title: Programming nanostructured soft biological surfaces by atomic layer deposition.
abstract: Here, we present the first successful attempt to programme the surface properties of nanostructured soft biological tissues by atomic layer deposition (ALD). The nanopatterned surface of lotus leaf was tuned by 3-125 nm TiO2 thin films. The lotus/TiO2 composites were studied by SEM-EDX, XPS, Raman, TG-DTA, XRR, water contact angle and photocatalysis measurements. While we could preserve the superhydrophobic feature of lotus, we managed to add a new property, i.e. photocatalytic activity. We also explored how surface passivation treatments and various ALD precursors affect the stability of the sensitive soft biological tissues. As we were able to gradually change the number of nanopatterns of lotus, we gained new insight into how the hollow organic nanotubes on the surface of lotus influence its superhydrophobic feature.
authors.affiliation: Department of Chemistry, University of Helsinki, Helsinki, Finland. imre.szilagyi@mail.bme.hu
authors.forename: Imre Miklós
authors.initials: IM
authors.lastname: Szilágyi
authors.forename: Georg
authors.initials: G
authors.lastname: Teucher
authors.forename: Emma
authors.initials: E
authors.lastname: Härkönen
authors.forename: Elina
authors.initials: E
authors.lastname: Färm
authors.forename: Timo
authors.initials: T
authors.lastname: Hatanpää
authors.forename: Timur
authors.initials: T
authors.lastname: Nikitin
authors.forename: Leonid
authors.initials: L
authors.lastname: Khriachtchev
authors.forename: Markku
authors.initials: M
authors.lastname: Räsänen
authors.forename: Mikko
authors.initials: M
authors.lastname: Ritala
authors.forename: Markku
authors.initials: M
authors.lastname: Leskelä
mesh_terms: D002384:Catalysis / Q000187:drug effects; D057927:Hydrophobic and Hydrophilic Interactions / Q000187:drug effects; D000070116:Lotus / Q000187:drug effects; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D018515:Plant Leaves / Q000187:drug effects / Q000648:ultrastructure; D013499:Surface Properties / Q000187:drug effects; D014025:Titanium / Q000494:pharmacology
chemical_list: C009495:titanium dioxide; D014025:Titanium