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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: closed (10 October 2023) | Viewed by 6784

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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, D02 PN40 Dublin 2, 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

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Keywords

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

Published Papers (4 papers)

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Research

11 pages, 4142 KiB

Open AccessArticle

Nanostructured Luminescent Gratings for Sensorics

by Lyubov’ Borodina, Vladimir Borisov, Kirill Annas, Aliaksei Dubavik, Andrey Veniaminov and Anna Orlova

Materials 2022, 15(22), 8195; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15228195 - 18 Nov 2022

Viewed by 1007

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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11 pages, 2981 KiB

Open AccessArticle

Engineering the Optical Properties of CsPbBr₃ Nanoplatelets through Cd²⁺ Doping

by Ivan D. Skurlov, Anastasiia V. Sokolova, Danila A. Tatarinov, Peter S. Parfenov, Danil A. Kurshanov, Azat O. Ismagilov, Aleksandra V. Koroleva, Denis V. Danilov, Evgeniy V. Zhizhin, Sergey V. Mikushev, Anton N. Tcypkin, Anatoly V. Fedorov and Aleksandr P. Litvin

Materials 2022, 15(21), 7676; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15217676 - 01 Nov 2022

Cited by 4 | Viewed by 1849

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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16 pages, 2919 KiB

Open AccessArticle

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

by Ksenia A. Maleeva, Ilia E. Kaliya, Anton P. Tkach, Anton A. Babaev, Michail A. Baranov, Kevin Berwick, Tatiana S. Perova, Alexander V. Baranov and Kirill V. Bogdanov

Materials 2022, 15(15), 5197; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15155197 - 27 Jul 2022

Cited by 2 | Viewed by 1537

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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17 pages, 3875 KiB

Open AccessArticle

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

by Dorian Minkov, Emilio Marquez, George Angelov, Gavril Gavrilov, Susana Ruano and Elias Saugar

Materials 2021, 14(16), 4681; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14164681 - 19 Aug 2021

Cited by 6 | Viewed by 1550

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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