A5030597729- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Nanowire Synthesis and Applications
- Ga2O3 and related materials
- Silicon Nanostructures and Photoluminescence
- Transition Metal Oxide Nanomaterials
- Advanced Memory and Neural Computing
- Surface Roughness and Optical Measurements
- Photonic and Optical Devices
Satbayev University
2022-2024
Institute of Physics and Technology
2023-2024
The formation of structures different sizes on the surface a single sample and study mechanisms their excitations energy transitions is promising area research. ZnO/SiO2/Si heterostructures were formed by two-stage electrochemical etching silicon wafers synthesizing zinc oxide nanoparticles using sol-gel technology. By scanning electron atomic force microscopies, various pores clusters identified. presence five levels hierarchy provided synthesis light-emitting particles with properties....
The stability of structures to various influences determines the effectiveness sensors that are based on them. A modified method metal-stimulated electrochemical etching and hydrothermal made it possible synthesize combined structure silicon nanowires ZnO crystallites. hexagonal zinc oxide crystallites was determined by X-ray diffraction method. Several causes radiative recombination have been identified in photoluminescence spectra, their nature is associated with defective oxide. Electron...
The development of devices combining optical and electrical functions based on silicon-containing materials is one the challenges in microelectronics. By plasma enhanced chemical vapor deposition synthesis subsequent annealing, silicon nitride samples with both excess nitrogen were formed. high concentration Si-H N-H bonds was determined by Raman spectroscopy before annealing. transmission electron microscopy, it that addition to nitride, clusters formed sample’s matrix. photoluminescence...
A hierarchical surface that includes objects with different sizes, as a result of creating local fields, initiates large number effects. Micropores in the composition macropores, well nanoclusters substance, were detected by scanning electron and atomic force microscopies on ZnO/Por-Si samples. An identical fractal dimension for all levels hierarchy was determined these structures, which is associated same response to external excitation. Photoluminescence studies have shown presence...
Abstract Determining the features of formation hierarchical structures based on interactions elementary particles is a promising area research. The deposition 20 and 25 layers zinc oxide by spray pyrolysis Si surface with stepped porosity led to ZnO various sizes. X-ray fluorescence spectroscopy revealed zinc-containing compounds in thin formed layers. maximum photoluminescence intensity peaks characteristic nanosized were found for sample film mechanism nanocrystal includes capture charges...
Thin films of tin oxide and composite systems based on them have found the greatest applications in solar energy. The properties oxides depend obtaining technology following processes. choice optimal solution maturation time influences functional films. In this research, solutions with adding different volume concentrated aqueous ammonia (NH4OH) per 100 ml system were prepared: 0.8 (pH=1.40), (pH=1.46) 1.6 (pH=1.49). This enabled study obtained from acidity. resistance was measured 10 parts...