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 Saarinen

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

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 languageUndefined/Unknown
Pages (from-to)232–238
JournalNordic Pulp and Paper Research Journal
Volume31
Issue number2
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • Wetting
  • TiO2
  • Nanoparticle
  • Paperboard
  • Liquid Flame Spray
  • Paper-based Microfluidics

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