Recent developments in PDMS surface modification for microfluidic devices

Jinwen Zhou, Amanda Ellis, Nicolas Voelcker

    Research output: Contribution to journalArticlepeer-review

    538 Citations (Scopus)

    Abstract

    PDMS is enjoying continued and ever increasing popularity as the material of choice for microfluidic devices due to its low cost, ease of fabrication, oxygen permeability and optical transparency. However, PDMS's hydrophobicity and fast hydrophobic recovery after surface hydrophilization, attributed to its low glass transition temperature of less than -120°C, negatively impacts on the performance of PDMS-based microfluidic device components. This issue has spawned a flurry of research to devise longer lasting surface modifications of PDMS, with particular emphasis on microfluidic applications. This review will present recent research on surface modifications of PDMS using techniques ranging from metal layer coatings and layer-by-layer depositions to dynamic surfactant treatments and the adsorption of amphipathic proteins. We will also discuss significant advances that have been made with a broad palette of gas-phase processing methods including plasma processing, sol-gel coatings and chemical vapor deposition. Finally, we will present examples of applications and future prospects of modified PDMS surfaces in microfluidics, in areas such as molecular separations, cell culture in microchannels and biomolecular detection via immunoassays.

    Original languageEnglish
    Pages (from-to)2-16
    Number of pages15
    JournalElectrophoresis
    Volume31
    Issue number1
    DOIs
    Publication statusPublished - Jan 2010

    Keywords

    • Lab-on-a-chip
    • Microfluidic devices
    • Molecular separation
    • PDMS
    • Surface modification

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