Micro-writing under water droplet using photo-switchable titanium oxide on nanocellulose coated micro-hoodoos

Sasha Hoshian (Corresponding author), Ville Jokinen, Klas Hjort, Robin H.A. Ras, Sami Franssila

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

In this work we develop fast and locally photo-switching transition between rolling state (Cassie-Baxter (CB)) and sticky state (Wenzel (W)) using photo-switchable titanium dioxide (TiO2) deposited by atomic layer deposition (ALD). It takes 1 min of UV exposure for switching from CB to W and 5 min of dark storage in oven (200°C) to recover the surface energy. We use crystal nanocellulose (CNC) on T-shaped micro-pillars (micro-hoodoos [1] Figure1-j) to make hierarchical structures. Photo-masked UV exposure causes the locally transition from CB to W.
Original languageEnglish
Title of host publication18th International Conference on Miniaturized Systems for Chemistry and Life Sciences
Pages117-119
Volume1
Publication statusPublished - 2014
MoE publication typeA4 Article in a conference publication
Event18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014 - San Antonio, United States
Duration: 26 Oct 201430 Oct 2014
Conference number: 18

Conference

Conference18th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2014
Abbreviated titleMicroTAS 2014
Country/TerritoryUnited States
CitySan Antonio
Period26/10/1430/10/14

Keywords

  • nanocellulose
  • photo-switching
  • superhydrophobic

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