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Aplikace environmentální rastrovací elektronové mikroskopie (EREM) v oboru analýzy miniatur: metodika pro specifické použití ve výzkumu miniaturního malířství
Hradil, David; Hradilová, J.; Neděla, Vilém; Tihlaříková, Eva
2022 - Czech
Metodika se zabývá zcela novým, nepoužívaným postupem neinvazivní analýzy malovaných portrétních miniatur, a to environmentálním rastrovacím elektronovým mikroskopem s energiově-disperzním rtg. spektrometrem (EREM-EDS). EREM na rozdíl od klasického rastrovacího elektronového mikroskopu (REM) umožňuje analyzovat malbu na slonovině, což není možné v prostředí vakua nebo nízkých tlaků plynů, kde hrozí riziko deformací a poškození vlivem vysoušení tohoto biologického materiálu. Metodika je rozdělená na dvě části – první popisuje studium morfologických detailů při velkém zvětšení (např. možnost rozlišení různých druhů biologických podložek), druhá pak provedení prvkové analýzy ve vysokém prostorovém rozlišení. The methodology deals with a completely new, unused procedure of non-invasive analysis of painted portrait miniatures, namely an environmental scanning electron microscope with energy-dispersive X-rays. spectrometer(EREM-EDS). EREM, unlike the conventional scanning electron microscope (REM), allows the analysis of ivory painting, which is not possible in a vacuum or low gas pressure environment, where there is a risk of deformation and damagedue to drying of this biological material. The methodology is divided into two parts - the first describes the study of morphological details at high magnification (eg. the possibility of distinguishing different types of biological substrates), the second is the implementation of elemental analysis in high spatial resolution. Keywords: environmental scanning electron microscopy; non-invasive analysis; portrait miniature; EDS analysis; ivory Available at various institutes of the ASCR
Aplikace environmentální rastrovací elektronové mikroskopie (EREM) v oboru analýzy miniatur: metodika pro specifické použití ve výzkumu miniaturního malířství

Metodika se zabývá zcela novým, nepoužívaným postupem neinvazivní analýzy malovaných portrétních miniatur, a to environmentálním rastrovacím elektronovým mikroskopem s energiově-disperzním rtg. ...

Hradil, David; Hradilová, J.; Neděla, Vilém; Tihlaříková, Eva
Ústav anorganické chemie, 2022

Plasmon-mediated electrocatalytic activity of TiB2 towards water splitting
Buravets, V.; Zabelina, A.; Miliutina, E.; Popelková, Daniela; Henych, J.; Šťastný, Martin; Švorčík, V.; Lyutakov, O.
2022 - English
Environmental problems related to the economy based on fossil fuels are of paramount importance. However, transition to renewable energy sources is restrained by the availability of storage technologies. Electrochemistry is a widely recognized prominent tool to achieve this goal by converting renewable energy into the form of chemical bonds accessible further as fuels, such as hydrogen produced by water splitting. Crucial losses in such process are caused by the high overpotentials, required for water splitting as a hydrogen source. To achieve required efficiency of water splitting appropriate catalysts have to be found with the suitable combination of activity, stability and cost. Nano-structured, two-dimensional materials (2D) are attractive candidates due possessing many of the desired properties and highly tunable characteristics. Employing light allows additional degree of freedom to boost conventional photo-electrocatalysis, in particular plasmonmediated electrocatalysis. Enhancement of the catalytic activity can be increased even further if the catalytic system absorbs wide range of light spectrum. In this study, we combine plasmon-active Au grating with 2D flakes of TiB2, to perform plasmon-mediated water splitting half-reaction – hydrogen evolution. Keywords: hydrogen; evolution, photo-electrocatalysis; plasmonics; 2D materials Available in digital repository of the ASCR
Plasmon-mediated electrocatalytic activity of TiB2 towards water splitting

Environmental problems related to the economy based on fossil fuels are of paramount importance. However, transition to renewable energy sources is restrained by the availability of storage ...

Buravets, V.; Zabelina, A.; Miliutina, E.; Popelková, Daniela; Henych, J.; Šťastný, Martin; Švorčík, V.; Lyutakov, O.
Ústav anorganické chemie, 2022

Speciální betony V
Černý, Zbyněk; Plocek, Jiří; Rosypal, Pavlína
2021 - Czech
Předmětem daného výzkumu byly speciální betony pro obalové soubory. The subject of the research was special concrete for packaging files. Keywords: special concretes Available at various institutes of the ASCR
Speciální betony V

Předmětem daného výzkumu byly speciální betony pro obalové soubory.


The subject of the research was special concrete for packaging files.

Černý, Zbyněk; Plocek, Jiří; Rosypal, Pavlína
Ústav anorganické chemie, 2021

Lead soaps in paintings: symptoms and the role of humidity
Garrappa, Silvia; Švarcová, Silvie; Kočí, Eva; Hradilová, J.; Bezdička, Petr; Hradil, David
2020 - English
In this study, an overview of the symptoms of lead soaps reported in artworks in combination\nwith the study of the role of humidity on the formation of these degradation products have\nbeen thoroughly investigated. The use of optical microscopy, scanning electron microscopy\n(SEM) in combination with Fourier-transform infrared spectroscopy (FTIR) proved to be an\nefficient analytical approach to highlight both the saponified area of artworks’ samples and the\nformation of metal carboxylates within mock-up model systems. Optical microscopy revealed\nto be very useful for the first screening of samples embedded in resin, while SEM helped in\nthe detection and distribution of elements within the cross-sections. On the other hand, FTIR\nmicroscope proved to be a very powerful instrument for high-resolution point measurements\nperformed in the attenuated total reflection mode (ATR) mode with mercury-cadmium-telluride\n(MCT) detector, as well as for chemical imaging of larger area of both artworks’ and mock-up\nsamples performed in the ATR mode with focal plane arrays (FPA) detector. This study provides\nnew useful insights contributing to better understanding of factors affecting the paints‘ stability,\nwhich is neccesary for developing new efficient strategies for preservation and restoration of\nfatty-based painted artworks. Keywords: lead soaps; paintings; oil; egg yolk; humidity Available at various institutes of the ASCR
Lead soaps in paintings: symptoms and the role of humidity

In this study, an overview of the symptoms of lead soaps reported in artworks in combination\nwith the study of the role of humidity on the formation of these degradation products have\nbeen ...

