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Abstract
In this work the results on thermal nanostructuring of the Au films on Ti templates as well as morphology and optical properties of the obtained structures are reported. The bimetal nanostructures are fabricated in a multi-step process. First, the titania nanotubes are produced on the surface of Ti foil by anodization in an ethylene glycol-water solution containing fluoride ions. This is followed by chemical etching in oxalic acid and results in a highly ordered dimpled surface. Subsequently, thin gold films (5–20 nm) are deposited onto prepared Ti substrates by magnetron sputtering. The as-prepared layers are then dewetted by the UV nanosecond laser pulses or alternatively in the furnace (temperature < 500 °C). The SEM inspection reveals formation of honeycomb nanostructures (cavity diameter: ∼100 nm) covered with Au nanoparticles (NPs). It is observed that both the laser annealing and continuous thermal treatment in furnace can lead to the creation of NPs inside every Ti dimple and result in uniform coating of the whole area of structured templates. The size and localization of NPs obtained via both dewetting processes as well as their shape can be tuned by the annealing time and the laser processing parameters and also by initial thickness of Au layer and presence of the dimples themselves in the substrate. Results confirm that the prepared material can be used as substrate for SERS (Surface Enhanced Raman Spectroscopy).
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Authors (8)
-
Katarzyna Grochowska
- PAN IMP
-
Katarzyna Siuzdak
- PAN IMP
-
Łukasz Burczyk
- PAN IMP
-
Gerard Śliwiński prof.
- PAN IMP
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Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
APPLIED SURFACE SCIENCE
no. 418,
pages 472 - 480,
ISSN: 0169-4332 - Language:
- English
- Publication year:
- 2017
- Bibliographic description:
- Grochowska K., Siuzdak K., Macewicz Ł., Skiba F., Karczewski J., Szkoda M., Burczyk Ł., Śliwiński G.: Nanostructuring of thin Au films deposited on ordered Ti templates for applications in SERS// APPLIED SURFACE SCIENCE. -Vol. 418, nr. Part B (2017), s.472-480
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.apsusc.2016.12.163
- Verified by:
- Gdańsk University of Technology
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