The Interaction of CdSe/ZnS Quantum Dot with Plasmonic Ag Nanoparticles Deposited on Amorphous Hydrogenated Carbon Thin Films

Khmelevskaya, D.; Shcherbinin, D. P.; Konshina, E. A.; Abboud, M. M.; Dubavik, Aliaksei; Gladskikh, I. A.

doi:10.1134/s0030400x18110140

Cited by 7 publications

(7 citation statements)

References 6 publications

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“…A, St. Petersburg, 197101, Russia. Tel: +79111755103; fax: +7(812)4571830; e-mail: shcherbinin.dmitrij@gmail.com nanoparticles (NPs) (Konshina et al, 2018; and Ag NPs (Khmelevskaya et al, 2018;Shcherbinin et al, 2019;Konshina et al, 2020;Shmagina et al, 2020) affects the blue shift and intensity of the plasmon band in the optical density spectra. The intensity of dipole and quadrupole mode peaks increased in the optical density spectra after annealing of the hybrid structures at 200°C.…”

Section: Introductionmentioning

confidence: 99%

“…The usage of plasmonic nanostructures allows to control emission linewidth, peak and intensity of CdSe/ZnS semiconductor quantum dots (Soganci et al ., 2007; Chan et al ., 2009; Ahmed et al ., 2012; Wang et al ., 2015). The electronic structure of amorphous hydrogenated carbon in the thin‐film structures with Au nanoparticles (NPs) (Konshina et al ., 2018; Konshina et al ., 2019) and Ag NPs (Khmelevskaya et al ., 2018; Konshina et al ., 2019; Shcherbinin et al ., 2019; Konshina et al ., 2020; Shmagina et al ., 2020) affects the blue shift and intensity of the plasmon band in the optical density spectra. The intensity of dipole and quadrupole mode peaks increased in the optical density spectra after annealing of the hybrid structures at 200°C.…”

Section: Introductionmentioning

confidence: 99%

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Stereometric and fractal analysis of granulated silver films used in thin‐film hybrid structures

Ţălu

Shcherbinin

Konshina

et al. 2020

Journal of Microscopy

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Silver nanostructures are of interest to be used in hybrid thin-film structures with various materials. In this work, we analyse 3D AFM images of granulated silver film nanostructures prepared by thermal evaporation. The advanced AFM data study aims to understand how film thickness and postannealing affect the nanostructure morphology changes. For the first time, the evaluation of surface statistical parameters and fractal geometry were used to characterise the nanostructure morphology of Ag island films. The samples with gravimetric thickness of 2, 4 and 10 nm were analysed before and after annealing at 200°C for 10 min. The statistical processing revealed the essential variation of parameters with Ag film thickness increment and as a postannealing result. The nonmonotonic variation of surface roughness, skewness and fractal dimensions were found. It is caused by the features of the film growth process with the thickness increment and thermally activated diffusion of Ag nanoparticles during annealing.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stereometric and fractal analysis of granulated silver films used in thin‐film hybrid structures

Ţălu

Shcherbinin

Konshina

et al. 2020

Journal of Microscopy

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“…Spectrograph is extensively used in various fields, such as chemical research [1][2][3], medical detection [4], food industry and geological prospecting [5]. The basic principle of spectrograph is to break up light into separate colours by using the dispersion element [6].…”

Section: Introductionmentioning

confidence: 99%

Optical Design for Spectrograph with Coaxial Illumination

et al. 2019

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As an important optical instrument, spectrograph is widely used to analyze material components and some characteristics through spectral analysis, such as chemical research, medial detection, food industry, geological detection and other fields. Different spectrographs shall be chosen in different application fields. In this study, a transmission spectrograph was designed to detect spectrum of light scattered on an object surface. Working distance of this spectrograph was 30 mm and a coaxial illumination system was used in this spectrograph. Such illumination scheme eliminates reflected light rays of the objective lens and specular reflection light rays on the testing object surface by using polarization beam splitter, which increases the accuracy of the instrument. A LED was applied as the lighting source, so the instrument is characterized by low power consumption, quick response, and long service life. The designed spectrograph is optimized generally by CODE V10.4 with appropriate initial parameters and aspherical lens. The detection range and spectral resolution of the spectrograph are 400-780 nm and 0.4 nm, respectively.

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“…Подобные структуры могут использоваться в оптических сенсорах, широкополосных излучателях и в оптоэлектронных устройствах [1][2][3][4]. Плазмонные наночастицы Au и Ag встраивались в аморфную углеродную матрицу [5][6][7][8][9] и наносились на поверхность аморфных гидрогенизированных пленок (a-C : H) [10][11][12]. Настройка длины волны пика плазмонного резонанса в видимой области спектра, интенсивности и полуширины полосы плазмонного резонанса могут осуществляться путем изменения не только размера и формы металлических наночастиц, но также показателя преломления окружающей среды [13][14][15].…”

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“…Увеличение ширины оптической щели аморфного гидрогенизированного углерода коррелируетс уменьшением показателя преломления пленок и увеличением их прозрачности в видимой области спектра. Отжиг в интервале температур 200−300 • С вызывает изменение морфологии металлических наноструктур [10][11][12].…”

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Эллипсометрическое Исследование Тонкопленочных Структур Аморфного Гидрогенизированного Углерода И Наночастиц Золота

Толмачев¹,

Shcherbinin

Konshina³

2019

Журнал Технической Физики

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In this work, the optical constant films of amorphous hydrogenated carbon (a-C: H) and a hybrid structure based on it with a granulated gold film before and after their annealing at 300 °C were studied by spectral ellipsometry. The dispersions n (λ) and k (λ) of the a-C:H film were established using the Cauchy approximation and its thickness. The spectral features of the Au plasmon nanoparticle layer deposited on the a-C:H surface were modeled as an effective medium and a Lorentz oscillator. The parameters of the films and their thickness were determined by fitting the calculated spectra to the ellipsometric spectra  (λ) and  (λ). The obtained data were used to determine the parameters of the Lorentz oscillator in the model of a-C:H / Au two-layer structure. As a result of the a-C:H / Au structure annealing, the intensity of the maxima in the spectra n and k increased, their position shifted to the blue region, and the half-width of the bands decreased. The observed changes in the ellipsometric spectra are completely consistent with the spectrophotometric data of this structure.

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The Interaction of CdSe/ZnS Quantum Dot with Plasmonic Ag Nanoparticles Deposited on Amorphous Hydrogenated Carbon Thin Films

Cited by 7 publications

References 6 publications

Stereometric and fractal analysis of granulated silver films used in thin‐film hybrid structures

Stereometric and fractal analysis of granulated silver films used in thin‐film hybrid structures

Optical Design for Spectrograph with Coaxial Illumination

Эллипсометрическое Исследование Тонкопленочных Структур Аморфного Гидрогенизированного Углерода И Наночастиц Золота

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