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
TLDR
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.Abstract:
The effect of Au nanoparticles’ (NPs) concentration, size, and spatial distribution within a TiO2 dielectric matrix on the localized surface plasmon resonance (LSPR) band characteristics was experimentally and theoretically studied. The results of the analysis of the Au NPs’ size distributions allowed us to conclude that isolated NPs grow only up to 5 to 6 nm in size, even for the highest annealing temperature used. However, for higher volume fractions of Au, the coalescence of closely located NPs yields elongated clusters that are much larger in size and cause a considerable broadening of the LSPR band. This effect was confirmed by Monte Carlo modeling results. Coupled dipole equations were solved to find the electromagnetic modes of a supercell, where isolated and coalesced NPs were distributed, from which an effective dielectric function of the nanocomposite material was calculated and used to evaluate the optical transmittance and reflectance spectra. The modeling results suggested that the observed L...read more
Citations
More filters
Journal ArticleDOI
Noble metals-TiO2 nanocomposites: From fundamental mechanisms to photocatalysis, surface enhanced Raman scattering and antibacterial applications
TL;DR: In this paper, a comprehensive review of plasmonic photocatalyst nanocomposites and their multidisciplinary applications in the variety of fields of current interest from energy, environment to biomedical applications is presented.
Journal ArticleDOI
Review on charge transfer and chemical activity of TiO 2 : Mechanism and applications
Yongqing Cai,Yuan Ping Feng +1 more
TL;DR: In this article, the authors present the mechanism and outcome of charge transfer in TiO 2, which is extensively explored for photocatalytic applications in the field of environmental science.
Journal ArticleDOI
Optimization of nanocomposite Au/TiO 2 thin films towards LSPR optical-sensing
Marcos Rodrigues,Diana Soares da Costa,R. P. Domingues,M. Apreutesei,P. Pedrosa,Nicolas Martin,Vitor M. Correlo,Rui L. Reis,Eduardo Alves,N.P. Barradas,Paula Sampaio,Joel Nuno Pinto Borges,Filipe Vaz +12 more
TL;DR: In this article, the optical sensing capabilities were tailored by optimizing LSPR absorption bands of nanocomposite Au/TiO 2 thin films, which were grown by reactive DC magnetron sputtering.
Journal ArticleDOI
Integration of plasmonic Au nanoparticles in TiO2 hierarchical structures in a single-step pulsed laser co-deposition
Beatrice Roberta Bricchi,Matteo Ghidelli,Luca Mascaretti,Andrea Zapelli,Valeria Russo,Carlo Spartaco Casari,Giancarlo Terraneo,Ivano Alessandri,Caterina Ducati,Andrea Li Bassi +9 more
TL;DR: In this article, the plasmonic resonance of noble metal nanoparticles (NPs) can be exploited to enhance the photoresponse of wide band gap oxides in view of several solar energy applications.
Journal ArticleDOI
Nanoplasmonic response of porous Au-TiO2 thin films prepared by oblique angle deposition
Marcos Rodrigues,Joel Nuno Pinto Borges,Maria Manuela Carvalho Proença,P. Pedrosa,P. Pedrosa,Nicolas Martin,Konstantin Romanyuk,Konstantin Romanyuk,Andrei L. Kholkin,Andrei L. Kholkin,Filipe Vaz +10 more
TL;DR: It is demonstrated that zigzag nanostructures can enhance adsorption sites for LSPR sensing by tailoring the porosity of the thin films by improving the RI sensitivity of the films for higher incidence angles.
References
More filters
Journal ArticleDOI
Surface plasmon subwavelength optics
TL;DR: By altering the structure of a metal's surface, the properties of surface plasmons—in particular their interaction with light—can be tailored, which could lead to miniaturized photonic circuits with length scales that are much smaller than those currently achieved.
Journal ArticleDOI
Plasmonics for improved photovoltaic devices
Harry A. Atwater,Albert Polman +1 more
TL;DR: Recent advances at the intersection of plasmonics and photovoltaics are surveyed and an outlook on the future of solar cells based on these principles is offered.
Journal ArticleDOI
The kinetics of precipitation from supersaturated solid solutions
I.M. Lifshitz,V.V. Slyozov +1 more
TL;DR: In this paper, an analysis is made of the process whereby diffusion effects can cause the precipitation of grains of a second phase in a supersaturated solid solution, and the kinetics of this type of grain growth are examined in detail.
Journal ArticleDOI
Surface plasmon resonance sensors: review
TL;DR: Main application areas are outlined and examples of applications of SPR sensor technology are presented and future prospects of SPR technology are discussed.
Journal ArticleDOI
Plasmonics: merging photonics and electronics at nanoscale dimensions.
TL;DR: The current status and future prospects of plAsmonics in various applications including plasmonic chips, light generation, and nanolithography are reviewed.