A5050123602- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Copper-based nanomaterials and applications
- Perovskite Materials and Applications
- Solid-state spectroscopy and crystallography
- Microfluidic and Capillary Electrophoresis Applications
- Electrochemical Analysis and Applications
- Electronic and Structural Properties of Oxides
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Optical properties and cooling technologies in crystalline materials
- Molecular Junctions and Nanostructures
- Advanced Biosensing Techniques and Applications
- Atmospheric Ozone and Climate
- Laser-Ablation Synthesis of Nanoparticles
- Organic Light-Emitting Diodes Research
- Concrete Corrosion and Durability
- 3D Printing in Biomedical Research
- Microfluidic and Bio-sensing Technologies
- Transition Metal Oxide Nanomaterials
- Smart Materials for Construction
Ioffe Institute
2023-2025
Saint Petersburg State Electrotechnical University
2016-2024
Hybrid organic–inorganic perovskites have emerged as promising materials for next-generation optoelectronic devices owing to their tunable properties and low-cost fabrication. We report the synthesis of 3D hybrid with monoethanolammonium cations. Specifically, we investigated morphological characteristics polycrystalline films MAxMEA1−xPbI3, which contain methylammonium (MA) (MEA) MAxMEA1−xPbI3 crystallizes in a tetragonal perovskite structure. The substitution cations ions led an increase...
In this paper, we present a technique for the synthesis of zinc oxide nanorods and study their sensitivity to organic solvent vapors. Zinc were synthesized by hydrothermal method. Investigation gas-sensitive properties was carried out method impedance spectroscopy. Studies showed significant response system vapor reducing gases at room temperature. It is shown that thickness seed layer and, correspondingly, density structure on basis ZnO nanorods, strongly affect sensor.
Abstract In this work, a sensor layer based on zinc oxide nanowires was synthesized by low-temperature hydrothermal method. The gas sensitivity of sample to isopropyl alcohol vapor studied both during heating and under ultraviolet radiation. It shown that depending the presence moisture surface nanowires, can act as reducing or oxidizing upon activation irradiation. there is an optimal intensity irradiation, which determines maximum response sample. moist air conditions demonstrates...
The work is focused on the study of gas sensitivity structures based ZnO nanorods at room temperature under conditions ultraviolet irradiation. Nanostructured layers were formed ceramic substrates with interdigitated electrodes. nanostructured to isopropyl alcohol vapor upon heating and irradiation has been studied. It shown that coatings have sufficient for practical use.
In the research, light-sensitive structures based on a heterostructure of ZnO- nanorods/PbS colloidal quantum dots (CQDs) were fabricated. The paper describes technological features obtaining coatings by low-temperature hydrothermal method and fabrication ZnO-nanorods/PbS CQDs heterostructure. It is shown that this structure capable converting light into electrical energy. These are promising for use as gas sensors functioning at temperatures close to room temperature.
Abstract Nanostructures based on zinc oxide were synthesized ceramic substrate with interdigitated electrodes by spin-coating and low-temperature hydrothermal method. The sensor response to CO, CO 2 O was studied at room temperature under near UV light illumination. Gas exposure supplied using metrological certified equipment. All samples showed no . Layers nanowires are most sensitive because of complex morphology more effective adsorption gas molecules. obtained dependencies allow us...
Impedimetric biosensors are used for detecting a wide range of analytes. The detection principle is perspective the development new types analytical devices biomolecular diagnosis diseases. Of particular interest with very high sensitivities, capable trace amounts biomarkers or drugs in biological fluids. possess potential increased sensitivity, since their electrodes can be modified nanostructured materials, zinc oxide. In this work, miniature biosensor an array oxide nanorods synthesized...
In this paper, we present a technique for the synthesis of gas sensitive layers based on zinc oxide nanowires sensitized by colloidal AgInS <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> /ZnS nanocrystals. Zinc were synthesized hydrothermal method. Layers ZnO placed in an aqueous solution nanocrystals 4 hours. Study gas-sensitive properties showed significant increase their response to isopropanol vapors at room temperature compared nanowires.
The development and research of antitumor drugs requires the creation new solutions for personalized medicine, in particular, integrated devices testing effectiveness based on microfluidic systems. Such systems allow rapid assessment small volumes samples both cells supracellular structures, including those taken from real patients. In this work, such a system is implemented basis polymer materials using laser ablation thermal bonding technologies with electrodes. With their help, an...
Zinc oxide nanowires were synthesized by hydrothermal method using cetyltrimethylammonium bromide (CTAB) as a surfactant. Samples of nanwires doped with iodine and bromine also prepared. The influence CTAB doping on the microstructure surface functional composition samples was analyzed X-ray photoelectron spectroscopy scanning electron microscopy. It found that leads to an increase in concentration OH groups zinc nanowires. ZnO nanocrystals grow separately from single center when is added...
Abstract Zinc oxide and zinc stannate nanowires were synthesized by hydrothermal method. doped iodine. The formation of multicomponent oxides was studied X-ray photoelectron spectroscopy. It found that from occurs in 1 hour. percentage OH-groups increases on the surface as a result doping
The results of studying thin polycrystalline perovskite layers CH3NH3PbI3 (MAPbI3) are presented. resulting MAPbI3 demonstrate a characteristic absorption spectrum, optical band gap, and photoresponse to irradiation in the visible region spectrum. Two crystallization mechanisms have been found layer during heating, which ensure formation film crystallites with sizes 100–200 nm long dendritic structures length more than 50 μm. A spacecharge-limited current regime has registered, as well...
Currently, new nanostructured materials based on composite metal oxides are of great interest for the development gas sensors with improved functional characteristics. In this work, zinc oxide nanowires were synthesized by hydrothermal method. Hierarchical ZnO/ZnFe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> O xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> nanostructures obtained immersion layers in ferrous sulphate aqueous...
This article shows the effect of a strong increase in electrical conductivity coating ZnO nanorods when thin dielectric layer aluminum oxide is deposited on their surface. It shown that initial have intrinsic point defects, and deposition affects optical density spectrum nanorods. A associated with inclusion atoms defect crystal lattice near-surface region nanorod its doping. The obtained uniform coatings conducting can be used as nanostructured transparent electrodes for formation bulk...
This work is focused on the study of morphology porous anodic alumina membranes formed in electrolytes based organic and mineral acids. The relationship between synthesis conditions geometric parameters presented. analysis AFM images was performed fractal dimensions samples were determined. electrical characteristics are studied by impedance spectroscopy. A theoretical model described to explain processes oxide layer.