N. V. Nikonorov

N. V. Nikonorov
ITMO University | SPbNRU ITMO · Department of Optoinformatic Technologies and Materials

Doctor of Science in Optics

About

393
Publications
26,851
Reads
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2,382
Citations
Citations since 2017
159 Research Items
1450 Citations
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300

Publications

Publications (393)
Article
For the first time the temperature dependence of the photoluminescence of the semiconductor CsPbBr3 perovskite nanocrystals with sizes of 6.0–9.0 nm in fluorophosphate glass were investigated in the temperature range from 300 K to 423 K. It was shown that temperature dependence of the photoluminescence intensity and the band gap shift coefficient c...
Article
Full-text available
ZnO–SnO2–Ag(AgCl) nanocomposites consisting of hexagonal ZnO, tetragonal SnO2, metallic Ag and AgCl nanocrystals were prepared by wet polymer-salt synthesis. The materials were studied using optical and luminescent spectroscopy, SEM, EDS and XRD analysis. The ability to generate chemically active singlet oxygen and antibacterial activity of prepare...
Article
Full-text available
The well-known standard photo-thermo-refractive (PTR) glass has some limitations in holographic applications in the visible region due to light scattering on the large NaF nanocrystals formed during the photo-thermo-induced (PTI) crystallization process. The large size of the NaF nanocrystals can be reduced by forming more nucleation centers (silve...
Article
Plasmonic nanocomposites ZnO–Ag and ZnO–SnO 2 –Ag(AgCl) were prepared by the polymer–salt method, and their structure and morphology were studied using XRD and SEM analyses. It was found that the addition of photoactive inorganic nanocomposites ZnO–Ag and ZnO–SnO 2 –Ag(AgCl) in pure water significantly enhances the effectiveness of its disinfection...
Conference Paper
Full-text available
This work presents the result of experiments on the synthesis of YAG nanopowders doped with (RE: Nd, Ce, Yb), prepared by modified Pechini method which is based on double stabilization of forming nanoparticles by citric acid and polyvinylpyrrolidone. Photoluminescence and FTIR spectroscopy, DTA/TG, XRD and SEM analysis were used to study their stru...
Preprint
Full-text available
The hot electron generation in plasmonic nanoparticles is the key to efficient plasmonic photocatalysis. In the paper, we study theoretically for the first time the effect of Tamm states (TSs) at the interface metal-semiconductor on hot electron generation and Landau damping (LD) in metal nanoparticles. TSs can lead to resonant hot electron generat...
Article
Full-text available
“My main goal was to point out new phenomena and spread the ideas, which will become the starting points for new research” (Nikola Tesla) [...]
Poster
Full-text available
Presents the result of experiments on the synthesis of gadolinium oxide nanopowders doped with neodymium via modified Pechini method. The evolution of the materials during thermal treatment was studied using differential thermal analysis, X-ray diffraction and luminescent spectroscopy.
Poster
Full-text available
Presents the result of experiments on the synthesis of YAG nanopowders doped with ND, Ce and Yb via Pechini method using polyvinylpyrrolidone. Spectral and structural characteristics were studied by luminescent spectroscopy, ATR-FTIR spectroscopy and X-ray diffraction.
Article
We report the development of a group of luminescent fibre-optic temperature sensors that use Ce ³⁺ -, Dy ³⁺ -, and Yb ³⁺ -doped yttrium aluminium garnet (YAG) nanophosphors as thermosensitive materials. The nanophosphors have been prepared in the form of powders with a crystallite size from 19 to 27 nm by a polymer ? salt method and exhibit bright...
Article
The results of a study of the structural features of thin silver and copper films synthesized by the chemical substitution reaction are presented. Silver films were obtained by immersing copper substrates in a solution of silver nitrate. Copper films were synthesized by immersing iron and tin-plated iron substrates in a copper sulfate solution. The...
