carbonyl groups sets in and an exposure dependent chemical degradation can be detected. A process time of 20 min was found suitable as a trade-off between cleaning and stability. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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