Planar fluidic channels on TiO2 nanoparticle coated paperboard

Dimitar Valtakari, Milena Stepien, Janne Haapanen, Hannu Teisala, Mikko Tuominen, Jurkka Kuusipalo, Jyrki M. Mäkelä, Martti Toivakka, Jarkko J. Saarinen

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)


    A new design for permanent, low-cost, and planar fluidic channels on TiO2 nanoparticle coated paperboard is demonstrated. Initially superhydrophobic TiO2 nanoparticle coatings can be converted to hydrophilic by ultraviolet (UVA) light, and fluidic channels can be generated. A simple water treatment after the UVA illumination converts the channels permanent when nanoparticles are removed from the illuminated and wetted areas as shown by water contact angle, FE-SEM, XPS, and ToF-SIMS analysis. This suggests new routes for inexpensive, easy to use point-of-care diagnostics based on planar fluidic channels.
    Original languageEnglish
    Pages (from-to)232-238
    Number of pages7
    JournalNordic Pulp and Paper Research Journal
    Issue number2
    Publication statusPublished - 2016
    Publication typeA1 Journal article-refereed


    • Wetting
    • TIO2
    • Nanoparticle
    • Fluidic channel
    • Liquid flame spray (LFS)
    • Paperboard

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    • Publication forum level 1


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