Preprint
Full-text available
Landau Damping (LD) mechanism of the Localized Surface Plasmon (LSP) decay is studied for the hybrid nanoplasmonic (metal core/dielectric shell) structures. It is shown that LD in hybrid structures is strongly affected by permittivity and electron effective mass in the dielectric shell in accordance with previous observations by Kreibig, and the st...
Article
Full-text available
The paper presents a simple and low-cost fiber-optic sensor for detection of UV radiation. A sensor construction consists of a silica capillary with a photoactive composition based on an organic phosphor, organic solvent and epoxyacrylate inside and a multimode optical fiber in contact with each other. By adjusting the proportion of components in a...
Article
Pure CsPbBr3 and CsPbI3 perovskite nanocrystals are nucleated in the borogermanate glass. Nanocrystals precipitation in glass are controlled via isothermal treatment at temperatures above Tg by adjusting the temperature and duration starting from 15 min. X-ray diffraction data and optical measurements have confirmed the formation of 5-8 nm sized Cs...
Article
Full-text available
Photoactive and bactericidal ZnO-MgO-Ag nanocomposites have been synthesized by liquid polymer-salt method. Polyvinylpyrrolidone plays a double role during nanocomposites synthesis: as the stabilizing component at initial solutions stages and as a fuel during materials calcination. Prepared materials demonstrate the ability to generate chemically a...
Article
A silica microcapillary preform and a hollow-core anti-resonant optical fiber doped with small-size (<50 nm) Gd2O3:Nd³⁺ nanocrystals are fabricated by the liquid polymer-salt method for the first time, to our knowledge. Aqueous solutions of gadolinium nitrate and neodymium chloride and a soluble organic polymer (polyvinylpyrrolidone) are used to fo...
Article
Full-text available
Gadolinium oxide nanopowders doped with neodymium were prepared via modified Pechini method based on double stabilization of nanoparticles. Polyvinylpyrrolidone was used as an additional stabilizer at low-temperature stage of synthesis. This polymer also acts as a fuel during thermal treatment of precursors. Photoluminescence and FTIR spectroscopy,...
Article
Significant improvement of photoactive and bactericidal properties of oxide nanocomposites due to the spatial separation of forming nanoparticles during thermochemical synthesis has been described. The evolution processes proceeding at different stages of the nanocomposites synthesis were studied by optical and luminescent spectroscopy, XRD and SEM...
Article
Full-text available
The paper presents the results of an experimental investigation of the morphology of copper and silver thin films synthesized by the substitution reaction method. Silver films were synthesized by immersing polished substrates of copper (M1 brand) into silver nitrate solution. Copper films were synthesized by immersing substrates of iron (electrolyt...
Article
We developed a new chloride photo-thermo-refractive glass doped with ytterbium ions. The dependence of optical and spectral-luminescent characteristics on ytterbium concentration has been studied. Concentration dependence of excited state decay time has been analyzed taking into account the self-trapping and self-quenching mechanisms. The optimum c...
Article
For the first time, CsPbX3 (X=Cl, Br, I) nanocrystals (NCs) are synthesized in fluorophosphate glasses. The controlled formation of CsPbX3 quantum dots is realized by adjustment of cooling rate and heat treatment conditions. X-ray diffraction data and optical measurements have confirmed the formation of 4-11 nm sized CsPbX3 nanocrystals. The crysta...
Article
Internal quantum efficiencies of the surface photoemission (SPE) and the volume photoemission (VPE) from metal nanoparticles into a semiconductor environment are found and compared with each other, taking into account the discontinuity in the electron effective mass on the metal-semiconductor interface. It is found that SPE is less sensitive to the...
Article
Full-text available
Enhancement of the surface photoemission from metal into semiconductor by resonance tunneling of photoexcited electrons through (quasi-) discrete level in quantum well, located within Schottky barrier of the metal–semiconductor interface, is studied theoretically taking into account the difference between the electron masses in metal and semiconduc...
