8 research outputs found
The Orthodox civilization? Genesis of Russian political religion through the prism of civilizational analysis
Thesis "The Orthodox civilization? Genesis of Russian political religion through the prism of civilizational analysis" has a historico-theoretical character. It presents an analysis of origins and evolution of two most important Russian ideologies which were expressed in religious terms. Using the civilizational perspective and by reconstructing of factual and mental context of two Russian ideologies, this thesis polemizes with religious determinant of Russian civilization. Instead, it establishes an issue of religio-political nexus, which seems to be more successful for thinking about civilizational specifics of Russia. Powered by TCPDF (www.tcpdf.org)Diplomová práce historicko-teoretické povahy na téma Pravoslavná civilizace? Geneze ruského politického náboženství prizmatem civilizační analýzy představuje rozbor kontextu, z něhož vznikly dvě nejvýznamnější ruské ideologie, které byly vymezeny v náboženských termínech. Historická rekonstrukce faktického a myšlenkového pozadí dvou ruských ideologií, založená na teoretických východiskách civilizační analýzy, zpochybňuje vizi náboženské determinanty ruské civilizace. Místo toho nastoluje problematiku tzv. nábožensko-politického nexu, který se jeví být výstižnějším konstruktem pro posuzování civilizačních specifik Ruska. Powered by TCPDF (www.tcpdf.org)Department of Historical SociologyPracoviště Historické sociologieFaculty of HumanitiesFakulta humanitních studi
The Orthodox civilization? Genesis of Russian political religion through the prism of civilizational analysis
Thesis "The Orthodox civilization? Genesis of Russian political religion through the prism of civilizational analysis" has a historico-theoretical character. It presents an analysis of origins and evolution of two most important Russian ideologies which were expressed in religious terms. Using the civilizational perspective and by reconstructing of factual and mental context of two Russian ideologies, this thesis polemizes with religious determinant of Russian civilization. Instead, it establishes an issue of religio-political nexus, which seems to be more successful for thinking about civilizational specifics of Russia. Powered by TCPDF (www.tcpdf.org
A Transfer to More Civilized Manners of Conduct: The Issue of Applicability of N. Elias's Concepts to Russian Cases
Studium humanitní vzdělanosti - Historický modulLiberal Arts and Humanities - Historical ModuleFaculty of HumanitiesFakulta humanitních studi
Laser modification of structure and optical properties of N-doped graphene oxide
The effect of laser ablation of N-doped graphene oxide (NGO) sheets on its optical properties has been studied. It was shown that the average lateral size of NGO sheets was decreased from 644.4 ± 143.8 to 114.4 ± 59.8 nm after 60 min of ablation. The data of FTIR spectroscopy have shown that after ablation the intensity of the vibrations bands of N-containing groups increases. The optical density of NGO dispersions and the intensity of their emission are depended on the ablation time. The highest fluorescence intensity was recorded upon excitation at a wavelength of 350 nm. For all NGO samples after laser irradiation a noticeable increase in the fluorescence intensity was registered. The enhancement factor was equal to ∼11.0 and 8.5 times for 30 and 60 min, respectively. The lifetime of NGO fluorescence after ablation was increased from 1.73 ns to 3.63 ns. After ablation, the samples under study exhibit long-term luminescence with a maximum at about 450 nm. The data obtained open up possibilities to control the optical properties of N-doped graphene oxide and nanodots based on it
Sensitiztion of TiO2 by merocyanine dye in the prescence of plasmon nanoparticles
Currently, an active search and study of non-metal organic luminophores for dye-sensitized solar cells
is peformed. Merocyanine dyes are characterized by high bipolarity, narrow selective absorption bands, high
absorption cross sections (extinctions) and high photochemical stability.
In present work we have studied the effect of Ag nanoparticles (NPs) on the sensitization of a TiO2
film by merocyanine dye. For this purposes dye was adsorbed onto porous TiO2 films with the addition of
Ag/TiO2 core-shell nanostructures at a concentration of 0, 0.5, 1, and 2 wt%. These nanostructures consist of a
core – Ag nanoparticles (20 nm in diameter) and a TiO2 shell with a thickness of 4 nm. These TiO2 films were
used both for spectral-luminescence measurements and for DSSC assembling according to a standard
technique.
