Výsledky vyhledávání

0587258 - ÚVGZ DATA Vědecká data      2024
Vítek, Petr

Ramanova spektra extremofilních řas.
[Raman spectra of extremophile algae.]

Popis: Surová spektroskopická data z programu WIRE 3.X. (1) soubor bodových Ramanových spekter a (2) soubor Ramanovského mapování.
[Raw spectroscopic files from WIRE 3.X software. (1) A set of single Raman spectra, and (2) Raman imaging data file.]
Klíčová slova: Raman * spectroscopy * imaging
Obor OECD: 1. Natural Sciences
DOI: https://doi.org/10.57680/asep.0587258
Handle: https://hdl.handle.net/11104/0354504
Vkladatel: Vítek, Petr
Datum publikování: 27.6.2024
 

0586898 - FZÚ DATA Vědecká data      2024
Remeš, Zdeněk - Babčenko, Oleg - Jarý, Vítězslav - Beranová, Klára

Dataset for Enhanced photoluminescence of plasma treated recycled glass particles.
Verze 2      

Popis: Figure 1. Recycled soda-lime glass powder is a sustainable material that is also often considered as a filler in cement-based composites. The changes in the surface properties of the glass particles due to the treatments were analyzed by X-ray photoelectron spectroscopy (XPS) and optical spectroscopy. We have found, that there is a relatively high level of carbon contamination on the surface of glass particles (around 30 at.%), so plasma technology and thermal annealing were tested for the surface cleaning. Room temperature plasma treatment was not sufficient to remove carbon contamination from the surface of recycled glass particles.
Instead, the room temperature plasma treatment of recycled soda-lime glass particles leads to a significant enhancement of their room temperature photoluminescence (PL) by increasing the intensity and accelerating the decay of the photolu-minescence. The enhanced blue PL after room temperature plasma treatment was attributed to the presence of carbon contamination on the glass surface and associated charge surface and interfacial defects and interfacial states. Therefore, we propose blue photoluminescence under UV LED as a fast and inexpensive method to indicate carbon contamination on the surface of glass particles.

Figure 2. The normalized FTIR absorbance spectra measured in FTIR spectrometer with ATR accessory after low pressure plasma treatment at room temperature (a) and at 500°C (b).

Figure 3. IR Raman spectra measured in FTIR spectrometer with 1064 nm laser excitation after low pressure plasma treatment at room temperature (a) and at 500°C (b).

Figure 4. C 1s (a), and O 1s (b) XPS spectra (from top to bottom) for the “As received” sample, the samples treated in H2, O2, and N2 plasma at room temperature, annealed in H2, O2, and N2 atmosphere at 500°C, and annealed in H2, O2, and N2 plasma at 500°C. Dots represent measured data, black lines results of fits, colored lines fitting components. Peaks shaded by grey originate from carbon-oxygen contamination.

Figure 5. Ratio of selected components derived from fitting XPS spectra. We use following labels for simplification: BO: Si-O-Si bridging oxygen, NBO: Si-O-M non-bridging oxygen, H2O: oxygen from hydrous species bound to silicon (H2O, Si-OH), CO: carbon-oxygen contaminations (C-O(H), C=O, COOH), C: atomic concentration of carbon normalized to 1. The absolute uncertainty was esti-mated to be of ± 0.2 and not included in the graph for better clarity. It should be noted that a sub-stantial portion of the uncertainty is given by a systematic approach of data analysis (same in all cases) resulting in high reliability of data trends.

Figure 6. PL spectra of treated glass powder oxygen plasma. “RT plasma”, resp. “500°C plasma” represents the PL spectra measured after room temperature, resp. 500°C O2 plasma treatment, The PL spectra of as received and annealed at 500°C in O2 atmosphere (no plasma) glass powder were added for comparison.

Figure 7. PL spectra of room temperature H2 plasma treated glass powder using sinusoidal UV LED excitation at frequency of 100 kHz (a). The curve with error bars corresponds to the spectrally re-solved mean PL decay time τ calculated from the phase shift between the excitation and the emis-sion spectra. The time resolved PL emission measured by TCSPC at 450 nm is shown in (b). The instrumental response function measured at the excitation pulse wavelength (excitation pulse shape) and fitted curve were added for comparison. All measurements were done at RT.

Popis změny dat: A .tif file called Figure 1 was added to the dataset.
Klíčová slova: recycling * silicon dioxide * glass * plasma * annealing * photoluminescence * Raman spectroscopy * X-ray photoelectron spectroscopy
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
DOI: https://doi.org/10.57680/asep.0586898
Handle: https://hdl.handle.net/11104/0354272
Vkladatel: admin
Datum publikování: 18.6.2024
 

0586870 - FZÚ DATA Vědecká data      2024
Neshat, A. - Mobarakeh, A.M. - Yousefshahi, M.R. - Varmaghani, F. - Dušek, Michal - Eigner, Václav - Kučeráková, Monika

Crystallographic_data_with_embedded_Jana2020_files.

