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Special Issue "Optical Characterization of Novel Photonic Nanocomposite and Optically Active Nanomaterials"

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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: 10 October 2023 | Viewed by 5328

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Prof. Dr. Tatiana Perova

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Department of Electronic and Electrical Engineering, Trinity College Dublin, College Green, 2 Dublin, Ireland
Interests: infrared and Raman spectroscopy of condensed matter; semiconductor quantum dots; silicon photonic crystals; 2D materials; metal nanoparticles
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Prof. Dr. Yurii K. Gun'ko

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School of Chemistry, Trinity College Dublin, Dublin 2. D02 PN40, Ireland
Interests: quantum dots; magnetic nanomaterials; carbon nanomaterials; nano-bio-technology; biological imaging
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Prof. Dr. Alexander Baranov

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Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, 197101 Saint Petersburg, Russia
Interests: optics; photonics; nanostructures; nanotechnology

Special Issue Information

Dear Colleagues,

In the last decade, there has been a growing interest in the range of novel optical nanomaterials based on semiconductor nanocrystals of different shapes (quantum dots, wires, platelets) and metal nanostructures, which demonstrate unique properties. The unique optical properties of these materials allow them to be used in a wide range of photonic and plasmonic applications, including advanced light sources, photonic circuitry with novel architectures, photovoltaics, sensing, and bioimaging. The technology of synthesis and fabrication of these new composite materials requires knowledge and understanding of the relationship between the chemical structure and interactions in these systems, as well as knowledge of their optical characteristics suitable for specific applications. This Special Issue will be devoted to optical characterizations of new nanocomposites and optically active materials, including the use of UV-VIS, CD, infrared, and Raman spectroscopic techniques. Original research papers and review articles related to the above-mentioned areas are cordially invited.

Prof. Dr. Tatiana Perova
Prof. Dr. Yurii Gun'ko
Prof. Dr. Alexander Baranov
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

infrared and Raman spectroscopy of condensed matter
semiconductor quantum dots
silicon photonic crystals
2D materials
metal nanoparticles

Published Papers (7 papers)

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Research

Open AccessArticle

XRD and Spectroscopic Investigations of ZIF—Microchannel Glass Plates Composites

Justin Narimbi

Sivakumar Balakrishnan

and

Materials 2023, 16(6), 2410; https://doi.org/10.3390/ma16062410 - 17 Mar 2023

Viewed by 236

Abstract

In this study, new composite materials comprising zeolitic imidazolate framework (ZIF) structures and microchannel glass (MCG) plates were fabricated using the hydrothermal method and their morphological and spectral properties were investigated using XRD, SEM, FTIR, and Raman spectroscopy. XRD studies of powder samples revealed the presence of an additional phase for a ZIF-8 sample, whereas ZIF-67 samples, which were prepared through two different chemical routes, showed no additional phases. A detailed analysis of the FTIR and micro-Raman spectra of the composite samples revealed the formation of stable ZIF structures inside the macropores of the MCG substrate. The hydrophilic nature of the MCG substrate and its interaction with the ZIF structure resulted in the formation of stable ZIF-MCG composites. We believe that these composite materials may find a wide range of important applications in the field of sensors, molecular sieving. Full article

(This article belongs to the Special Issue Optical Characterization of Novel Photonic Nanocomposite and Optically Active Nanomaterials)

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Open AccessArticle

Multi-Frequency Light Sources Based on CVD Diamond Matrices with a Mix of SiV⁻ and GeV⁻ Color Centers and Tungsten Complexes

