TY - JOUR AU - Gera, Tamás Bence AU - Kondász, Bence AU - Smausz Kolumbán, Tamás AU - Heszlerné Kopniczky, Judit AU - Hodovány, Szabolcs AU - Ajtai, Tibor AU - Szabó-Révész, Piroska AU - Ambrus, Rita AU - Csóka, Ildikó AU - Hopp, Béla TI - Pulsed laser ablation of polymer-based magnetic nanocomposites for oil spill remediation JF - CLEANER MATERIALS J2 - CLEANER MATERIALS VL - 11 PY - 2024 SN - 2772-3976 DO - 10.1016/j.clema.2024.100235 UR - https://m2.mtmt.hu/api/publication/34723729 ID - 34723729 LA - English DB - MTMT ER - TY - JOUR AU - Samu, Gergely Ferenc AU - Zsigmond, T.S. AU - Hajdu, Cintia AU - Hunyadi, Mátyás AU - Csige, Lóránt AU - Csík, Attila AU - Heszlerné Kopniczky, Judit AU - Hopp, Béla AU - Janáky, Csaba TI - The Effect of Halide Composition on the Luminescent Properties of Ternary Cesium–Copper Halide Pseudo-Perovskite Films JF - ADVANCED OPTICAL MATERIALS J2 - ADV OPT MATER VL - 11 PY - 2023 IS - 21 PG - 9 SN - 2195-1071 DO - 10.1002/adom.202300825 UR - https://m2.mtmt.hu/api/publication/34094896 ID - 34094896 N1 - Department of Physical Chemistry and Materials Science, Interdisciplinary Excellence Centre, University of Szeged, Aradi V. tere 1, Szeged, H-6720, Hungary Institute for Nuclear Research, Bem tér 18/c, Debrecen, H-4026, Hungary Department of Optics and Quantum Electronics, University of Szeged, Dóm tér 9, Szeged, H-6720, Hungary Export Date: 14 August 2023 Correspondence Address: Samu, G.F.; Department of Physical Chemistry and Materials Science, Aradi V. tere 1, Hungary; email: samugf@chem.u-szeged.hu Correspondence Address: Janáky, C.; Department of Physical Chemistry and Materials Science, Aradi V. tere 1, Hungary; email: janaky@chem.u-szeged.hu LA - English DB - MTMT ER - TY - JOUR AU - Sisay, Elias Jigar AU - Fazekas, Ákos Ferenc AU - Gyulavári, Tamás AU - Heszlerné Kopniczky, Judit AU - Hopp, Béla AU - Veréb, Gábor AU - László, Zsuzsanna TI - Investigation of Photocatalytic PVDF Membranes Containing Inorganic Nanoparticles for Model Dairy Wastewater Treatment JF - MEMBRANES (BASEL) J2 - MEMBRANES-BASEL VL - 13 PY - 2023 IS - 7 PG - 21 SN - 2077-0375 DO - 10.3390/membranes13070656 UR - https://m2.mtmt.hu/api/publication/34059475 ID - 34059475 AB - Membrane separation processes are promising methods for wastewater treatment. Membrane fouling limits their wider use; however, this may be mitigated using photocatalytic composite materials for membrane preparation. This study aimed to investigate photocatalytic polyvinylidene fluoride (PVDF)-based nanocomposite membranes for treating model dairy wastewater containing bovine serum albumin (BSA). Membranes were fabricated via physical coating (with TiO2, and/or carbon nanotubes, and/or BiVO4) and blending (with TiO2). Another objective of this study was to compare membranes of identical compositions fabricated using different techniques, and to examine how various TiO2 concentrations affect the antifouling and cleaning performances of the blended membranes. Filtration experiments were performed using a dead-end cell. Filtration resistances, BSA rejection, and photocatalytic cleanability (characterized by flux recovery ratio (FRR)) were measured. The surface characteristics (SEM, EDX), roughness (measured by atomic force microscopy, AFM), wettability (contact angle measurements), and zeta potential of the membranes were also examined. Coated PVDF membranes showed higher hydrophilicity than the pristine PVDF membrane, as evidenced by a decreased contact angle, but the higher hydrophilicity did not result in higher fluxes, unlike the case of blended membranes. The increased surface roughness resulted in increased reversible fouling, but decreased BSA retention. Furthermore, the TiO2-coated membranes had a better flux recovery ratio (FRR, 97%) than the TiO2-blended membranes (35%). However, the TiO2-coated membrane had larger total filtration resistances and a lower water flux than the commercial pristine PVDF membrane and TiO2-blended membrane, which may be due to pore blockage or an additional coating layer formed by the nanoparticles. The BSA rejection of the TiO2-coated membrane was lower than that of the commercial pristine PVDF membrane. In contrast, the TiO2-blended membranes showed lower resistance than the pristine PVDF membrane, and exhibited better antifouling performance, superior flux, and comparable BSA rejection. Increasing the TiO2 content of the TiO2-blended membranes (from 1 