RESEARCH OF THE MAIN COMPONENTS OF INNOVATIVE CAPACITY OF THE INDUSTRIAL ENTERPRISE

The available methodological base of research of innovative capacity of the industrial enterprise is developed, methods definitions and measurements of innovative potential are given. It allowed to offer approach to adoption of administrative decisions in the field of a choice of a certain type of innovations depending on the level of innovative capacity of the enterprise

RESEARCH OF THE MAIN COMPONENTS OF INNOVATIVE CAPACITY OF THE INDUSTRIAL ENTERPRISE

The available methodological base of research of innovative capacity of the industrial enterprise is developed, methods definitions and measurements of innovative potential are given. It allowed to offer approach to adoption of administrative decisions in the field of a choice of a certain type of innovations depending on the level of innovative capacity of the enterprise

Study of Lead-Free Perovskite Solar Cells at Elevated Temperatures and UV Irradiatio

In the present work, the change of the electrical performance is investigated for two lead-free perovskite materials with novel iodide- based and bromide-based compositions under different exploitation conditions, such as light-induced stress, elevated temperatures and ultraviolet light exposure. The charge transport properties are studied in more detail by spectroscopic methods for the cell with the iodide layer due to its greater stability, aiming to understand the degradation mechanism. The results show that this perovskite exhibited excellent stability at UV exposure and acceptable stability at continuous illumination at 600 nm. The device is stable up to 55 °C, when the photovoltage drops. Beyond this threshold temperature, a phase change transition occurs related to traps formation and charge carriers escaping, which affects the photovoltage and it slightly increases

Effect of anodizing regimes on the volume expansion factor of the oxide films

The volume expansion factor of porous alumina, formed by through anodizing of an Al foil in ox- alic and sulphuric acid has been studied. The thickness of obtained porous alumina films was measured by a mechanical profilometer with a computer signal processing. The volume expansion factor of porous alumina varied from 1.35 to 1.65. Linear dependences were obtained for the vol- ume expansion factor of porous alumina versus the anodizing voltage and the ionic current density logarithm versus the inverse volume expansion factor. Unlike oxide formation in sulphuric acid, these dependences have two subsequential rectilinear regions in oxalic acid

Features of the porous morphology of anodic alumina films at the initial stage of disordered growth

A characteristic feature of disordered porous anodic film growth at the initial stage of aluminum anodizing was revealed by varying the electrolyte type and anodizing voltage. The samples were obtained by the electrochemical oxidation of thin aluminum films (100 nm thick) on SiO2/Si substrates in a 0.3 M oxalic acid at 10–50 V and were studied by SEM. The ImageJ analysis of the images revealed the simultaneous development of two large groups of pores: major pores with a large diameter and minor pores with a smaller diameter. When anodizing in oxalic acid at 10–50 V, it has been shown that the ratio of the diameters of the major and minor pores remains constant and is about 1.17. Using a geometric model, we demonstrated that the centers of the minor pores are located inside the elementary hexagonal cell formed by the centers of the major pores. Moreover, our results are very close to the theoretical value of 2/√3. At the initial stage of disordered pore growth, the development of minor pores rather than major pores is not a random process and is determined by energy-efficient conditions for the development of pores inside the hexagonal cells formed by the major pores. The increase in compressive mechanical stress in the anodic film leads to an interruption in the development of such pores

Recognitionand Analysis of Microstructure Parameters of Porous Anodic Films Using ImageJ

The most important parameters that characterize the microstructure of the films and determine the possibility of their use as porous templates are the pore diameter, porosity, and ordering of the porous structure. Therefore, to increase the efficiency of the use of porous anodic alumina films, it is important to investigate the effect of the formation modes on the microstructure. The aim of this work was to choose and optimize a model for processing experimental data obtained by scanning electron microscopy in the ImageJ to determine the parameters of the microstructure of porous films. The work shows the result of SEMimage analysis and obtains plots of pore diameter distribution by size and determines the diameter of the main pores

Applying Aniline for P-doping of PEDOT:PSS Films to Improve Their Conductivity and Efficiency of Perovskite Solar Cells

Poly(3,4- ethylenedioxythiophene):polystyrene sulfonate (PEDOT: PSS) is responsible for hole extraction efficiency and hole transport in the perovskite solar cell structure. The inclusion of PSS reduces the conductivity of the PEDOT films, which inhibits hole transport and results in a low photo current of the perovskite solar cell. In this work, an aniline solution was used as an additive in the PEDOT: PSS thin film to increase electrical conductivity. Two different methods were used to incorporate the additive: surface and volume treatment. The results show that the surface treatment with aniline solution can significantly increase the conductivity of PEDOT: PSS film. Moreover, the photoconversion efficiency of the perovskite solar cell with such a PEDOT: PSS layer is increased 1.5 times compared to the untreated one

Stored charge and its influence on properties of anodic alumina films

In porous and barrier-type anodic alumina films, the stored charge has electronic nature and it plays a significant role in the process of aluminum anodizing. The charge stored can modify the distribution of local field generated by a voltage applied and thus it can affect the oxide growth. The method for the investigation of thermally activated defects in anodic alumina films by reanodizing technique was also described. It was applied for computation of activation energy of electron traps in barrier layer for sulfuric and oxalic acid alumina films and concentration of the traps

Effect of anodic oxygen evolution on cell morphology of sulfuric acid anodic alumina films

The purpose of this work was to study and analyze the effect of electrolyte temperature and anodization voltage on cell morphology of thin films of sulfuric acid anodic alumina formed on substrates of different nature, such as SiO2/Si, glass-ceramic, glass substrates, and polished aluminum. The data obtained demonstrated that the thermal conductivity of the substrate in the voltage range from 12 to 14 V affected a pore diameter (dpore) in anodic films. Depending on the substrate type, dpore increased in the following order: glass > glass- ceramic > SiO2/Si > aluminum. It was found that the anodizing voltage (Ua) of 16 V was a turning point for anodic films obtained in sulfuric acid after which the slope of the lines for both dpore and Dinter (interpore distance) vs. Ua changed. This behavior might be explained by the occurrence of the overpotential enough for the beginning of the oxygen evolution reaction. We assumed that the oxygen evolution on aluminum oxide surface at the pore bottom at Ua> 16 V results in an increase in acid concentration in the solution and, consequently, in rise in acidic nature of the electrolyte and increase in the dissolution rate of the oxide layer of pore walls

Novel Electrochemical Aptasensor Based on Ordered Mesoporous Carbon/2D Ti3C2 MXene as Nanocarrier for Simultaneous Detection of Aminoglycoside Antibiotics in Milk

Herein, a novel electrochemical aptasensor using a broad-spectrum aptamer as a biorecognition element was constructed based on a screen-printed carbon electrode (SPCE) for simultaneous detection of aminoglycoside antibiotics (AAs). The ordered mesoporous carbon (OMC) was firstly modified on 2D Ti3C2 MXene. The addition of OMC not only effectively improved the stability of the aptasensor, but also prevented the stacking of Ti3C2 sheets, which formed a good current passage for signal amplification. The prepared OMC@Ti3C2 MXene functioned as a nanocarrier to accommodate considerable aptamers. In the presence of AAs, the transport of electron charge on SPCE surface was influenced by the bio-chemical reactions of the aptamer and AAs, generating a significant decline in the differential pulse voltammetry (DPV) signals. The proposed aptasensor presented a wide linear range and the detection limit was 3.51 nM. Moreover, the aptasensor, with satisfactory stability, reproducibility and specificity, was successfully employed to detect the multi-residuals of AAs in milk. This work provided a novel strategy for monitoring AAs in milk