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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Journal ArticleDOI
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
Microstructural evolution of Au/TiO2 nanocomposite films: The influence of Au concentration and thermal annealing
Joel Nuno Pinto Borges,Joel Nuno Pinto Borges,Tomas Kubart,S. Kumar,Klaus Leifer,Marcos Rodrigues,N. Duarte,B. Martins,João Paulo Dias,Albano Cavaleiro,Filipe Vaz,Filipe Vaz +11 more
TL;DR: Nanocomposite thin films consisting of a dielectric matrix, such as titanium oxide (TiO2), with embedded gold (Au) nanoparticles were prepared and analyzed and discussed in detail in this article.
Journal ArticleDOI
Confinement-Induced Growth of Au Nanoparticles Entrapped in Mesoporous TiO2 Thin Films Evidenced by in Situ Thermo-Ellipsometry
Eduardo D. Martínez,Cédric Boissière,David Grosso,Clément Sanchez,Horacio Esteban Troiani,Galo J. A. A. Soler-Illia +5 more
TL;DR: In this paper, gold nanoparticles were infiltrated into mesoporous TiO2 thin films (MTTF) by an impregnation-reduction method and in situ ellipsometry measurements were performed during thermal treatment to follow in real time the changes in the optical constants and thickness of the composites systems while being submitted to continuous heating at different rates, from room temperature up to 600 °C.
Journal ArticleDOI
Growth and annealing strategies to control the microstructure of AlN:Ag nanocomposite films for plasmonic applications
A Siozios,H Zoubos,N. Pliatsikas,Demosthenes C. Koutsogeorgis,G. Vourlias,Eleni Pavlidou,Wayne Cranton,Panos Patsalas,Panos Patsalas +8 more
TL;DR: In this article, a critical comparison of the microstructure, morphology and optical performance of AlN:Ag cermet, nanocomposite films produced by two widely used PVD techniques, namely Pulsed Laser Deposition (PLD) and Sputtering, and by two post-growth processing techniques such as thermal and laser annealing is presented.
Journal ArticleDOI
Influence of stoichiometry and structure on the optical properties of AlNxOy films
Joel Nuno Pinto Borges,N.P. Barradas,Eduardo Alves,M.F. Beaufort,D. Eyidi,Filipe Vaz,Luis Marques +6 more
TL;DR: In this article, the optical properties of AlNxOy thin films with their composition and structural features, taking as reference the binary systems Al nx and Al oy, were analyzed.
Journal ArticleDOI
Broadband Optical Absorption Caused by the Plasmonic Response of Coalesced Au Nanoparticles Embedded in a TiO2 Matrix
Joel Nuno Pinto Borges,Joel Nuno Pinto Borges,Rui M. S. Pereira,Marcos Rodrigues,Tomas Kubart,S. Kumar,Klaus Leifer,Albano Cavaleiro,Tomas Polcar,Tomas Polcar,Mikhail Vasilevskiy,Filipe Vaz +11 more
TL;DR: In this article, the effect of Au nanoparticles concentration, size, and spatial distribution within a TiO2 dielectric matrix on the localized surface plasmon resonance (LSPR) band characteristics was experimentally and theoretically studied.