Article
In this study, the influence of small additives on the spectral and optical properties of Na+–Ag+ ion-exchanged silicate glass is presented. Polyvalent ions, for example, cerium and antimony, are shown to reduce silver ions to atomic state and promote the growth of photoluminescent silver molecular clusters and plasmonic silver nanoparticles. Na+–A...
Article
This work describes the study of the synthesis and characterization of bactericidal ZnO-SnO2 nanocomposites prepared by polymer-salt method. The structure and morphology of prepared materials were studied by XRD and SEM analysis. Prepared ZnO-SnO2 nanocomposites demonstrate the ability to generate singlet oxygen under external irradiation and high...
Article
Full-text available
The paper describes aspects of Gd 2 O 3 :Nd ³⁺ phosphors synthesis by the liquid polymer-salt method. The double role of polyvinylpyrrolidone as an organic solvent was revealed in the process of highly-luminescent cubic nanocrystals formation. The developed technique was applied for modification of a hollow-core anti-resonant optical fiber by thin...
Article
Frequency upconversion into green and red luminescence in fluorophosphate glasses doped with Er³⁺ ions (10²¹ to 10¹⁶ ion/cm³) and Yb³⁺ ions (10²¹ ion/cm³) while pumped with a 970 nm diode laser is presented. The red upconversion emission results from a two-photon excitation process. The upconversion emission intensity dependence on the incident pum...
Article
Silver molecular clusters were synthesized in photo-thermo-refractive glasses using the Na+–Ag+ ion exchange technique followed by heat treatment. Comprehensive study of cluster emission reveals the presence of spectrally separated fluorescence and phosphorescence with nanosecond and microsecond lifetime. Co-doping of glasses with Eu3+ was shown to...
Preprint
For the first time the quantum dots CsPbX_3 (X=Cl, Br, I) in the fluorophosphate glasses were prepared. The samples were precipitated by two methods:(i) through self-crystallization during cooling of the glass melt and (ii) heat treatment of the glass. Controlled formation of CsPbX_3 quantum dots was realized by adjustment of cooling rate and heat-...
Article
The interaction between glass surface and forming nanocrystals plays the important role in the formation of thin ZnO coatings crystal structure. The comparative study of the crystal structure of thin ZnO-based films and powders having similar chemical compositions was performed with the use of SEM, XRD analysis, optical, and luminescent spectroscop...
Article
Full-text available
The evolution of spectral and luminescent properties of Ag-containing composite coatings prepared by liquid technique has been studied. Double stabilization allows forming thin oxide films containing luminescent small Agn (n < 5) molecular clusters using the liquid technique. These clusters are non-stable intermediate products during the formation...
Article
The influence of UV irradiation on the formation Ag-containing composite and oxide films has been studied. UV irradiation accelerates the formation and growth Ag small molecular clusters and nanoparticles in Ag-containing film-forming solutions, composite and oxide coatings. Photochemical processes and evolution of different structural forms of sil...
Article
Ambient-air single-shot ablative femtosecond laser surface processing of an advanced Al-alloy AA5083 was characterized by non-contact broadband ultrasonics, scanning electron microscopy with energy-dispersive x-ray spectroscopy, x-ray diffraction, and Vickers microhardness tests. The characterization indicates that the generated Mbar-level shock wa...
Article
Full-text available
An augmented reality display based on a planar waveguide made in photo-thermo-refractive glass had been demonstrated. The monolithic integration of multiplexed volume Bragg gratings with the waveguide platform provided in/out-coupling and image transmission from a portable projector. Design and calculation of the grating configuration was performed...
Article
Spectral-luminescent characteristics of erbium ions in photo-thermo-refractive (PTR) glasses doped with different concentrations of ytterbium and erbium oxides were investigated in this work. X-ray diffraction pattern of studied glasses was carried out. Judd-Ofelt parameters of intensity Ωt were obtained and used for deriving emission cross-section...
