A5100684029- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Semiconductor Quantum Structures and Devices
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanocluster Synthesis and Applications
- Carbon and Quantum Dots Applications
- Particle physics theoretical and experimental studies
- Spectroscopy and Quantum Chemical Studies
- Advanced biosensing and bioanalysis techniques
- Quantum Chromodynamics and Particle Interactions
- Perovskite Materials and Applications
- Rheology and Fluid Dynamics Studies
- Silicon Nanostructures and Photoluminescence
- Diamond and Carbon-based Materials Research
- Photonic Crystals and Applications
- High-Energy Particle Collisions Research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Molecular Junctions and Nanostructures
- Luminescence Properties of Advanced Materials
- Molecular spectroscopy and chirality
- Luminescence and Fluorescent Materials
- Carbon Nanotubes in Composites
- Graphene research and applications
- Near-Field Optical Microscopy
- Photodynamic Therapy Research Studies
ITMO University
2016-2025
Gubkin Russian State University of Oil and Gas
2015-2025
Institute for Nuclear Research
2022-2025
Moscow Engineering Physics Institute
2022-2023
National Research University Higher School of Economics
2022-2023
Novosibirsk State Technical University
1998-2022
United States Air Force Academy
2021
Institute of Laser Physics
2021
Moscow State University of Medicine and Dentistry
2021
Federal Medical-Biological Agency
2021
The ratio of branching fractions R(D*−)≡B(B0→D*−τ+ντ)/B(B0→D*−μ+νμ) is measured using a data sample proton-proton collisions collected with the LHCb detector at center-of-mass energies 7 and 8 TeV, corresponding to an integrated luminosity 3 fb−1. For first time, R(D*−) determined τ-lepton decays three charged pions in final state. B0→D*−τ+ντ yield normalized that B0→D*−π+π−π+ mode, providing measurement B(B0→D*−τ+ντ)/B(B0→D*−π+π−π+)=1.97±0.13±0.18, where uncertainty statistical second...
In this review we present new concepts and recent progress in the application of semiconductor quantum dots (QD) as labels two important areas biology, bioimaging biosensing.
The LHCb Upgrade II will fully exploit the flavour-physics opportunities of HL-LHC, and study additional physics topics that take advantage forward acceptance spectrometer. I begin operation in 2020. Consolidation occur, modest enhancements detector be installed, Long Shutdown 3 LHC (2025) these are discussed here. main installed long shutdown 4 (2030) build on strengths current experiment I. It operate at a luminosity up to $ 2 \times 10^{34} \rm cm^{-2}s^{-1}$, ten times detector. New...
This review is focused on new concepts and recent progress in the development of three major quantum dot (QD) based optoelectronic devices: photovoltaic cells, photodetectors LEDs.
A new class of chiral nanoparticles is great interest not only for nanotechnology, but also many other fields scientific endeavor. Normally the chirality in semiconductor nanocrystals induced by initial presence ligands/stabilizer molecules. Here we report intrinsic ZnS coated CdSe quantum dots (QDs) and rods (QRs) stabilized achiral ligands. As-prepared ensembles these have been found to be a racemic mixture d- l-nanocrystals which includes portion nonchiral so total solution does show...
Carbon dots (CDots) are a promising biocompatible nanoscale source of light, yet the origin their emission remains under debate. Here, we show that all distinctive optical properties CDots, including giant Stokes shift photoluminescence and strong dependence color on excitation wavelength, can be explained by linear response partially sp2-hybridized carbon domains located surface CDots' sp3-hybridized amorphous cores. Using simple quantum chemical approach, domain hybridization factor...
The evolution of the optical phonon spectra colloidal core/shell CdSe/ZnS quantum dots with an increase shell thickness from 0.5 to 3.4 monolayers has been studied by resonant Raman spectroscopy. results obtained suggest that ZnS changes its structure amorphous partly crystalline as increases. Simultaneously, in scattering surface (core/shell interface) phonons and redshift corresponding band have observed assigned variations structure. disorder present provides a major contribution line...
We demonstrate that the nanoscale assemblies of water-solubilized, oppositely charged CdSe/ZnS core/shell quantum dots and nanogold particles make it possible to develop FRET-based sensors with a donor quenching efficiency close 100%. The cw time-resolved photoluminescence analysis nanoassemblies different donor-to-acceptor ratios demonstrates prevalence 1:1 complexes. Experimental data perfectly fit mathematical simulation based on long-range FRET static model assembling nanoparticles....
Two-dimensional (2D) nanomaterials have been intensively investigated due to their interesting properties and range of potential applications. Although most research has focused on graphene, atomic layered transition metal dichalcogenides (TMDs) particularly MoS2 gathered much deserved attention recently. Here, we report the induction chirality into 2D chiral by carrying out liquid exfoliation in presence ligands (cysteine penicillamine) water. This processing resulted exfoliated nanosheets...