Garrappa, Silvia; Švarcová, Silvie; Kočí, Eva; Hradilová, J.; Bezdička, Petr; Hradil, David
Ústav anorganické chemie, 2020

Speciální betony IV
Černý, Zbyněk
2020 - Czech
Předmětem daného výzkumu byly speciální betony pro obalové soubory The subject of the research was special concrete for packaging files. Keywords: inorganic materials; special concretes Available at various institutes of the ASCR
Speciální betony IV

Předmětem daného výzkumu byly speciální betony pro obalové soubory


The subject of the research was special concrete for packaging files.

Černý, Zbyněk
Ústav anorganické chemie, 2020

Nové anorganické materiály stínící ionizující záření IV
Černý, Zbyněk
2020 - Czech
Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření. Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding. Keywords: inorganic materials; absorbents and moderators of neutrons; ionizing radiation Available at various institutes of the ASCR
Nové anorganické materiály stínící ionizující záření IV

Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření....

Černý, Zbyněk
Ústav anorganické chemie, 2020

Historic paint investigation of the Gierczyn parish church painted decoration in the context of the mining history of the region
Svorová Pawełkowicz, Sylwia; Witkowski, M.; Svora, Petr; Wagner, B.
2020 - English
The painted decoration of the Gierczyn parish church situated in the Izera Mountains was studied in the context of the rich mining history of the region known for tin, copper, and cobalt ores extraction. Smalt and copper pigments identification is discussed in the context of possible provenance studies. The aim is to determine to what extent the decoration of the parish church in Gierczyn reflects the mining history of the region and to verify whether local materials could have been used. Historic paint investigation is supported by chemical analysis of pigments. Additionally, the paper presents results of research combining archival studies of copper and cobalt extraction, and smalt production in nearby Przecznica, and of the parish church which was the main temple for local miners. Keywords: Przecznica (Querbach); Gierczyn (Giehren); mining history; smalt; copper pigments Available at various institutes of the ASCR
Historic paint investigation of the Gierczyn parish church painted decoration in the context of the mining history of the region

The painted decoration of the Gierczyn parish church situated in the Izera Mountains was studied in the context of the rich mining history of the region known for tin, copper, and cobalt ores ...

Svorová Pawełkowicz, Sylwia; Witkowski, M.; Svora, Petr; Wagner, B.
Ústav anorganické chemie, 2020

Nové anorganické materiály stínící ionizující záření III
Černý, Zbyněk
2019 - Czech
Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.\n Laboratory and pilot technologies of new, inorganic, non-flammable and safe materials with high content of moderators for neutron radiation shielding. Keywords: inorganic materials; absorbents and moderators of neutrons; ionizing radiation Available at various institutes of the ASCR
Nové anorganické materiály stínící ionizující záření III

Laboratorní a pilotní technologie nových anorganických nehořlavých a bezpečných materiálů s vysokými obsahy moderátorů neutronů pro stínění neutronového záření.\n...

Černý, Zbyněk
Ústav anorganické chemie, 2019

Speciální betony II
Černý, Zbyněk
2018 - Czech
Předmětem daného výzkumu byly speciální betony pro obalové soubory. The subject of the research was special concrete for packaging files. Keywords: inorganic materials; special concretes Available at various institutes of the ASCR
Speciální betony II

Předmětem daného výzkumu byly speciální betony pro obalové soubory.


The subject of the research was special concrete for packaging files.

Černý, Zbyněk
Ústav anorganické chemie, 2018

Characterization of hydrogenated silicon thin films and diode structures with integrated germanium nanoparticles
Stuchlík, J.; Fajgar, R.; Remeš, Z.; Kupčík, Jaroslav; Stuchlíková, H.
2018 - English
P-I-N diode structures based on the thin films of amorphous hydrogenated silicon (a-Si: H) deposited by Plasma Enhanced Chemical Vapor Deposition (PECVD) technique were prepared with embedded Si and Ge nanoparticles. The Reactive Laser Ablation (RLA) of germanium target was used to cover the intrinsic a-Si: H layer by Ge NPs under a low pressure of the silane. The RLA was performed using focused excimer ArF laser beam under SiH4 background atmosphere. Reaction between ablated Ge NPs and SiH4 led to formation of Ge NPs covered by thin GeSi: H layer. The deposited NPs were covered and stabilized by a-Si: H layer by PECVD. Those two deposition processes were alternated repeatedly. Volt-ampere characteristics of final diode structures were measured in dark and under illumination as well as their electroluminescence spectra. Keywords: PECVD; a-Si: H; PIN diode; Ge; nanoparticles Available at various institutes of the ASCR
Characterization of hydrogenated silicon thin films and diode structures with integrated germanium nanoparticles

P-I-N diode structures based on the thin films of amorphous hydrogenated silicon (a-Si: H) deposited by Plasma Enhanced Chemical Vapor Deposition (PECVD) technique were prepared with embedded Si and ...

Stuchlík, J.; Fajgar, R.; Remeš, Z.; Kupčík, Jaroslav; Stuchlíková, H.
Ústav anorganické chemie, 2018

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