TY - JOUR AU - Palásti, Dávid Jenő AU - Villy, Lajos Péter AU - Leits, B. AU - Kéri, Albert AU - Kohut, Attila AU - Bélteki, Ádám AU - Kajner, Gyula AU - Casian Plaza, Fernando Alexander AU - Kovács-Széles, Éva AU - Ajtai, Tibor AU - Veres, Miklós AU - Geretovszky, Zsolt AU - Galbács, Gábor TI - Detection and characterization of mono- and bimetallic nanoparticles produced by electrical discharge plasma generators using laser-induced breakdown spectroscopy JF - SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY J2 - SPECTROCHIM ACTA B VL - 209 PY - 2023 PG - 7 SN - 0584-8547 DO - 10.1016/j.sab.2023.106804 UR - https://m2.mtmt.hu/api/publication/34536295 ID - 34536295 LA - English DB - MTMT ER - TY - JOUR AU - Szőllősi, Réka AU - Molnár, Árpád AU - Janovszky, Patrick Martin AU - Kéri, Albert AU - Galbács, Gábor AU - Dernovics, Mihály AU - Kolbert, Zsuzsanna TI - Selenate triggers diverse oxidative responses in Astragalus species with diverse selenium tolerance and hyperaccumulation capacity JF - PLANT PHYSIOLOGY AND BIOCHEMISTRY J2 - PLANT PHYSIOL BIOCH (PPB) VL - 202 PY - 2023 PG - 15 SN - 0981-9428 DO - 10.1016/j.plaphy.2023.107976 UR - https://m2.mtmt.hu/api/publication/34131501 ID - 34131501 N1 - Department of Plant Biology, University of Szeged, Közép alley 52, Szeged, 6726, Hungary Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm square 7, Szeged, 6720, Hungary Department of Plant Physiology, Agricultural Institute, Centre for Agricultural Research, Eötvös Loránd Research Network, Brunszvik str. 2., Martonvásár, 2462, Hungary Export Date: 2 October 2023 CODEN: PPBIE Correspondence Address: Kolbert, Z.; Department of Plant Biology, Közép alley 52, Hungary; email: ordogne.kolbert.zsuzsanna@szte.hu LA - English DB - MTMT ER - TY - JOUR AU - Janovszky, Patrick Martin AU - Kéri, Albert AU - Palásti, Dávid Jenő AU - Brunnbauer, Lukas AU - Domoki, Ferenc AU - Limbeck, Andreas AU - Galbács, Gábor TI - Quantitative elemental mapping of biological tissues by laser-induced breakdown spectroscopy using matrix recognition JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 13 PY - 2023 IS - 1 PG - 10 SN - 2045-2322 DO - 10.1038/s41598-023-37258-y UR - https://m2.mtmt.hu/api/publication/34028055 ID - 34028055 N1 - Export Date: 25 July 2023 AB - The present study demonstrates the importance of converting signal intensity maps of organic tissues collected by laser-induced breakdown spectroscopy (LIBS) to elemental concentration maps and also proposes a methodology based on machine learning for its execution. The proposed methodology employs matrix-matched external calibration supported by a pixel-by-pixel automatic matrix (tissue type) recognition performed by linear discriminant analysis of the spatially resolved LIBS hyperspectral data set. On a swine (porcine) brain sample, we successfully performed this matrix recognition with an accuracy of 98% for the grey and white matter and we converted a LIBS intensity map of a tissue sample to a correct concentration map for the elements Na, K and Mg. Found concentrations in the grey and white matter agreed the element concentrations published in the literature and our reference measurements. Our results revealed that the actual concentration distribution in tissues can be quite different from what is suggested by the LIBS signal intensity map, therefore this conversion is always suggested to be performed if an accurate concentration distribution is to be assessed. LA - English DB - MTMT ER - TY - JOUR AU - Villy, Lajos Péter AU - Kohut, Attila AU - Kéri, Albert AU - Bélteki, Ádám AU - Radnóczi, György AU - Fogarassy, Zsolt AU - Radnóczi, György Zoltán AU - Galbács, Gábor AU - Geretovszky, Zsolt TI - Continuous spark plasma synthesis of Au/Co binary nanoparticles with tunable properties JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 12 PY - 2022 IS - 1 PG - 9 SN - 2045-2322 DO - 10.1038/s41598-022-22928-0 UR - https://m2.mtmt.hu/api/publication/33208918 ID - 33208918 AB - We present here a scalable and environmentally friendly gas phase technique employing atmospheric pressure electrical spark discharge plasmas for the production of Au/Co binaries, an effective catalyst system for the decomposition of hydrogen-rich compounds, such as ammonium borane. We demonstrate that Au/Co alloy nanoparticles can be produced via the spark plasma-based technique. The possibility of varying the morphology and phase structure via real time heat treatment of the generated aerosol to form Au/Co/CoO particles with continuous control over a wide particle compositional range (from 24 to 64 at.