Plasmon-enhanced fluorometry based on gold nanostructure arrays. Method and device

Chegel, V. I.

doi:10.15407/spqeo18.03.272

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…The LSPR is seen to shift toward longer wavelengths and become more intense with increasing cover thickness. The shift has been discussed elsewhere [19,37], while not much attention has been paid to the growth in polarizability [38]. A key difference between the experiments and simulations is that the latter exhibit higher LSPR quality factors.…”

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confidence: 97%

Nonresonant Local Fields Enhance Second-Harmonic Generation from Metal Nanoislands with Dielectric Cover

et al. 2018

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We study second-harmonic generation from gold nanoislands covered with amorphous titanium oxide (TiO_{2}) films. As the TiO_{2} thickness increases, the plasmon resonance of the nanoislands shifts away from the second-harmonic wavelength of 532 nm, diminishing the resonant enhancement of the process at this wavelength. Nevertheless, the second-harmonic signal is enhanced by up to a factor of 45 with increasing TiO_{2} thickness. This unexpected effect arises from the scaling of local fields at the fundamental wavelength of 1064 nm-which is at the far tail of the resonance-due to a change in the dielectric environment of the nanoislands.

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confidence: 97%

Nonresonant Local Fields Enhance Second-Harmonic Generation from Metal Nanoislands with Dielectric Cover

et al. 2018

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“…The mass thickness of gold island film of 10-12 nm was chosen as the value that allows separate well-defined Au nanostructures to be obtained with an expressed LSPR peak (Fig. 1b) after thermal annealing (550 °C, 2 hours in air atmosphere) [26].…”

Section: Methodsmentioning

confidence: 99%

Localized surface plasmon resonance nanochips with molecularly imprinted polymer coating for explosives sensing

Chegel¹,

Lopatynskyi²,

Lytvyn³

et al. 2020

SPQEO

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Sensor elements based on localized surface plasmon resonance phenomenon in arrays of Au nanostructures on glass substrates (nanochips) with molecularly imprinted acrylamide copolymer coating have been proposed for explosives analogues sensing in liquid and vapor phase. Nanochips exhibited detection limits of 1 pM in aqueous solution and 0.1 ppm in gaseous state against 4-nitrophenol. Vapor phase sensing of 4-nitrotoluene, 1-nitronaphthalene and 5-nitroisoquinoline using the developed 4-nitrophenol-imprinted plasmonic nanochips demonstrated partially selective response with time to signal saturation starting from 2 minutes.

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Concentration-dependent spectral rearrange-ment of photoluminescence in the nanocom-posite material “polycarbonate matrix – gold nanostructures – multidomain HTTH dye”

Hudzenko,

Lopatynskyi,

Lytvyn

et al. 2024

SPQEO

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In this work, the thiazole organic multidomain dye HTTH, which exhibits excited state intramolecular proton transfer (ESIPT) phenomenon, is used as a sample to investigate the influence of the component concentration of the “polycarbonate matrix – gold nanostructures – HTTH dye” system on its photoluminescence spectral characteristics. A hypothesis that different forms of the dye, such as enol form (in the ground state) and keto form (after proton transfer), may be involved in Förster resonance energy transfer (FRET) and plasmon resonance energy transfer (PRET) mediated by gold nanostructures was experimentally verified. The concentration dependence and spectral rearrangement in the photoluminescence of the developed thin-film nanocomposite based on gold nanostructures and HTTH with a transverse concentration gradient were demonstrated and explained by the efficiency of FRET and PRET phenomena depending on the system parameters. The ascertained features open up the possibility of additional manipulation of the spectral properties of the system based on ESIPT-exhibiting molecules by optimization of their parameters, particularly the concentration of components.

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Plasmon-enhanced fluorometry based on gold nanostructure arrays. Method and device

Cited by 3 publications

References 33 publications

Nonresonant Local Fields Enhance Second-Harmonic Generation from Metal Nanoislands with Dielectric Cover

Nonresonant Local Fields Enhance Second-Harmonic Generation from Metal Nanoislands with Dielectric Cover

Localized surface plasmon resonance nanochips with molecularly imprinted polymer coating for explosives sensing

Concentration-dependent spectral rearrange-ment of photoluminescence in the nanocom-posite material “polycarbonate matrix – gold nanostructures – multidomain HTTH dye”

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