Nikolay A. Feoktistov

and

Materials 2022, 15(23), 8510; https://doi.org/10.3390/ma15238510 - 29 Nov 2022

Viewed by 513

Abstract

Recently, nanodiamonds with negatively charged luminescent color centers based on atoms of the fourth group (SiV⁻, GeV⁻) have been proposed for use as biocompatible luminescent markers. Further improvement of the functionality of such systems by expanding the frequencies of the emission can be achieved by the additional formation of luminescent tungsten complexes in the diamond matrix. This paper reports the creation of diamond matrices by a hot filament chemical vapor deposition method, containing combinations of luminescing Si-V and Ge-V color centers and tungsten complexes. The possibility is demonstrated of creating a multicolor light source combining the luminescence of all embedded emitters. The emission properties of tungsten complexes and Si-V and Ge-V color centers in the diamond matrices were investigated, as well as differences in their luminescent properties and electron-phonon interaction at different temperatures. Full article

(This article belongs to the Special Issue Optical Characterization of Novel Photonic Nanocomposite and Optically Active Nanomaterials)

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Open AccessArticle

Nanostructured Luminescent Gratings for Sensorics

and

Materials 2022, 15(22), 8195; https://doi.org/10.3390/ma15228195 - 18 Nov 2022

Viewed by 495

Abstract

Two-dimensional holographic structures based on photopolymer compositions with luminescent nanoparticles, such as quantum dots, are promising candidates for multiresponsive luminescence sensors. However, their applicability may suffer from the incompatibility of the components, and hence aggregation of the nanoparticles. We showed that the replacement of an organic shell at the CdSe/ZnS quantum dots’ surface with monomer molecules of the photopolymerizable medium achieved full compatibility with the surrounding medium. The effect was demonstrated by luminescence spectroscopy, and steady-state and time-resolved luminescent laser scanning microscopy. We observed the complete spectral independence of local photoluminescence decay, thus proving the absence of even nanoscale aggregation, either in the liquid composition or in the nodes and antinodes of the grating. Therefore, nanostructured luminescent photopolymer gratings with monomer-covered quantum dots can act as hybrid diffractive–luminescent sensor elements. Full article

(This article belongs to the Special Issue Optical Characterization of Novel Photonic Nanocomposite and Optically Active Nanomaterials)

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Open AccessArticle

Engineering the Optical Properties of CsPbBr₃ Nanoplatelets through Cd²⁺ Doping

Ivan D. Skurlov

Anastasiia V. Sokolova

Aleksandra V. Koroleva

and

Materials 2022, 15(21), 7676; https://doi.org/10.3390/ma15217676 - 01 Nov 2022

Viewed by 819

Abstract

Lead halide perovskite nanoplatelets (NPls) attract significant attention due to their exceptional and tunable optical properties. Doping is a versatile strategy for modifying and improving the optical properties of colloidal nanostructures. However, the protocols for B-site doping have been rarely reported for 2D perovskite NPls. In this work, we investigated the post-synthetic treatment of CsPbBr₃ NPls with different Cd²⁺ sources. We show that the interplay between Cd²⁺ precursor, NPl concentrations, and ligands determines the kinetics of the doping process. Optimization of the treatment allows for the boosting of linear and nonlinear optical properties of CsPbBr₃ NPls via doping or/and surface passivation. At a moderate doping level, both the photoluminescence quantum yield and two-photon absorption cross section increase dramatically. The developed protocols of post-synthetic treatment with Cd²⁺ facilitate further utilization of perovskite NPls in nonlinear optics, photonics, and lightning. Full article

(This article belongs to the Special Issue Optical Characterization of Novel Photonic Nanocomposite and Optically Active Nanomaterials)

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Open AccessArticle

Formation of Gold Nanoparticle Self-Assembling Films in Various Polymer Matrices for SERS Substrates

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Materials 2022, 15(15), 5197; https://doi.org/10.3390/ma15155197 - 27 Jul 2022