% [Co]/([Co] + [Au]) content) is also demonstrated. Since our spark-based approach is proven to be capable of providing reasonable particle yields, these results may contribute to the transition of lab-scale, nanocatalyst-based hydrogen storage systems to real world applications. LA - English DB - MTMT ER - TY - JOUR AU - Kajner, Gyula AU - Kéri, Albert AU - Bélteki, Ádám AU - Valkai, Sándor AU - Dér, András AU - Geretovszky, Zsolt AU - Galbács, Gábor TI - Multifunctional microfluidic chips for the single particle inductively coupled plasma mass spectrometry analysis of inorganic nanoparticles JF - LAB ON A CHIP J2 - LAB CHIP VL - 22 PY - 2022 IS - 14 SP - 2766 EP - 2776 PG - 11 SN - 1473-0197 DO - 10.1039/D2LC00377E UR - https://m2.mtmt.hu/api/publication/32919211 ID - 32919211 AB - This study aimed at exploiting the so far unexploited potential of carrying out on-line sample pretreatment steps on microfluidic chips for single particle inductively coupled plasma mass spectrometry (spICP-MS) measurements, and demonstrating their ability to practically facilitate most of the simpler tasks involved in the spICP-MS analysis of nanoparticles. For this purpose, polydimethylsiloxane microfluidic chips, capable of high-range dilution and sample injection were made by casting, using high-precision, 3D-printed molds. Optimization of their geometry and functions was done by running several hydrodynamic simulations and by gravimetric, fluorescence enhanced microscope imaging and solution-based ICP-MS experiments. On the optimized microfluidic chips, several experiments were done, demonstrating the benefits of the approach and these devices, such as the determination of nanoparticle concentration using only a few tens of microliters of sample, elimination of solute interferences by dilution, solution-based size calibration and characterisation of binary nanoparticles. Due to the unique design of the chips, they can be linked together to extend the dilution range of the system by more than a magnitude per chip. This feature was also demonstrated in applications requiring multiple-magnitude dilution rates, when two chips were sequentially coupled LA - English DB - MTMT ER - TY - CHAP AU - Casian Plaza, Fernando Alexander AU - Janovszky, Patrick Martin AU - Heszlerné Kopniczky, Judit AU - Kéri, Albert AU - M. Tóth, Tivadar AU - Galbács, Gábor ED - Alapi, Tünde ED - Berkecz, Róbert ED - Ilisz, István TI - Breakdown spectroscopy T2 - Proceedings of the 27th International Symposium on Analytical and Environmental Problems PB - University of Szeged CY - Szeged SN - 9789633068359 PY - 2021 SP - 128 EP - 133 PG - 6 UR - https://m2.mtmt.hu/api/publication/33668123 ID - 33668123 LA - English DB - MTMT ER - TY - JOUR AU - Galbács, Gábor AU - Kéri, Albert AU - Kohut, Attila AU - Veres, Miklós AU - Geretovszky, Zsolt TI - Nanoparticles in analytical laser and plasma spectroscopy - a review of recent developments in methodology and applications JF - JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY J2 - J ANAL ATOM SPECTROM VL - 36 PY - 2021 IS - 9 SP - 1826 EP - 1872 PG - 47 SN - 0267-9477 DO - 10.1039/d1ja00149c UR - https://m2.mtmt.hu/api/publication/32121906 ID - 32121906 LA - English DB - MTMT ER - TY - JOUR AU - Kohut, Attila AU - Villy, Lajos Péter AU - Kéri, Albert AU - Bélteki, Ádám AU - Megyeri, Dániel AU - Hopp, Béla AU - Galbács, Gábor AU - Geretovszky, Zsolt TI - Full range tuning of the composition of Au/Ag binary nanoparticles by spark discharge generation JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 11 PY - 2021 IS - 1 PG - 10 SN - 2045-2322 DO - 10.1038/s41598-021-84392-6 UR - https://m2.mtmt.hu/api/publication/31879425 ID - 31879425 LA - English DB - MTMT ER - TY - JOUR AU - Limbeck, A. AU - Brunnbauer, L. AU - Lohninger, H. AU - Pořízka, P. AU - Modlitbová, P. AU - Kaiser, J. AU - Janovszky, Patrick Martin AU - Kéri, Albert AU - Galbács, Gábor TI - Methodology and applications of elemental mapping by laser induced breakdown spectroscopy JF - ANALYTICA CHIMICA ACTA J2 - ANAL CHIM ACTA VL - 1147 PY - 2021 SP - 72 EP - 98 PG - 27 SN - 0003-2670 DO - 10.1016/j.aca.2020.12.054 UR - https://m2.mtmt.hu/api/publication/31791880 ID - 31791880 LA - English DB - MTMT ER - TY - CHAP AU - Kajner, Gyula AU - Kéri, Albert AU - Bélteki, Ádám AU - Valkai, Sándor AU - Dér, András AU - Geretovszky, Zsolt AU - Galbács, Gábor ED - Alapi, Tünde ED - Berkecz, Róbert ED - Ilisz, István TI - On-line characterization of nanoparticles by single particle ICP-MS utilizing microfluidic devices T2 - Proceedings of the 26th International Symposium on Analytical and Environmental Problems PB - University of Szeged CY - Szeged SN - 9789633067710 PY - 2020 SP - 183 EP - 187 PG - 5 UR - https://m2.mtmt.hu/api/publication/31877001 ID - 31877001 LA - English DB - MTMT ER -