Development of Au/CuO nanoplasmonic thin films for sensing applications
| Autor: | Joel Nuno Pinto Borges, Nenad Bundaleski, João Paulo Dias, R. P. Domingues, Marcos Rodrigues, Maria Manuela Carvalho Proença, Filipe Vaz, João Trigueiro, Orlando M. N. D. Teodoro |
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| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Annealing (metallurgy) Thin films Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention X-ray photoelectron spectroscopy law Materials Chemistry Crystallization Thin film Surface plasmon resonance Science & Technology Surfaces and Interfaces General Chemistry Sputter deposition Localized surface plasmon resonance 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films CuO Chemical engineering 0210 nano-technology Au nanoparticles Magnetron sputtering Monoclinic crystal system |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | Nanocomposite thin films, containing Au nanoparticles dispersed in a CuO matrix, were prepared by reactive DC magnetron sputtering and post-deposition thermal annealing. The CuO matrix was found to be stoichiometric and the atomic concentration of Au was determined to be about 12.3 at.%. After the annealing process, the average size of the crystalline domains of the Au nanoparticles (fcc structure) increased from about 6 nm (at an annealing temperature of 300 °C) to approximately 13 nm (after annealing at 800 °C), with a progressive crystallization of the CuO matrix in the monoclinic structure. A nanoplasmonic effect due to the localized surface plasmon resonance (LSPR) phenomenon appeared in the films after annealing temperatures of 400 °C and higher. The correspondent LSPR bands appeared in the visible range of the transmittance spectra, becoming progressively narrower. Angle Resolved X-ray Photoelectron Spectroscopy results indicated that the surface of Au/CuO nanocomposite thin film is contaminated with a sub-nanometric layer (~ 0.6 nm) of hydrocarbons and that the Au nanoparticles are relatively homogenously dispersed inside the CuO dielectric matrix. Furthermore, the results seem also to indicate that the Au nanoparticles are covered with about 0.2 nm of CuO. Although further studies need to be performed to make clear the particular features of the present nanocomposite thin films’ system, this work shows promising results concerning some particular applications that are envisaged, namely their use as LSPR sensing platforms for particular molecules detection (e.g. gases). National Funds through FCT - Portuguese National Funding Agency for Science, Research and Technology, in the framework of the project PTDC/FIS-NAN/1154/2014 (FCT Projet 9471-RIDTI Reforçar a Investigação, o Desenvolvimento Tecnológico e a Inovação), co-financed byFEDER (POCI-01-0145-FEDER-016902). This research was also sponsored by FCT in the framework of the Strategic Funding UID/FIS/04650/2013. Joel Borges acknowledges FCT for his Post-Doc Grant SFRH/BPD/117010/2016 and Marco S. Rodrigues acknowledges his PhD-Grant from FCT with reference SFRH/BD/118684/2016. The authors would like to thank Paulo Pedrosa and Nicolas Martin (Université Bourgogne Franche-Comté) for SEM measurements and E. Alves (Instituto de plasmas e fusão nuclear-IST-Universidade de Lisboa) and N. P. Barradas (Centro de Ciências e Tecnologias Nucleares-IST-Universidade de Lisboa) for the RBS analyses info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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