Výsledky vyhledávání

0587020 - ÚIACH 2025 CZ eng A - Abstrakt
Novotný, Jakub - Březinová, L. - Týčová, Anna
Acoustophoretic Focusing of Microparticles in Glass Microfluidic Device.
MSB 2024. Final Program and Abstract Book. Brno: Ústav analytické chemie AV ČR, v. v. i., 2024 - (Lavická, J.; Přikryl, J.; Foret, F.). s. 162-162. ISBN 978-80-908154-1-4.
[MSB 2024. International Symposium on Microscale Separation and Bioanalysis /40./. 19.05.2024-22.05.2024, Brno]
Institucionální podpora: RVO:68081715
Klíčová slova: glass microfluidic device * cell lysis * microdroplet * microparticles * acoustic standing waves (ASWs) * surface-enhanced Raman spectroscopy (SERS)
Obor OECD: Analytical chemistry
https://www.msb2024.org/user_uploads/program/Program_and_Abstract_Book_final.pdf
Trvalý link: https://hdl.handle.net/11104/0354339

0586928 - ÚOCHB 2025 RIV NL eng J - Článek v odborném periodiku
Wu, Tao - Kessler, Jiří - Zhao, H. - Zhao, Y.
Phosphorylation site of L-alanyl-L-glutamine identified by Raman optical activity spectroscopy.
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. Roč. 320, November (2024), č. článku 124587. ISSN 0584-8539
Grant CEP: GA ČR(CZ) GA23-05378S
Výzkumná infrastruktura: e-INFRA CZ - 90140
Institucionální podpora: RVO:61388963
Klíčová slova: biomolecular spectroscopy * raman optical activity * peptide phosphorylation * molecular dynamics * circularly polarized luminescence
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.saa.2024.124587
Trvalý link: https://hdl.handle.net/11104/0354296

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
 

0586503 - ÚIACH 2025 CZ eng A - Abstrakt
Svoboda, Milan - Slota, Alexandra - Vlčková, Nikol - Coelho, Gilberto - Greda, K. - Mrkvičková, M. - Boulouki, N. - Dvořák, P. - Kratzer, Jan
Atomization of hydride-forming elements in atmospheric-pressure discharges.
CSSC & MSMS 2024 book of abstracts. Praha: Spektroskopická společnost Jana Marka Marci, 2024 - (Holá, M.; Kanický, V.; Machala, L.; Matějka, P.; Sobek, K.; Vaculovič, T.; Vašina, T.). s. 116-116. ISBN 978-80-88195-54-2.
[Czech-Slovak Spectroscopic Conference (CSSC) /18./ & Mössbauer Spectroscopy in Materials Science (MSMS). 27.05.2024-31.05.2024, Kurdějov]
Grant CEP: GA ČR(CZ) GA23-05974K
Institucionální podpora: RVO:68081715
Klíčová slova: atmospheric pressure discharge * hydride generation * analytical atomic spectroscopy
Obor OECD: Analytical chemistry
https://cssc2024.spektroskopie.cz/files/BoA_final.pdf
Trvalý link: https://hdl.handle.net/11104/0353972