Journal ArticleDOI
Sensitivity of Plasmonic Nanostructures Coated with Thin Oxide Films for Refractive Index Sensing: Experimental and Theoretical Investigations
Elisabeth Galopin,Joanna Niedziółka-Jönsson,Abdellatif Akjouj,Yan Pennec,Bahram Djafari-Rouhani,Adnane Noual,Rabah Boukherroub,Sabine Szunerits +7 more
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TLDR
In this article, the authors used the Lorentz−Drude model to investigate the refractive index sensitivity of multilayered localized surface plasmon resonance (LSPR) interfaces.Abstract:
This paper reports on the use of the Lorentz−Drude model to investigate the refractive index sensitivity, S (change of nanometer per refractive index unit, in nm RIU−1) of multilayered localized surface plasmon resonance (LSPR) interfaces. The investigated interface consists of an array of gold nanostructures (Au NSs) on glass (n1 = 1.51) coated with dielectric overlayers of different refractive index (n2 = 1.45−2.63) and varying thickness (0−300 nm). These interfaces are in contact with solvents of different refractive index (n3 = 1.000−1.630). The refractive index sensitivity for architectures with n1≤ n2 is found to be proportional to the amplitude of the oscillation of the wavelength at maximal absorption (λmax). It reaches its maximal value when the amplitude of the oscillation is maximal and its minimal value when the amplitude is null. The amplitude of the oscillations increases with an increase in refractive index of the dielectric. For n1 > n2, all the curves oscillate in phase leading quickly (d...read more
Citations
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Sensing using localised surface plasmon resonance sensors
TL;DR: In this review, a special emphasis will be given to techniques used to link plasmonic nanostructures to surfaces, and the difference between colorimetric and refractive index sensing approaches will be briefly described.
Journal ArticleDOI
Nanoplasmonic sensors for detecting circulating cancer biomarkers
TL;DR: This review discusses the relevance and applicability of three different categories of nanoplasmonic sensing techniques, namely surface plasmon resonance (SPR), localized surface plasant resonance (LSPR) and surface‐enhanced Raman scattering (SERS), for the detection of different classes of circulating cancer biomarkers.
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Colorimetric detection of cysteine using noncrosslinking aggregation of fluorosurfactant-capped silver nanoparticles
TL;DR: In this paper, the authors developed a selective and rapid colorimetric method for the determination of cysteine by using the nonionic fluorosurfactant-capped silver nanoparticles as a probe.
Journal ArticleDOI
Approach for Plasmonic Based DNA Sensing: Amplification of the Wavelength Shift and Simultaneous Detection of the Plasmon Modes of Gold Nanostructures
Jolanda Spadavecchia,Alexandre Barras,Joel Lyskawa,Patrice Woisel,William Laure,Claire-Marie Pradier,Rabah Boukherroub,Sabine Szunerits +7 more
TL;DR: The detection of DNA hybridization taking advantage of the plasmonic properties of gold nanostructures is described, with a significant decrease of the limit of detection from ≈40 nM as observed for unlabeled DNA to 0.2 nM for labeled DNA molecules.
Journal ArticleDOI
A silicon nitride coated LSPR based fiber-optic probe for possible continuous monitoring of sucrose content in fruit juices
TL;DR: In this paper, an improvement in refractive index (RI) sensitivity of a gold nanoparticle (AuNP) coated, U-shaped fiber-optic probe was achieved by a deposition of silicon nitride (SiNx) film on the probe surface.
References
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Numerical solution of initial boundary value problems involving maxwell's equations in isotropic media
Abstract: Maxwell's equations are replaced by a set of finite difference equations. It is shown that if one chooses the field points appropriately, the set of finite difference equations is applicable for a boundary condition involving perfectly conducting surfaces. An example is given of the scattering of an electromagnetic pulse by a perfectly conducting cylinder.
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A perfectly matched layer for the absorption of electromagnetic waves
TL;DR: Numerical experiments and numerical comparisons show that the PML technique works better than the others in all cases; using it allows to obtain a higher accuracy in some problems and a release of computational requirements in some others.
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Optical properties of metallic films for vertical-cavity optoelectronic devices.
TL;DR: The reflectance and the phase change on reflection from semiconductor-metal interfaces (including the case of metallic multilayers) can be accurately described by use of the proposed models for the optical functions of metallic films and the matrix method for multilayer calculations.
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Why gold nanoparticles are more precious than pretty gold: noble metal surface plasmon resonance and its enhancement of the radiative and nonradiative properties of nanocrystals of different shapes.
Susie Eustis,Mostafa A. El-Sayed +1 more
TL;DR: A number of applications are presented that take advantage of the electromagnetic field enhancement of the radiative properties of noble metal nanoparticles resulting from the surface plasmon oscillations.
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Localized surface plasmon resonance spectroscopy of single silver nanocubes
Leif J. Sherry,Shih-Hui Chang,George C. Schatz,Richard P. Van Duyne,Benjamin J. Wiley,Younan Xia +5 more
TL;DR: In this work, dark-field microscopy is used to observe a new plasmon resonance effect for a single silver nanocube in which the plAsmon line shape has two distinct peaks when the particles are located on a glass substrate.