A5008001796- Carbon and Quantum Dots Applications
- Nanocluster Synthesis and Applications
- Luminescence and Fluorescent Materials
- Quantum Dots Synthesis And Properties
- Ferroelectric and Piezoelectric Materials
- Perovskite Materials and Applications
- Acoustic Wave Resonator Technologies
- Graphene and Nanomaterials Applications
- Electronic and Structural Properties of Oxides
- Chalcogenide Semiconductor Thin Films
- Luminescence Properties of Advanced Materials
- Solid-state spectroscopy and crystallography
- Microwave Dielectric Ceramics Synthesis
- Electrochemical sensors and biosensors
- Advanced Thermoelectric Materials and Devices
- Nanomaterials for catalytic reactions
- Organic Light-Emitting Diodes Research
- Advanced biosensing and bioanalysis techniques
- Nanoplatforms for cancer theranostics
- Advanced Nanomaterials in Catalysis
ITMO University
2021-2025
Southern Federal University
2022
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...
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...
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 formation of red-emissive optical centers in carbon dots based on citric acid and formamide was investigated by varying the synthesis parameters with focus finding optimal─necessary sufficient─amount precursors to decrease byproduct amount increase chemical yield dots. emission is observed at 640 nm excited 590 quantum reaches up 19%. A high 26% achieved an optimal molar ratio 1:4.
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.
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...
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...
Luminescent carbon nanodots (CDs) are a low-toxic nanomaterial with tunable emission in wide spectral range and various functional groups on the surface. Therefore, CDs can prospectively serve as luminescent nanoprobes for biomedical applications, such drug-delivery, visualization, sensing, etc. The doping of paramagnetic or transition metals allows expansion applications fabrication multimodal nanoprobe bioimaging. Here, we developed doped manganese (Mn) based commonly used...
Subject of study . This is focused on luminescent carbon dots derived from o-phenylenediamine and gadolinium chloride or nitrate hexahydrate. Aim study. The aims to fabricate long-wavelength photoluminescent gadolinium-doped that could function as contrast agents for magnetic resonance imaging. Additionally, the investigates impact precursor type used chemical composition optical transitions resulting nanoparticles. Method. Carbon were synthesized using a one-step solvothermal method, their...
Subject of study . The spectral features nanocrystals with ternary compositions I-V-VI 2 and I-III-VI doped the rare earth metal ytterbium are investigated described. Purpose study. aim this work is to develop a novel synthesis method for these further examine their optical morphological properties. Method. average sizes AgInS :Yb AgBiS analyzed using atomic force microscopy dynamic light scattering, results compared. Spectrophotometry spectrofluorimetry employed record absorption...
On-going development of carbon dots (CDs) for different applications calls search novel methods their synthesis and surface functionalization. For fabrication light-emitting devices (LEDs), CDs should be soluble in non-polar solvents that are used ink-printing functional layers, apart from the obvious requirement bright luminescence. Herein, we introduce amphiphilic synthesized a mixture benzoic acid ethylenediamine acetylacetone, which satisfy both above mentioned requirements. These...
Dissipation of the charge injected into 0.5 × µm2 surface areas [100] – oriented 500 nm-thick epitaxial NaNbO3 film was studied by Kelvin Probe Force Microscopy. The elliptical area electric potential spot dissipates during ∼4 ÷ 4.5 h via leakage through and substrate. At final stage, a small negative clearly manifests itself in places blocks as existed before injection. This inherent explains previously found unipolarity this film. diffusion coefficient mobility carriers are estimated.
The optical characteristics of lead-free nanocrystals with a crystal structure the double perovskite type chemical composition Cs 2 AgInCl 6 , doped bismuth and coated silicon dioxide were studied, possibility their further application was shown. properties under study are analyzed by absorption luminescence spectroscopy, including those time resolution. Images obtained using scanning electron microscope. influence amount precursor addition on morphology established. It is shown that...