Surface-Enhanced Raman Scattering of Silicon Nanocrystals in a Silica Film

Новиков, С. Н.; Khriachtchev, Leonid

doi:10.1038/srep27027

Cited by 12 publications

(4 citation statements)

References 47 publications

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“…For instance, this technique is frequently used to investigate amorphous thin films with high-intensity Raman answer, in particular silicon, carbon [40]- [41]- [42]- [43] and chalcogenides [44]- [45]. For thin films (<1 µm), specific substrates (fluorides) with a low Raman background signal can be used [46]- [47] and, in some specific cases, surface-enhanced Raman scattering has a beneficial influence on the thin film signal intensity [48]- [49]. However, some practical applications require to deposit an amorphous silica thin film onto a silicate glass substrate.…”

Section: Introductionmentioning

confidence: 99%

Structural analysis of sputtered amorphous silica thin films: A Raman spectroscopy investigation

et al. 2021

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In this work, a structural characterization of sputtered silica films was carried out using Raman spectroscopy. Due to the low cross-section and the thinness of the silica layer, its Raman signature is dwarfed by that of the glass substrate and is therefore difficult to extract.Overcoming these limitations represents an experimental challenge and requires the development of specific analysis strategies. For this purpose, an integrated approach for extracting and interpreting the Raman signature of amorphous silica films deposited on a soda-lime glass substrate was developed, based on three distinct methods: delamination of the sputtered silica film, creating a reflective mask substrate by depositing a metallic silver coating on the glass substrate and applying a numerical signal analysis (Non-negative matrix factorization) to the multidimensional dataset acquired through depth profile acquisitions on silica films directly deposited on a glass substrate. The reliability of each proposed method is demonstrated for the extraction of the silica thin film Raman spectra. These various methods can be easily extended to other materials, either crystalline or amorphous. Furthermore, we discuss the advantages and the limits of each approach.Applying this methodology allowed us to highlight the structural differences between sputtered silica thin film and bulk vitreous silica glass (v-SiO2). Magnetron sputtering film deposition is shown to form dense silica glass layers, with an estimated densification ratio, 2 measured by x-ray reflectivity, equal to 7%. At the medium distance range, the network connectivity change in v-SiO2 is expressed by an unusually high population of three-membered rings leading to a more compact structure. The short-range order transformation was also studied by deriving the intertetrahedral angle decrease. The present results could be a step towards advanced investigation to gain insights into the structure of films at the atomic level.

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Section: Introductionmentioning

confidence: 99%

Structural analysis of sputtered amorphous silica thin films: A Raman spectroscopy investigation

et al. 2021

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“…Recently, SERS has been reported as a promising technique for quantitative and qualitative identifications of various targets 7 . It demonstrated the potential to impact the areas of analytical chemistry, biochemistry, forensics, environmental analysis, and trace analysis.…”

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confidence: 99%

Graphene Dendrimer-stabilized silver nanoparticles for detection of methimazole using Surface-enhanced Raman scattering with computational assignment

Saleh

Al-Shalalfeh

Al‐Saadi

2016

Sci Rep

193

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Graphene functionalized with polyamidoamine dendrimer, decorated with silver nanoparticles (G-D-Ag), was synthesized and evaluated as a substrate with surface-enhanced Raman scattering (SERS) for methimazole (MTZ) detection. Sodium borohydride was used as a reducing agent to cultivate silver nanoparticles on the dendrimer. The obtained G-D-Ag was characterized by using UV-vis spectroscopy, scanning electron microscope (SEM), high-resolution transmission electron microscope (TEM), Fourier-transformed infrared (FT-IR) and Raman spectroscopy. The SEM image indicated the successful formation of the G-D-Ag. The behavior of MTZ on the G-D-Ag as a reliable and robust substrate was investigated by SERS, which indicated mostly a chemical interaction between G-D-Ag and MTZ. The bands of the MTZ normal spectra at 1538, 1463, 1342, 1278, 1156, 1092, 1016, 600, 525 and 410 cm−1 were enhanced due to the SERS effect. Correlations between the logarithmical scale of MTZ concentrations and SERS signal intensities were established, and a low detection limit of 1.43 × 10−12 M was successfully obtained. The density functional theory (DFT) approach was utilized to provide reliable assignment of the key Raman bands.

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“…Also it has a great advantage of mass production also the nanograting support better plasmonic resonance. Traditional SERS substrates were fabricated onto glass in [108] , Ag in [109] , paper in [110] , Au in [111] , silicon in [5] . Another type was through deposition of nanoparticles as in [112] .…”

Section: Surface Enhanced Raman Spectroscopymentioning

confidence: 99%

“…Metasurface is classified into plasmonicmetasurface [1,2] and dielectric metasurface [3,4] . Dielectric metasurfaces are substrates made of high refractive index materials such as titanium dioxide and silicon as in [5,6] . This can produce variable guidance for the incident light properties.…”

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confidence: 99%

A Review on metasurface applications on optics-Surface Plasmon view

Elkady

Hagag²,

abdalla³

et al. 2023

Eng. Sci. and Milit. Techno.

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This paper deals with metasurface in different photonic applications. The main reason for our study is to show the great potential which metasurface has in applications within optical frequencies. A Significant part of this study focused on the history of metasurface and its different phenomenon specially the Surface Plasmon Polariton (SPP) phenomenon and its different applications. The basic theory of metasurface is introduced. The relation between metasurface and the SPP phenomenon is presented in this work. A comparison between different applications of the SPP phenomenon is investigated. A new approach and structures for metasurface in different applications such as Surface Enhanced Raman spectroscopy (SERS) and optical waveguides have been presented in this work. The connection between different applications and optics with the SPP phenomenon is presented. The physics of SPPs phenomenon and metasurface is represented briefly.

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Surface-Enhanced Raman Scattering of Silicon Nanocrystals in a Silica Film

Cited by 12 publications

References 47 publications

Structural analysis of sputtered amorphous silica thin films: A Raman spectroscopy investigation

Structural analysis of sputtered amorphous silica thin films: A Raman spectroscopy investigation

Graphene Dendrimer-stabilized silver nanoparticles for detection of methimazole using Surface-enhanced Raman scattering with computational assignment

A Review on metasurface applications on optics-Surface Plasmon view

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