Gas Sensing with Nanoplasmonic Thin Films Composed of Nanoparticles (Au, Ag) Dispersed in a CuO Matrix

Proença, Manuela; Rodrigues, Marco S.; Borges, Joel Nuno Pinto; Vaz, F.

doi:10.3390/coatings9050337

Cited by 17 publications

(9 citation statements)

References 47 publications

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“…502,503 A novel LSPR based approach is based on the combination of plasmonic nanostructures with other sensing methods, such as responsive photonic crystals (PCs) 233,[504][505][506] or metal oxide lms. 507,508 PCs are optical materials consisting of periodically arranged materials with different dielectric constants. These structures can be used as sensing materials since their diffraction wavelengths or intensities will change when they are exposed to physical or chemical stimuli.…”

Section: Methodology and Applicationsmentioning

confidence: 99%

Nanoparticles in analytical laser and plasma spectroscopy – a review of recent developments in methodology and applications

Galbács

Kéri

Kohut

et al. 2021

J. Anal. At. Spectrom.

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Section: Methodology and Applicationsmentioning

confidence: 99%

Nanoparticles in analytical laser and plasma spectroscopy – a review of recent developments in methodology and applications

Galbács

Kéri

Kohut

et al. 2021

J. Anal. At. Spectrom.

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“…Molecules interact with thin film sensors by adsorption (physisorption or chemisorption) or chemical reaction. These processes lead to a physical change in the film (sensor) that can be detected by variations in conductivity [8,9], mass [10], work function [11], or an optical property [12][13][14][15][16][17][18][19][20][21].…”

Section: Research Background On Gas Sensorsmentioning

confidence: 99%

Gas Sensors Based on Localized Surface Plasmon Resonances: Synthesis of Oxide Films with Embedded Metal Nanoparticles, Theory and Simulation, and Sensitivity Enhancement Strategies

et al. 2021

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This work presents a comprehensive review on gas sensors based on localized surface plasmon resonance (LSPR) phenomenon, including the theory of LSPR, the synthesis of nanoparticle-embedded oxide thin films, and strategies to enhance the sensitivity of these optical sensors, supported by simulations of the electromagnetic properties. The LSPR phenomenon is known to be responsible for the unique colour effects observed in the ancient Roman Lycurgus Cup and at the windows of the medieval cathedrals. In both cases, the optical effects result from the interaction of the visible light (scattering and absorption) with the conduction band electrons of noble metal nanoparticles (gold, silver, and gold–silver alloys). These nanoparticles are dispersed in a dielectric matrix with a relatively high refractive index in order to push the resonance to the visible spectral range. At the same time, they have to be located at the surface to make LSPR sensitive to changes in the local dielectric environment, the property that is very attractive for sensing applications. Hence, an overview of gas sensors is presented, including electronic-nose systems, followed by a description of the surface plasmons that arise in noble metal thin films and nanoparticles. Afterwards, metal oxides are explored as robust and sensitive materials to host nanoparticles, followed by preparation methods of nanocomposite plasmonic thin films with sustainable techniques. Finally, several optical properties simulation methods are described, and the optical LSPR sensitivity of gold nanoparticles with different shapes, sensing volumes, and surroundings is calculated using the discrete dipole approximation method.

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“…The paper "Gas Sensing with Nanoplasmonic Thin Films Composed of Nanoparticles (Au, Ag) dispersed in a CuO matrix" by Proença et al presents original and interesting nano-plasmonic platforms capable of detecting the presence of gas molecules [18]. The authors show that the localized surface plasmon resonance phenomenon, LSPR, is produced by the morphological changes of the nanoparticles (size, shape, and distribution modified by thermal annealing of the films).…”

Section: This Special Issuementioning

confidence: 99%

Advanced Strategies in Thin Films Engineering by Magnetron Sputtering

Palmero

Martin

2020

Coatings

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This Special Issue contains a series of reviews and papers representing some recent results and some exciting perspectives focused on advanced strategies in thin films growth, thin films engineering by magnetron sputtering and related techniques. Innovative fundamental and applied research studies are then reported, emphasizing correlations between structuration process parameters, new ideas and approaches for thin films engineering and resulting properties of as-deposited coatings.

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Gas Sensing with Nanoplasmonic Thin Films Composed of Nanoparticles (Au, Ag) Dispersed in a CuO Matrix

Cited by 17 publications

References 47 publications

Nanoparticles in analytical laser and plasma spectroscopy – a review of recent developments in methodology and applications

Nanoparticles in analytical laser and plasma spectroscopy – a review of recent developments in methodology and applications

Gas Sensors Based on Localized Surface Plasmon Resonances: Synthesis of Oxide Films with Embedded Metal Nanoparticles, Theory and Simulation, and Sensitivity Enhancement Strategies

Advanced Strategies in Thin Films Engineering by Magnetron Sputtering

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