Production of Au clusters by plasma gas condensation and their incorporation in oxide matrixes by sputtering
| Autor: | N.M. Figueiredo, Albano Cavaleiro, R. Serra, N.K. Manninen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Nanocomposite Materials science Condensation Oxide General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surfaces Coatings and Films chemistry.chemical_compound Chemical engineering chemistry Sputtering 0103 physical sciences Deposition (phase transition) Particle Surface plasmon resonance 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | Applied Surface Science. 440:144-152 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2018.01.011 |
| Popis: | Gold clusters were produced by plasma gas condensation method and studied in great detail for the first time. The influence of argon flow, discharge power applied to the Au target and aggregation chamber length on the size distribution and deposition rate of Au clusters was evaluated. Au clusters with sizes between 5 and 65 nm were deposited with varying deposition rates and size dispersion curves. Nanocomposite Au-TiO2 and Au-Al2O3 coatings were then deposited by alternating sputtering. These coatings were hydrophobic and showed strong colorations due to the surface plasmon resonance effect. By simulating the optical properties of the nanocomposites it was possible to identify each individual contribution to the overall surface plasmon resonance signal. These coatings show great potential to be used as high performance localized surface plasmon resonance sensors or as robust self-cleaning decorative protective layers. The hybrid method used for depositing the nanocomposites offers several advantages over co-sputtering or thermal evaporation processes, since a broader range of particle sizes can be obtained (up to tens of nanometers) without the application of any thermal annealing treatments and the properties of clusters and matrix can be controlled separately. |
| Databáze: | OpenAIRE |
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