Programming nanostructured soft biological surfaces by atomic layer deposition
| Autor: | Timo Hatanpää, Leonid Khriachtchev, Markku Leskelä, Mikko Ritala, Elina Färm, Timur Nikitin, Georg Teucher, Emma Härkönen, Markku Räsänen, Imre Miklós Szilágyi |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Passivation Surface Properties Bioengineering Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Contact angle Atomic layer deposition X-ray photoelectron spectroscopy General Materials Science Lotus effect Electrical and Electronic Engineering Thin film Titanium Mechanical Engineering General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Nanostructures X-ray reflectivity Plant Leaves Mechanics of Materials Photocatalysis Lotus 0210 nano-technology Hydrophobic and Hydrophilic Interactions |
| Zdroj: | Nanotechnology. 24(24) |
| ISSN: | 1361-6528 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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