Перегляд за автором "Rozhitskii, M. M."
Зараз показано 1 - 11 з 11
Результатів на сторінку
Варіанти сортування
Публікація Benzo[a]pyrene its influence on human organism and new nanophotonic detection method(Benzo[a]pyrene its influence on human organism and new nanophotonic detection method, 2011) Bilash, О. М.; Galaichenko, О. М.; Sushko, O. A.; Rozhitskii, M. M.Benzo[a]pyrene (BaP) is representative of polycyclic aromatic hydrocarbons (PAHs) family, the substance of the first hazard class. In an environmental, BaP accumulates mainly in a soil and less in a water. It comes from soil to plants and human tissues and continues to move on in the food chain in living organisms where at each stage the BaP concentration is increasing sufficiently. To human organism BaP can come through skin, respiratory organs, digestive system and transplacental infections. Besides that BaP is the most typical chemical carcinogen in environmental, it is dangerous to humans even at low concentrations, since its metabolites are mutagenic and highly carcinogenic and has the property for bioaccumulation. Being chemically relatively stable, BaP can migrate for a long time from one object to another. As a result, many objects and process in the environmental objects which do not have the ability to synthesize the BaP, are the secondary sources of its production. Content control of BaP in environmental can be accomplished by different assay among which the most wide-spread is liquid chromatography. Known methods possess both positive and negative characteristics the last are connected with assay complexity, not allowing of their used in a field conditions, duration, high cost. So new technologies especially based on nanotechnologies and nanomaterials are in great demand both for BaP and other hazardous organic PAHs compounds. Having in mind that BaP as most of PAH has high fluorescence yield in visible spectrum and is capable to emit electrogenerated chemiluminescence (ECL), it is quite possible to use this well-known assay method for both direct and indirect definition [1]. At the same time mentioned ECL methods of BaP definition provide not enough low limit of detection (LOD). Using luminescent nanomaterials such as semiconductor quantum dots (SCQD) as highly efficient detector elements in appropriate nanophotonic sensor can provide assay for BaP detection in surrounding objects water in the first turn with rather low LOD (10 nmol/l). The proposed combined photonic (electrochemiluminescent), nanotechnology (sensor’s electrode modification) and electrochemical (analytical signal excitation) techniques are possessing a number of advantages which are discussed in the given paper.Публікація Investigation of a nanophotonic sensor with electrode modified by semiconductor quantum dots(Journal of Nano- and Electronic Physics, 2014) Sushko, O. A.; Rozhitskii, M. M.This paper focuses on optical sensors, namely nanophotonic ones intended for liquid media contained polynuclear aromatics assay. Developed by us nanophotonic sensor includes optically transparent working electrode modified by quantum-dimensional structures such as spherical semiconductor quantum dots (QDs). Monomolecular layer of QDs is plotted onto the electrode by Langmuir-Blodgett technology. Particular attention is paid to the processes of assay in nanophotonic sensor. As an analyte we used polycyclic aromatic hydrocarbon (PAH) such as benzo[a]pyrene (BP), which is known for its carcinogenic properties. The developed nanophotonic sensor can be used in ecology for organic carcinogens detection in water objects of environment as well as for biomedical, physical chemical assays and some others.Публікація Nanophotonic method and sensor for polycyclic aromatic hydrocarbons detection(ECL 2014, 2014) Sushko, O. A.; Bilash, О. М.; Rozhitskii, M. M.Anthropogenic pollution of environmental water is a huge problem for humanity today as it leads to an increase of incurable diseases. For example, the penetration into the organism of organic carcinogens such as polycyclic aromatic hydrocarbons (PAHs) can lead to the development of cancer tumors. Among PAHs the most dangerous is 3,4-benzopyrene (BP). There are a number of analytical methods for BP detection such as chromatographic, immuno-chemical, spectroscopic, luminescent and biological methods. But these methods beside their advantages have a number of significant shortcomings such as high detection limit (immuno-chemical and biological method), insufficient selectivity of PAHs detection, complexity and duration of sample preparation and analysis, high cost of device. Therefore development of new methods and tools for PAHs detecting using modern nanotechnology and nanomaterials remains urgent. So this work is devoted to the development of nanophotonic method and sensor device construction for the PAH in particular BP detection in water environment objects. Nanomaterials such as spherical quantum dots (QDs) are perspective object of nanophotonics can be used for development of optical sensors as sensor’s detector elements. They have a high luminescence quantum yield, possibility of optical and non-optical excitation, narrow luminescence spectrum and its wavelength dependence on the QDs diameter, high selectivity. This defined the perspective of their use instead of the well known organic luminophores.