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

S. Hoshian (Corresponding author), V. Jokinen, K. Hjort, R.H.A. Ras, S. 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 publicationProceedings
Subtitle of host publication18th International Conference on Miniaturized Systems for Chemistry and Life Sciences
Pages117-119
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
CountryUnited States
CitySan Antonio
Period26/10/1430/10/14

Keywords

  • nanocellulose
  • photo-switching
  • superhydrophobic

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    Hoshian, S., Jokinen, V., Hjort, K., Ras, R. H. A., & Franssila, S. (2014). Micro-writing under water droplet using photo-switchable titanium oxide on nanocellulose coated micro-hoodoos. In Proceedings: 18th International Conference on Miniaturized Systems for Chemistry and Life Sciences (pp. 117-119) http://www.rsc.org/images/loc/2014/PDFs/Papers/038_0335.pdf