A5015277012- Graphene research and applications
- Carbon and Quantum Dots Applications
- Nanocluster Synthesis and Applications
- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- ZnO doping and properties
- Luminescence and Fluorescent Materials
- Gas Sensing Nanomaterials and Sensors
- Advanced Photocatalysis Techniques
- Topological Materials and Phenomena
- Carbon Nanotubes in Composites
- Transition Metal Oxide Nanomaterials
- Chemical and Physical Properties of Materials
- Nuclear materials and radiation effects
- Quantum and electron transport phenomena
- Ga2O3 and related materials
- Chalcogenide Semiconductor Thin Films
- Organic Electronics and Photovoltaics
- Luminescence Properties of Advanced Materials
- Solid-state spectroscopy and crystallography
- Advanced Condensed Matter Physics
- Semiconductor materials and interfaces
- Conducting polymers and applications
- 2D Materials and Applications
- Glass properties and applications
St Petersburg University
2016-2025
ITMO University
2024
Carbon dots (CDs) are light-emitting nanoparticles that show great promise for applications in biology and medicine due to the ease of fabrication, biocompatibility, attractive optical properties. Optical chirality, on other hand, is an intrinsic feature inherent many objects nature, it can play important role formation artificial complexes based CDs implemented enantiomer recognition, site-specific bonding, etc. We employed a one-step hydrothermal synthesis produce chiral from commonly used...
Chiral carbon dots have been produced <italic>via</italic> two synthetic approaches using <sc>l/d</sc>-cysteine resulting in improvement of emission quantum yield and realization two-photon absorption which are attractive features for bio applications.
Carbon dots (CDs) with an emission in the near infrared spectral region are attractive due to their promising applications bio-related areas, while fabrication still remains a challenging task. Herein, we developed template-assisted method using porous silica microspheres for formation of CDs optical transitions infrared. Two organic dyes, Rhodamine 6G and IR1061 yellow regions, respectively, were used as precursors CDs. Correlation morphology chemical composition properties obtained...
Abstract Nickel oxide is a promising material for transparent electronics applications. This semiconductor demonstrates the possibility of modifying its physical properties depending on method growth and subsequent processing. Here effects discharge power are reported during reactive dc magnetron sputtering, as well modes annealing NiO films, their structural, electrical, optical properties. films annealed at various temperatures both in an oxygen‐containing environment under vacuum...
Although chirality plays an important role in the natural world, it has also attracted much scientific attention nanotechnology, particular, spintronics and bioapplications. Chiral carbon dots (CDs) are promising nanoparticles for sensing bioimaging since they biocompatible, ecofriendly, free from toxic elements. Herein, green red emissive chiral CDs fabricated via surface modification treatment of achiral at room temperature. After with l-cysteine molecules, treated demonstrate intense...
Yb 3+ -CsPbCl x Br 3− perovskite nanocrystals with a high two-photon absorption cross-section of 2.3 × 10 5 GM embedded into amphiphilic silica microspheres emit visible and near-infrared light under infrared excitation in toluene water.
Bioimaging probes based on carbon dots (CDs) can become a useful replacement for existing commercial probes, benefiting clinical diagnostics. While the development of dual-mode CD-based magnetic resonance imaging (MRI), which provides ability photoluminescence (PL) detection at same time, is ongoing, several challenges have to be addressed. First, most still emit shorter wavelengths (blue/green spectral range), harmful biological objects or very low PL intensity in window tissue transparency...
Inorganic lead halide perovskite nanocrystals (NCs), particularly CsPbBr3, have attracted considerable attention due to their remarkable optical properties, positioning them as promising candidates for optoelectronics and bioimaging. Despite potential,...
Carbon dots (CDs) are fluorescent carbon nanomaterials that considered for applications in optoelectronics, sensorics, and biofields due to their low‐cost robust synthesis, versatile optical properties. Herein, it is demonstrated how chemical functionalization of hydrophilic or amphiphilic CDs with polyethylene glycol influences energy level structure hence the emission Functionalization results an increase quantum yield: from 30% 75% 20% 25% CDs. The estimated absolute values levels,...
The electronic and spin structure of a graphene monolayer synthesized on Pt(111) has been investigated experimentally by angle- spin-resolved photoemission with different polarizations incident synchrotron radiation using density functional theory calculations. It is shown that despite the observed total quasifreestanding character dispersion $\ensuremath{\pi}$ state remarkable local distortions breaks in dispersions take place due to hybridization between Pt $d$ states. Corresponding...
Chemically synthesized carbon dots (CDs) have attracted a lot of attention as an eco-friendly and cost-efficient light-emitting material, functionalization CD surfaces with additives different natures is useful way to control their properties. In this study, we show how post-synthetic treatment CDs citric acid, benzoic urea o-phenylenediamine changes chemical composition optical particular, it results in the formation carboxyl/imide/carbonyl groups at surface, leading appearance additional...
The use of acetylacetone in combination with benzoic acid and ethylenediamine led to amphiphilic carbon dots formation bright blue emission, which allowed us produce LEDs, luminescent inks, films for solar concentrators.
High-resolution spin- and angle-resolved photoemission spectroscopy measurements were performed on the three-dimensional topological insulator Bi${}_{2}$Te${}_{2.4}$Se${}_{0.6}$, which is characterized by enhanced thermoelectric properties. The Fermi level position found to be located in bulk energy gap independent of temperature it stable over a long time. Spin textures Dirac-cone state at energies above below Dirac point as well Rashba-type valence band surface are observed agreement with...
Anion-assisted cation doping in a nonpolar solvent at room temperature has been proposed as universal method to create multiple-band emitting lead halide perovskite nanostructures.
The structural and gas-sensitive properties of n-N SnO2/κ(ε)-Ga2O3:Sn heterostructures were investigated in detail for the first time. κ(ε)-Ga2O3:Sn SnO2 films grown by halide vapor phase epitaxy high-frequency magnetron sputtering, respectively. gas sensor response speed operation structures under H2 exposure exceeded corresponding values single within temperature range 25–175 °C. Meanwhile, demonstrated a low to CO, NH3, CH4 gases high NO2, even at concentrations 100 ppm. current responses...
Resistive metal/β-Ga2O3/metal structures with different interelectrode distances and electrode topologies were investigated. The oxide films deposited by radio-frequency magnetron sputtering of a Ga2O3 (99.999%) target onto an unheated sapphire c-plane substrate (0001) in Ar/O2 gas mixture. are sensitive to ultraviolet radiation wavelength λ = 254. Structures interdigital topology have pronounced persistent conductivity. It is shown that the magnitude responsivity, response time τr, recovery...