A5084943936- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Nanocluster Synthesis and Applications
- Perovskite Materials and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Carbon and Quantum Dots Applications
- Luminescence and Fluorescent Materials
- Advanced Semiconductor Detectors and Materials
- Advanced biosensing and bioanalysis techniques
- 2D Materials and Applications
- Optical properties and cooling technologies in crystalline materials
- Plasmonic and Surface Plasmon Research
- Photonic Crystals and Applications
- Solid-state spectroscopy and crystallography
- Conducting polymers and applications
- Luminescence Properties of Advanced Materials
- Molecular Junctions and Nanostructures
- Nonlinear Optical Materials Studies
- Pickering emulsions and particle stabilization
- Silicon Nanostructures and Photoluminescence
- Advanced Nanomaterials in Catalysis
- Organic Light-Emitting Diodes Research
- Copper-based nanomaterials and applications
- Graphene research and applications
- Random Matrices and Applications
ITMO University
2016-2025
Institute of Information Technologies
2018
Moscow Power Engineering Institute
2012-2014
St Petersburg University
2010
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...
Functional nanostructures build up a basis for the future materials and devices, providing wide variety of functionalities, possibility designing bio-compatible nanoprobes, etc. However, development new nanostructured via trial-and-error approach is obviously limited by laborious efforts on their syntheses, cost manpower. This one reasons an increasing interest in design novel with required properties assisted machine learning approaches. Here, dataset synthetic parameters optical important...
Abstract Chirality is one of the most fascinating occurrences in natural world and plays a crucial role chemistry, biochemistry, pharmacology, medicine. has also been envisaged to play an important nanotechnology particularly nanophotonics, therefore, chiral chiroptical active nanoparticles (NPs) have attracted lot interest over recent years. Optical activity can be induced NPs several different ways, including via direct interaction achiral with molecule. This results circular dichroism...
The influence of chlorine-containing solvents on the optical properties carbon dots supports existence polycyclic aromatic hydrocarbons.
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.
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 off-resonant and resonant Raman spectra of optical phonons in colloidal CdSe nanoplatelets (NPLs) with the thickness 4, 5, 6 monolayers are analyzed. These dominated by SO LO phonon bands whose frequencies independent but demonstrate evident dependence similar to that observed for confined quantum dots Raman. results show conventional propagating along NPL lateral planes contribute mainly while perpendicular direction dominate excited resonance exciton transitions NPLs. An anisotropic...
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.
Small angle X-ray scattering, atomic force microscopy, optical and absorption luminescence spectroscopy have shown that the type amount of surface organic ligands a strong impact on morphology properties 2D superlattices formed by lead sulfide quantum dots (QDs) different sizes deposited glass substrate. This allows control process QD self-assembly, homogeneity superlattices, interparticle distance optimization ligands. It has been found annealing aging also influence stability structural...
Ternary quantum dots (QDs) are very promising nanomaterials with a range of potential applications in photovoltaics, light-emitting devices, and biomedicine. Despite quite intensive studies ternary QDs over the last years, specific relaxation channels involved their emission mechanisms still poorly understood, particularly corresponding core-shell nanostructures. In present work, we have studied recombination pathways AgInS2 stabilized ZnAgInS alloy layer ZnS shell (AIS/ZAIS/ZnS QDs) using...
Today, the development of nanomaterials with sensing properties attracts much scientific interest because demand for low-cost nontoxic colloidal nanoprobes high sensitivity and selectivity various biomedical environment-related applications. Carbon dots (CDs) are promising candidates these applications as they demonstrate unique optical intense emissions, biocompatibility, ease fabrication. Herein, we developed synthesis protocols to obtain CDs based on o-phenylenediamine a variety responses...
Luminescent composites based on entirely non-toxic, environmentally friendly compounds are in high demand for a variety of applications photonics and optoelectronics. Carbon dots recently developed kind luminescent nanomaterial that is eco-friendly, biocompatible, easy-to-obtain, inexpensive, with stable widely tunable emission. Herein, we introduce carbon different chemical compositions functional groups at the surface which were embedded nanoporous silicate glass. The structure optical...
Semiconductor colloidal nanoplatelets (NPLs) are a promising new class of nanostructures that can bring much impact on lightning technologies, light-emitting diodes (LED), and laser fabrication. Indeed, great progress has been made in optimizing the optical properties NPLs for visible spectral range, which already implementation number effective devices their basis possible. To date, state-of-the-art near-infrared (NIR)-emitting significantly inferior to visible-range counterparts, although...
In recent years, there has been rapid progress in the development of photonic devices based on lead halide perovskite nanocrystals since they possess a set unique optical and charge transport properties. However, main limiting factor for their subsequent application is poor stability against exposure to adverse environmental conditions. this work, study composite material CsPbBr3 embedded porous silica microspheres presented. We developed two different approaches change interface between...
Lead chalcogenide nanoplatelets (NPLs) have emerged as a promising material for devices operating in the near IR and spectrum region. Here, we first apply cation exchange method to PbSe/PbS core/shell NPL synthesis. The shell growth enhances colloidal environmental stability, passivates surface trap states, preserving main core physical properties. To prove great potential optoelectrical applications, fabricate photoconductor using NPLs. device demonstrates enhanced conductivity responsivity...
Abstract Strong enhancement of near‐infrared (NIR) emission lead sulfide quantum dots (QDs) induced by Cu 2− x Se semiconductor plasmonic nanocrystals (PNCs), both embedded into nanoporous silicate matrix is reported. The comes from resonant interaction QD optical transition dipole with the near field plasmons PNCs. Possible mechanisms photoluminescence broadening and shift, including Rabi splitting trap‐state‐related enhancement, are considered. As a result, novel luminescent material,...
Raman spectra of homogeneous and non‐homogeneous, compressively strained, Ge‐rich Ge 1− y Sn alloys (with < 13%), deposited by molecular beam epitaxy (MBE) techniques using various low‐temperature process conditions, were investigated polarized micro‐Raman spectroscopy. It is demonstrated that collecting both polarizations ( ) provides more insight into the structural features GeSn than spectroscopy an unpolarized probe beam. Acquiring polarization offers advantages enhancing behaviour...
Abstract Lead halide perovskite nanocrystals are attracting a lot of attention due to their superior optical properties, such as narrow emission bandwidths, and high photoluminescence quantum yields. Still, they far from practical implementation, since can rather easily degrade under ambient conditions, even more so at humidity, temperature, UV light exposure, which has triggered on‐going search for the suitable protective host matrices. We report luminescent composite material based on...