Abstract Controlling the transport and minimizing charge carrier trapping at interfaces is crucial for performance of various optoelectronic devices. Here, how electronic properties stable, abundant, easy‐to‐synthesized carbon dots (CDs) are controlled via surface chemistry through a chosen ratio their precursors citric acid ethylenediamine demonstrated. This allows to adjust work function indium tin oxide (ITO) films over broad range 1.57 eV, deposition thin CD layers. modifiers with...
A space-confined vacuum heating method has been developed to produce carbon dots which do not experience aggregation-induced luminescence quenching.
The availability of carbon dots (CDots) with bright red photoluminescence (PL) would significantly broaden the range their biological and optoelectronic applications. We present a theoretical model that predicts amino functionalization CDots not only shifts PL to longer wavelengths but also preserves large oscillator strengths fundamental radiative transitions CDots. considers optical response amino-functionalized determined by molecule-like subunits polycyclic aromatic hydrocarbons one,...
We report four narrow peaks in the Ξ_{b}^{0}K^{-} mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity 9 fb^{-1} recorded by LHCb experiment. Referring these states their mass, values are m[Ω_{b}(6316)^{-}]=6315.64±0.31±0.07±0.50 MeV, m[Ω_{b}(6330)^{-}]=6330.30±0.28±0.07±0.50 m[Ω_{b}(6340)^{-}]=6339.71±0.26±0.05±0.50 m[Ω_{b}(6350)^{-}]=6349.88±0.35±0.05±0.50 where uncertainties statistical, systematic, last...
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...
Abstract We present a new experimental study of the quantum entanglement photon pairs produced in positron-electron annihilation at rest. Each has an energy that is five orders magnitude higher than photons optical experiments. It provides unique opportunity for controlled Compton pre-scattering initial before polarization measurements. The setup includes system polarimeters to measure angular correlations and thus prepared pre-scattered states. For first time, direct comparison been carried...
We report on an anomalous size dependence of the room-temperature photoluminescence decay time from lowest-energy state PbS quantum dots in colloidal solution, which was found using transient luminescence spectroscopy. The observed 10-fold reduction (from ~2.5 to 0.25 μs) with increase dots' diameter is explained by existence phonon-induced transitions between in-gap state-whose energy drastically depends diameter-and fundamental dots.
This work presents a comprehensive study of electroabsorption in CdSe colloidal quantum dots, nanorods, and nanoplatelets. We experimentally demonstrate that the exposure nanoplatelets to dc electric field leads strong broadening their lowest-energy heavy-hole absorption band drastically reduces efficiency within band. These are results quantum-confined Stark Franz–Keldysh effects. The field-induced change nanoplatelets' is found be more than 10 times by dots. also nanorods weaker dots...
Stable water-soluble complexes of Cd-free ZnSe/ZnS quantum dots (QDs) and chlorin e6 have been prepared. These shown approximately 50% intracomplex fluorescence resonance energy transfer from QDs to e6. The photodynamic therapy (PDT) test the against Erlich acsite carcinoma cell culture demonstrated a two-fold enhancement cancer destruction as compared that free molecules. It was PDT effect significantly increased due two factors: efficient QD–chlorin photoexcitation improvement cellular...
Optical activity is a common natural phenomenon, which occurs in individual molecules, biomolecules, biological species, crystalline solids, liquid crystals, and various nanosized objects, leading to numerous important applications almost every field of modern science technology. Because this can hardly be altered, creation artificial active media with controllable optical properties paramount importance. Here, for the first time best our knowledge, we theoretically demonstrate that inherent...
Abstract Fast and reliable separation of enantiomers chiral nanoparticles requires elimination all the forces that are independent nanoparticle handedness creation a sufficiently strong force either pushes different in opposite directions or delays diffusion one them with respect to other. Here we show how construct such completely optical using two counterpropagating circularly polarized plane waves helicities. We then explore capabilities related enantioseparation method by analytically...
The influence of chlorine-containing solvents on the optical properties carbon dots supports existence polycyclic aromatic hydrocarbons.
The influence of the chirality semiconductor nanocrystals, CdSe/ZnS quantum dots (QDs) capped with L- and D-cysteine, on efficiency their uptake by living Ehrlich Ascite carcinoma cells is studied spectral- time-resolved fluorescence microspectroscopy. We report an evident enantioselective process where cellular L-Cys QDs almost twice as effective that D-Cys QDs. This finding paves way for creation novel approaches to control biological properties behavior nanomaterials in cells.
Abstract For centuries mankind has been modifying the optical properties of materials: first, by elaborating geometry and composition structures made materials found in nature, later structuring existing at a scale smaller than operating wavelength. Here we suggest an original approach to introduce activity nanostructured materials, theoretically demonstrating that conventional achiral semiconducting nanocrystals become optically active presence screw dislocations, which can naturally...