Planar fluidic channels on TiO2 nanoparticle coated paperboard

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Dimitar Valtakari, Milena Stepien, Janne Haapanen, Hannu Teisala, Mikko Tuominen, Jurkka Kuusipalo, Jyrki M. Mäkelä, Martti Toivakka, Jarkko J. Saarinen
Publication year: 2016
Journal: Nordic Pulp and Paper Research Journal
Volume number: 31
Issue number: 2
Start page: 232
End page: 238
eISSN: 2000-0669


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.


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

Last updated on 2019-20-10 at 02:43