Programming nanostructured soft biological surfaces by atomic layer deposition

Nanotechnology. 2013 Jun 21;24(24):245701. doi: 10.1088/0957-4484/24/24/245701. Epub 2013 May 16.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis / drug effects
  • Hydrophobic and Hydrophilic Interactions / drug effects
  • Lotus / drug effects
  • Nanostructures / chemistry*
  • Nanostructures / ultrastructure
  • Nanotechnology / methods*
  • Plant Leaves / drug effects
  • Plant Leaves / ultrastructure
  • Surface Properties / drug effects
  • Titanium / pharmacology

Substances

  • titanium dioxide
  • Titanium