Journal ArticleDOI
Thin films composed of Au nanoparticles embedded in AlN: Influence of metal concentration and thermal annealing on the LSPR band
R. P. Domingues,Marcos Rodrigues,Maria Manuela Carvalho Proença,Diogo Emanuel Carvalho Costa,Eduardo Alves,N.P. Barradas,Filipe J. Oliveira,Rui F. Silva,Joel Nuno Pinto Borges,Filipe Vaz +9 more
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TLDR
In this paper, the possibility of using aluminium nitride (AlN) as a host dielectric matrix for LSPR films was evaluated, and three sets of nanocomposite Au:AlN films were prepared by magnetron sputtering, followed by thermal annealing to promote the growth of the nanoparticles.About:
This article is published in Vacuum.The article was published on 2018-11-01. It has received 22 citations till now. The article focuses on the topics: Nanocomposite & Nanoparticle.read more
Citations
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Development of label-free plasmonic Au-TiO2 thin film immunosensor devices
Ana I. Barbosa,Joel Nuno Pinto Borges,Diana Isabela Faria Meira,Diogo Emanuel Carvalho Costa,Marcos Rodrigues,Rita Rebelo,Vitor M. Correlo,Filipe Vaz,Rui L. Reis +8 more
TL;DR: Experimental results demonstrated the successful functionalization of the films' surface with antibodies, with the immobilization occurring preferentially in the exposed nanoparticles and negligibly on the TiO2 matrix, which demonstrates the suitability for the development of cost-effective, label-free LSPR based immunosensor devices.
Journal ArticleDOI
Nanocomposite thin films based on Au-Ag nanoparticles embedded in a CuO matrix for localized surface plasmon resonance sensing
Maria Manuela Carvalho Proença,Joel Nuno Pinto Borges,Joel Nuno Pinto Borges,Marcos Rodrigues,Diana Isabela Faria Meira,Paula Sampaio,João Paulo Dias,P. Pedrosa,P. Pedrosa,Nicolas Martin,Nenad Bundaleski,Orlando M. N. D. Teodoro,Filipe Vaz,Filipe Vaz +13 more
TL;DR: In this article, thin films composed of monometallic Au and Ag, and bimetallic Au Ag nanoparticles, dispersed in a CuO matrix were prepared, characterised and tested for Localized Surface Plasmon Resonance (LSPR) sensing.
Journal ArticleDOI
Gas Sensors Based on Localized Surface Plasmon Resonances: Synthesis of Oxide Films with Embedded Metal Nanoparticles, Theory and Simulation, and Sensitivity Enhancement Strategies
Marcos Rodrigues,Joel Nuno Pinto Borges,C. Lopes,Rui M. S. Pereira,Mikhail Vasilevskiy,Filipe Vaz +5 more
TL;DR: In this article, the Portuguese Foundation for Science and Technology (FCT) funded the research of Marco S. Rodrigues and his colleagues in the context of the Strategic Funding UIDB/04650/2020.
Journal ArticleDOI
Optimization of Au:CuO Nanocomposite Thin Films for Gas Sensing with High-Resolution Localized Surface Plasmon Resonance Spectroscopy.
TL;DR: The results showed that the Au:CuO thin film system is a RI sensitive platform able to detect inert gases, which can be more sensitive to detect non-inert gases as O2 or even other reactive species.
Journal ArticleDOI
Electron Tomography of Plasmonic Au Nanoparticles Dispersed in a TiO2 Dielectric Matrix.
Siddardha Koneti,Joel Nuno Pinto Borges,Lucian Roiban,Marcos Rodrigues,Nicolas Martin,Thierry Epicier,Filipe Vaz,Philippe Steyer +7 more
TL;DR: The goal was to assess the nanostructural characteristics and correlate them with the optical properties of the AuNPs, particularly the localized surface plasmon resonance (LSPR) behavior, and to provide the identification of "hot-spots".
References
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Journal ArticleDOI
Protective Ag :TiO2 thin films for pressure sensors in orthopedic prosthesis: the importance of composition, structural and morphological features on the biological response of the coatings
C. Lopes,P. Fonseca,P. Fonseca,Teresa Matamá,Andreia C. Gomes,C. Louro,Sandra Paiva,Filipe Vaz +7 more
TL;DR: Biological characterization showed that the antimicrobial activity and cytotoxicity of the coatings were directly related with their composition, closely followed by the particular structural and morphological features, namely those resulting from annealing process.
Journal ArticleDOI
Growth and size distribution of Au nanoparticles in annealed Au/TiO2 thin films
TL;DR: In this paper, the first stages of the formation of gold nanoparticles by thermal annealing of Au-doped TiO2 thin films grown by magnetron sputtering were investigated.
Journal ArticleDOI
Effect of clustering on the surface plasmon band in thin films of metallic nanoparticles
Rui M. S. Pereira,Joel Nuno Pinto Borges,Joel Nuno Pinto Borges,Filipa Cavaco Reis Peres,Paulo A. S. Pereira,Georgi Smirnov,Filipe Vaz,Albano Cavaleiro,Mikhail Vasilevskiy +8 more
TL;DR: In this article, the optical response of ensembles of polarizable metallic nanoparticles (NPs) that form submonolayer films of particles adsorbed on a dielectric substrate was investigated.
Journal ArticleDOI
Structure, stability and mechanical performance of AlN:Ag nanocomposite films
A. Lotsari,G. P. Dimitrakopulos,Th-H. Kehagias,P. Kavouras,H. Zoubos,L. E. Koutsokeras,Panos Patsalas,Ph-H. Komninou +7 more
TL;DR: In this paper, a hard AlN matrix incorporating soft Ag inclusions (AlN:Ag) and which are suitable for protective coatings are presented. The growth has been performed using Pulsed Laser Deposition and the film structural properties, such as nanoparticle size and distribution, were studied in relation to the growth parameters.
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Process monitoring during AlNxOy deposition by reactive magnetron sputtering and correlation with the film's properties
TL;DR: In this paper, the direct current magnetron discharge parameters during the deposition process were investigated by optical emission spectroscopy and a plasma floating probe was used to record the discharge voltage, the electron temperature, the ion flux, and the optical emission lines for different reactive gas flows, near the target and close to the substrate.