Viewed by 776

Abstract

Surface-enhanced Raman spectroscopy (SERS) is regarded as a versatile tool for studying the composition and structure of matter. This work has studied the preparation of a SERS substrate based on a self-assembling plasmonic nanoparticle film (SPF) in a polymer matrix. Several synthesis parameters for the SPF are investigated, including the size of the particles making up the film and the concentration and type of the self-assembling agent. The result of testing systems with different characteristics is discussed using a model substance (pseudoisocyanin iodide). These models can be useful in the study of biology and chemistry. Research results contain the optimal parameters for SPF synthesis, maximizing the SERS signal. The optimal procedure for SPF assembly is determined and used for the synthesis of composite SPFs within different polymer matrices. SPF in a polymer matrix is necessary for the routine use of the SERS substrate for various types of analytes, including solid samples or those sensitive to contamination. Polystyrene, polyvinyl alcohol (PVA), and polyethylene are investigated to obtain a polymer matrix for SPF, and various methods of incorporating SPF into a polymer matrix are being explored. It is found that films with the best signal enhancement and reproducibility were obtained in polystyrene. The minimum detectable concentration for the SERS substrate obtained is equal to 10⁻¹⁰ M. We prepared a SERS substrate with an analytical enhancement factor of 2.7 × 10⁴, allowing an increase in the detection sensitivity of analyte solutions of five orders of magnitude. Full article

(This article belongs to the Special Issue Optical Characterization of Novel Photonic Nanocomposite and Optically Active Nanomaterials)

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Open AccessArticle

Duo Emission of CVD Nanodiamonds Doped by SiV and GeV Color Centers: Effects of Growth Conditions

Kirill V. Bogdanov

Mikhail A. Baranov

Nikolay A. Feoktistov

and

Materials 2022, 15(10), 3589; https://doi.org/10.3390/ma15103589 - 18 May 2022

Cited by 1 | Viewed by 910

Abstract

The investigation of the hot filament chemical vapor deposition nanodiamonds with simultaneously embedded luminescent GeV⁻ and SiV⁻ color centers from solid sources showed that both the absolute and relative intensities of their zero-phonon lines (at 602 and 738 nm) depend on nanodiamond growth conditions (a methane concentration in the CH₄/H₂ gas mixture, growth temperature, and time). It is shown that a controlled choice of parameters of hot filament chemical vapor deposition synthesis makes it possible to select the optimal synthesis conditions for tailoring bicolor fluorescence nanodiamond labels for imaging biological systems. Full article

(This article belongs to the Special Issue Optical Characterization of Novel Photonic Nanocomposite and Optically Active Nanomaterials)

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Open AccessArticle

Further Increasing the Accuracy of Characterization of a Thin Dielectric or Semiconductor Film on a Substrate from Its Interference Transmittance Spectrum

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Materials 2021, 14(16), 4681; https://doi.org/10.3390/ma14164681 - 19 Aug 2021

Cited by 1 | Viewed by 940

Abstract

Three means are investigated for further increasing the accuracy of the characterization of a thin film on a substrate, from the transmittance spectrum T(λ) of the specimen, based on the envelope method. Firstly, it is demonstrated that the accuracy of [...] Read more.

\bar{d}

and the thickness non-uniformity ∆d over the illuminated area, increases, employing a simple dual transformation utilizing the product T(λ)x_s(λ), where T_sm(λ) is the smoothed spectrum of T(λ) and x_s(λ) is the substrate absorbance. Secondly, an approach is proposed for selecting an interval of wavelengths, so that using envelope points only from this interval provides the most accurate characterization of

\bar{d}

and ∆d, as this approach is applicable no matter whether the substrate is transparent or non-transparent. Thirdly, the refractive index n(λ) and the extinction coefficient k(λ) are computed, employing curve fitting by polynomials of the optimized degree of 1/λ, instead of by previously used either polynomial of the optimized degree of λ or a two-term exponential of λ. An algorithm is developed, applying these three means, and implemented, to characterize a-Si and As₉₈Te₂ thin films. Record high accuracy within 0.1% is achieved in the computation of

\bar{d}

and n(λ) of these films. Full article

(This article belongs to the Special Issue Optical Characterization of Novel Photonic Nanocomposite and Optically Active Nanomaterials)

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