Публікація Nanophotonic method for polycyclic aromatic hydrocarbons detection in water(ISE, 2012) Sushko, O. A.; Bilash, О. М.; Rozhitskii, M. M.Polycyclic aromatic hydrocarbons (PAHs) are the widespread environmental contaminants that can be found in atmosphere, water, soil, sediment and organisms. Among most dangerous PAHs is benzo[a]pyrene (BP). The effects of BP on health are: short-term when people are exposed to it at levels above the maximum contaminant level (MCL) (0.2 ppm) for relatively short periods of time leading to red blood cells damage, anemia ect; suppression of immune system and long-term, when human beings are exposured do BP influence at levels above the MCL namely effects on reproducibility and high probability of cancer illnesses. There are known methods for PAHs detection, such as chromatography, immuno-chemistry, biological and chemical ones. However, they have several disadvantages, including high cost, duration and complexity of the analysis procedure, the high detection limit and low selectivity. So at present a development of a new method of PAHs detection based on modern technologies and materials such as nanotechologies and nanomaterials. Belonging to above mentioned is nanophotonic method of PAHs assay. Nanophotonic method for PAHs detection in particular BP in water is a combination of electrochemical and electrochemiluminescence analysis with the application of nanomaterials and nanotechnologies. This method can be carried out using nanophotonic sensor based on nanomaterials such as semiconductor quantum dots (QDs).Публікація Nanophotonic method for polycyclic aromatic hydrocarbons detection in water solutions(Eurosvit, 2013) Sushko, O. A.; Bilash, О. М.; Rozhitskii, M. M.Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental agents commonly believed to contribute significantly to human cancer pathologies. One of the most dangerous organic PAHs carcinogens is benzo[a]pyrene (BP). Like many other carcinogens, PAHs are metabolized enzymatically to various metabolites, some of which are highly reaction active. Proposed nanophotonic analytical method is based on the process of QDs transfer to ionic forms in an EC process and their subsequent reactions with oppositely charged ionic forms of the analyte – PAHs (BP) inside ECL cell, resulting in the formation of emitter and emission of an analytical optical signal.Публікація Nanophotonic method of organic carcinogens detection in water objects(Technische Universität Ilmenau, 2012) Sushko, O. A.; Bilash, О. М.; Rozhitskii, M. M.Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental agents commonly believed to contribute significantly to human cancers pathologies. PAHs are formed in the process of incomplete combustion of organic material and are found widely in the environment, for example, in water, food, soil etc. so human exposure to PAHs is unavoidable. Like many other carcinogens, polycyclic aromatic hydrocarbons are metabolized enzymatically to various metabolites, of which some are highly reaction active. One of the most dangerous organic PAHs carcinogens is benzo[a]pyrene (BP). There are known methods for PAHs detection in water objects, such as chromatography, immuno-chemical, biological and chemical ones. However, they have several disadvantages, including high cost, duration and complexity of the analysis procedure, high detection limit, low selectivity and some others. So at present a development of new methods of PAHs detection based on modern technologies and materials such as nanotechologies and nanomaterials is a rather relevant and important task.Публікація Nanophotonic sensors for biomedical and ecological application(B. Verkin Institute of Low Temperature Physics and Engineering, NASU., 2013) Rozhitskii, M. M.; Sushko, O. A.There is an ever-increasing need to enhance the capability of sensor technology for health, structural and environmental monitoring. One area of great concern is new strains of microbial organism and the spread of infectious diseases that requires rapid identification and detection in vivo and in vitro. Another area of major concern, worldwide, is the threat of chemical and biological terrorism. This points out onto necessity of improovement of existing and development of novel detection technologies based on nanomaterials. Nanophotonics-based sensors utilizing nanostructured multiple probes provide the ability for simultaneous detection of different biomedical and ecological objects as well as the ability for remote sensing where necessary. A useful future approach can utilize nanoscale optoelectronics with hybrid detection methods involving both photonics and electronics.Публікація New nanophotonic detection method of benzo[a]pyrene(КНУ імені Тараса Шевченка, 2011) Bilash, О. М.; Galaichenko, О. М.; Sushko, O. A.; Rozhitskii, M. M.Benzo[a]pyrene is the representative of polycyclic aromatic hydrocarbons family, the substance of the first hazard class. In present work for the development of novel nanophotonic assay method as a PAH representative benzo[a]pyrene was choose.Публікація Physics [Text], Part 1. Mechanics, Thermodynamics, Vibration and Waves, Electricity and Nagnetism: Summary of Letures.(SMIT, 2005) Rozhitskii, M. M.; Churilov, O.; Горбачев, В. А.; Zholudov, Yu.Публікація Physics [Text], Part 2. Electric Circuits, Optics and Quantum Mechanics: Summary of Letures(SMIT, 2006) Rozhitskii, M. M.; Churilov, O.; Zholudov, Yu.; Горбачев, В. А.Публікація Sensor based on semiconductor nanostructures for polycyclic aromatic hydrocarbons detection in water objects(ISE, 2013) Sushko, O. A.; Rozhitskii, M. M.Every year in the world's water basins fall thousands of chemicals with unpredictable effects, many of them are hazardous for human being among which are polycyclic aromatic hydrocarbons (PAHs). That is why their detection and content monitoring are quite important Modern methods and means for the determination of PAH have several disadvantages such as high detection limit, low selectivity, long duration and complexity of the analysis procedure. The work sensor based on semiconductor nanostructures avoiding of these disadvantages is described.