The absorption spectrum of merocyanine is located in the region of 500 – 650 nm with a maximum at
590 nm, the fluorescence band is centered at 630 nm. The measurements showed that the addition of Ag/TiO2
NPs does not affect on the shape and position of the absorption and fluorescence bands of the dye. In the
presence of plasmonic NPs, a 30% increase in the fluorescence intensity of the dye was recorded. The
fluorescence lifetime of the dye practically does not change in the presence of Ag/TiO2 NPs.
The current–voltage characteristics (CVC) of solar cells were measured under the illumination with a
Xe lamp with a power of 100 mW/cm2
. The merocyanine dye has the following photovoltaic parameters:
Isc=0.18 mA/cm2, Voc=355 mV, FF=0.33, η=0.21%. The addition of Ag/TiO2 NPs doubles the efficiency of
the DSSC sensitized with a merocyanine dye and Isc=0.6 mA/cm2
, Voc=373 mV, FF=0.20, η=0.43%. The data
on the spectral sensitivity of DSSC show that the addition of Ag/TiO2 NPs results in the growth in the spectral
sensitivity of the solar cell in the absorption band of the dye. At the same time, absorption of plasmonic Ag
NPs was recorded in the region of 420 nm. Thus, the combinatioin of the growth of fluorescence and spectral
sensitivity of solar cells with Ag/TiO2 NPs leads to an increase in the efficiency of the generation of charge
carriers in a semiconductor sensitized by the investigated merocyanine
Получение и исследование свойств диспергированного оксида графена
В данной работе изучена способность оксида графена формировать стабильные дисперсии в органических растворителях. Показано, что обработка растворов графена ультразвуком приводит к уменьшению размеров частиц. Была исследована стабильность приготовленных дисперсий графена при измерении распределения числа частиц от их размеров и по изменению оптической плотности растворов во времени. Выяснено, что в тетрагидрофуране и диметилформамиде оксид графена формирует более стабильные дисперсии, чем в хлороформе и ацетоне
Bioinspired study of energy and electron transfer in photovoltaic system
This study focuses on understanding the fundamentals of energy transfer and electron transport in photovoltaic devices with uniquely designed nanostructures by analysing energy transfer in purple photosynthetic bacteria using dye-sensitised solar cell systems. Förster resonance energy transfer between the xanthene dye (donor of energy) and a new polymethine dye (acceptor of energy) was studied in dye-sensitised solar cells, which leads to a doubling of energy conversion efficiency in comparison to the cell with only the polymethine dye. The electron transport in the two different nanostructures of zinc oxide (nanorods and nanosheets) was investigated by spectroscopic methods (UV-vis spectrometer, time-resolved photoluminescence spectroscopy) and electrochemical potentiostat methods. The nanosheet structure of zinc oxide showed high short circuit current and long diffusion length. This fundamental study will lead to efficient artificial photosystem designs
Bioinspired study of energy and electron transfer in photovoltaic system
<p>This study focuses on understanding the fundamentals of energy transfer and electron transport in photovoltaic devices with uniquely designed nanostructures by analysing energy transfer in purple photosynthetic bacteria using dye-sensitised solar cell systems. Förster resonance energy transfer between the xanthene dye (donor of energy) and a new polymethine dye (acceptor of energy) was studied in dye-sensitised solar cells, which leads to a doubling of energy conversion efficiency in comparison to the cell with only the polymethine dye. The electron transport in the two different nanostructures of zinc oxide (nanorods and nanosheets) was investigated by spectroscopic methods (UV-vis spectrometer, time-resolved photoluminescence spectroscopy) and electrochemical potentiostat methods. The nanosheet structure of zinc oxide showed high short circuit current and long diffusion length. This fundamental study will lead to efficient artificial photosystem designs.</p