Article
We report data on the development of a polymer – salt method for the formation of aluminium yttrium garnet crystals doped with neodymium ions (YAG : Nd) inside the channels of a preform of microstructured fibre based on pure silica glass. The crystals are obtained by impregnating the channels with aqueous solutions of thermally decomposable salts (...
Article
A series of new fluorophosphate glasses with small content of phosphates doped with various Nd³⁺ ions concentration for optical applications has been prepared and characterized. Based on Judd-Ofelt intensity parameters, radiative transition probability, radiative lifetime, branching ratio, and emission cross-section of Nd³⁺ions have been derived fo...
Article
Phosphate glass with a high transmission level in the visible and near-IR spectral regions doped with a high cerium concentration (up to 25 mol%) was synthesized and experimentally investigated in terms of applicability as a material for magneto-optical devices. Glass transition temperature was 590 °C. Glass refractive index varied between 1.5831 a...
Article
Nanoscale silver clusters and metal Ag nanoparticles embedded in fluorophosphate glass were produced by Na/Ag ion exchange and subsequent heat treatment.The studied ion exchange was found to provide the reduction of Ag+ ions to Ago and formation of the small Ag2-4 clusters featuring with intensive luminescence. Treatment at the temperatures 320-410...
Article
Aqueous solutions containing polyvinylpyrrolidone and zinc and silver nitrates are studied by IR spectroscopy. It is shown that introduction of zinc and silver nitrates into polyvinylpyrrolidone solutions leads to a shift of the polymer absorption bands to lower wavenumbers. The results obtained indicate the possibility of formation of complexes co...
Article
The model of a fiber optic sensor device which operational principle is based on the thermal quenching of luminescence for ambient temperature measurements was experimentally studied. The construction of a multimode optical fiber with a transmission of more than 90%/m in the spectral region from 350 to 650 nm and a quartz capillary filled with a ph...
Article
The article presents the study of transparent bactericidal ZnO-SnO2 coatings prepared on a glass surface by a polymer-salt method using polyvinylpyrrolidone, zinc nitrate, and tin (IV) chloride solutions. The coatings were studied by spectroscopic and luminescent methods, SEM, XRD analysis and their antibacterial activities against gram-positive (S...
Article
The results of complex action of X-ray and nanosecond UV laser radiation on alkali-containing silicate glasses are presented. It is shown that X-ray irradiation of glasses forms luminescent color centers in them, which is related to increasing concentration of structural defects in glass network. Laser radiation destroys these defects, which is acc...
Article
Full-text available
We present a simple method of oriented prolate silver nanospheroid synthesis in silicate glasses. The appearance of silver nanospheroids in glass is confirmed by the shape of plasmon resonance absorption band in optical density spectrum, by TEM-images, and by calculation. Experiments have shown that nanocomposite with oriented silver spheroids poss...
Article
Transparent ZnO–MgO–Ag2O coatings are formed on glasses by the polymer–salt method, and the optical properties of these coatings are studied. The optical properties of the films are studied by optical spectroscopy and photoluminescence. The structure of the oxide coatings is studied by X-ray diffraction analysis and scanning electron microscopy. It...
Article
The article presents the study of the synthesis and characterization of nanostructured transparent ZnO-SnO2 coatings for the intensification of photodecomposition of organic contaminations. Thin transparent coatings were prepared on the glass surface by a polymer-salt method. Mixed oxide coatings were studied by spectroscopic and luminescent method...
Article
Microstructural and magnetic properties of potassium aluminoborate glasses 25K 2 O–25Al 2 O 3 –50B 2 O 3 (KAB): 4% Fe 2 O 3 (composition in mol %)are studied in a wide temperature range from 4.2 up 690 K by magnetometry, Mössbauer spectroscopy and electron spin resonance (ESR). Two samples of KAB: 4% Fe 2 O 3 before (Sample I)and after annealing (S...