Popis: The file is related to the manuscript „Introducing Novel Redox-Active Bis(phenolate) N‑Heterocyclic
Carbene Proligands: Investigation of Their Coordination to Fe(II)/Fe(III) and Their Catalytic Activity in Transfer Hydrogenation of Carbonyl Compounds“ and is given in the CIF format, which applies to crystallographic data. The file contains embedded files of the Jana2020 software (freely available at http://jana.fzu.cz), which can be used to reproduce all crystallographic results of the manuscript.

Klíčová slova: Carbene bisphenolate ligands * pincer proligands * synthesis * spectroscopy * crystal structure * jana2020
Obor OECD: Mineralogy
DOI: https://doi.org/10.57680/asep.0586870
Handle: https://hdl.handle.net/11104/0354245
Vkladatel: admin
Datum publikování: 17.6.2024
 
Publikace ASEP:
Introducing novel redox-active bis(phenolate) N-heterocyclic carbene proligands: investigation of their coordination to Fe(II)/Fe(III) and their catalytic activity in transfer hydrogenation of carbonyl compounds

0586665 - ÚVGZ DATA Vědecká data      2024
Stojanović, Marko - Jocher, Georg - Kowalska, Natalia - Szatniewska, Justyna - Zavadilová, Ina - Urban, Otmar - Čáslavský, Josef - Horáček, Petr - Acosta, Manuel - Pavelka, Marian - Marshall, John D.

Soubor primárních dat izotopového složení floémové mízy, jejího toku v dřevinách a hrubé primární produkce smíšeného listnatého lesa.
[Datasets on phloem sap carbon isotope ratio, sap flow in tree species, and gross primary production in a mixed broadleaf forest.]

Popis: V rámci tohoto dokumentu jsou zpřístupněny primární datové soubory poměru stabilních izotopů uhlíku v míze a toku floémové mízy (sap flow) u dominantních dřevin smíšeného listnatého lesa (Quercus robur, Fraxinus angustifolia a Carpinus betulus). Dále jsou prezentovány denní sumy hrubé primární produkce ekosystému smíšeného listnatého lesa, odhadnuté pomocí techniky eddy kovariance. Tyto datové soubory obsahují primární hodnoty použité v publikaci Stojanović et al. (2024), s názvem „Disaggregation of Canopy Photosynthesis Among Tree Species in a Mixed Broadleaf Forest“, publikované v časopise Tree Physiology (DOI: 10.1093/treephys/tpae064).
[Primary datasets of carbon isotope ratio in phloem sap and sap flow in dominant tree species of a mixed broadleaf forest (Quercus robur, Fraxinus angustifolia, and Carpinus betulus) are provided. Additionally, daily sums of ecosystem gross primary production in the mixed broadleaf forest, estimated using the eddy-covariance technique, are presented. These datasets contain the primary values used in the publication by Stojanović et al. (2024), titled "Disaggregation of Canopy Photosynthesis Among Tree Species in a Mixed Broadleaf Forest" and published in the journal Tree Physiology (DOI: 10.1093/treephys/tpae064).]
Klíčová slova: Gross primary production * Eddy Covariance * Sap Flow * Phloem isotopes * Deciduous angiosperms * Phenology
Obor OECD: Plant sciences, botany
DOI: https://doi.org/10.57680/asep.0586665
Handle: https://hdl.handle.net/11104/0354128
Vkladatel: Urban, Otmar
Datum publikování: 10.6.2024
 

0586288 - FZÚ DATA Vědecká data      2024
Ryabchikov, Yury V. - Mirza, M. Inam - Flimelová, Miroslava - Kaňa, A. - Romanyuk, Olexandr

Dataset for Merging of Bi-Modality of Ultrafast Laser Processing: Heating of Si/Au Nanocomposite Solutions with Controlled Chemical Content.

Popis: The dataset contains the original data of experimental measurements for the manuscript submitted to the journal Nanomaterials:
Authors: Yury V. Ryabchikov, Inam Mirza, Miroslava Flimelová, Antonin Kana and Oleksandr Romanyuk
Title: Volumetric Modification of Transparent Materials with Two-Color Laser Irradiation: Insight from Numerical Modeling
Submission date: January 3, 2024
The detailed description of each file in the format *.png is given in the txt-file ReadMe.
The data were used to produce figures presented in the manuscript.

Klíčová slova: ultrafast laser processing * silicon nanoparticles * plasmonic nanoparticles * Si-Au composite nanoparticles * nanocomposites * laser ablation * hyperthermia * photo-thermal therapy
Obor OECD: Nano-materials (production and properties)
DOI: https://doi.org/10.57680/asep.0586288
Handle: https://hdl.handle.net/11104/0353844
Vkladatel: admin
Datum publikování: 31.5.2024
 
Publikace ASEP:
Merging of Bi-modality of ultrafast laser processing: Heating of Si/Au nanocomposite solutions with controlled chemical content