to 2.5%) resulted in increased antifouling and comparable BSA rejection (more than 95%). However, the effect of TiO2 concentration on flux recovery was negligible. LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Eszter AU - Heszlerné Kopniczky, Judit AU - Smausz Kolumbán, Tamás AU - Náfrádi, Máté AU - Alapi, Tünde AU - Bohus, János AU - Pajer, Viktor AU - Révész, Piroska AU - Ambrus, Rita AU - Hopp, Béla TI - A comparative study of femtosecond pulsed laser ablation of meloxicam in distilled water and in air JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 13 PY - 2023 IS - 1 PG - 12 SN - 2045-2322 DO - 10.1038/s41598-023-36922-7 UR - https://m2.mtmt.hu/api/publication/34034385 ID - 34034385 N1 - Department of Optics and Quantum Electronics, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, Szeged, 6720, Hungary ELI ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3, Szeged, 6728, Hungary Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Eötvös utca 6, Szeged, 6720, Hungary Export Date: 21 September 2023 Correspondence Address: Hopp, B.; Department of Optics and Quantum Electronics, Dóm tér 9, Hungary; email: bhopp@physx.u-szeged.hu AB - The increasing prevalence of water insoluble or poorly soluble drugs calls for the development of new formulation methods. Common approaches include the reduction of particle size and degree of crystallinity. Pulsed laser ablation is a clean technique for producing sub-micrometre sized drug particles and has the potential to induce amorphization. We studied the effect of femtosecond pulsed laser ablation (ELI ALPS THz pump laser system: λ c = 781 nm, τ = 135 fs) on meloxicam in distilled water and in air. The ablated particles were characterized chemically, morphologically and in terms of crystallinity. We demonstrated that femtosecond laser ablation can induce partial amorphization of the particles in addition to a reduction in particle size. In the case of femtosecond pulsed laser ablation in air, the formation of pure meloxicam spheres showed that this technique can produce amorphous meloxicam without the use of excipients, which is a unique result. We also aimed to describe the ablation processes in both investigated media. LA - English DB - MTMT ER - TY - JOUR AU - Andrásik, Attila AU - Budai, Judit AU - Szörényi, Tamás AU - Vass, Csaba AU - Flender, Roland AU - Hopp, Béla TI - Spot size dependence of the ablation threshold of BK7 optical glass processed by single femtosecond pulses JF - APPLIED PHYSICS A - MATERIALS SCIENCE AND PROCESSING J2 - APPL PHYS A-MATER VL - 129 PY - 2023 IS - 7 PG - 9 SN - 0947-8396 DO - 10.1007/s00339-023-06782-z UR - https://m2.mtmt.hu/api/publication/33062901 ID - 33062901 LA - English DB - MTMT ER - TY - CONF AU - Ludasi, Krisztina AU - Sovány, Tamás AU - Jójártné Laczkovich, Orsolya AU - Hopp, Béla AU - Smausz Kolumbán, Tamás AU - Regdon, Géza (ifj.) TI - Lézerrel a gyógyszerhamisítás ellen T2 - Gyógyszertechnológiai és Ipari Gyógyszerészeti Konferencia 2022: A Magyar Gyógyszerésztudományi Társaság Gyógyszeripari Szervezetének és Gyógyszertechnológiai Szakosztályának Konferenciája PY - 2022 SP - 30 EP - 30 PG - 1 UR - https://m2.mtmt.hu/api/publication/33569293 ID - 33569293 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Homik, Zsolt AU - Heszlerné Kopniczky, Judit AU - Smausz Kolumbán, Tamás AU - Berkesi, Dániel Simon AU - Hopp, Béla TI - Formation of gold/silver composite nanoparticles by pulsed laser ablation of gold–silver layered films in liquid JF - APPLIED PHYSICS A - MATERIALS SCIENCE AND PROCESSING J2 - APPL PHYS A-MATER VL - 128 PY - 2022 IS - 9 PG - 13 SN - 0947-8396 DO - 10.1007/s00339-022-05938-7 UR - https://m2.mtmt.hu/api/publication/33134651 ID - 33134651 AB - Nanoparticles of high purity can be produced from a variety of materials by pulsed laser ablation of solids in liquid. Composite nanoparticles are of great importance in various applications such as catalysis or biomedicine and the process of their formation is still a subject of intense research. In this work, gold/silver composite nanoparticles were synthesized in aqueous media by ns pulsed laser ablation of gold–silver multilayer targets with different absolute layer thicknesses and layer thickness ratios. The generated nanoparticles showed a log-normal distribution of sizes, with average diameter in the 20–40 nm range and standard deviation of 9–30 nm. By comparing the UV–VIS absorbance spectra of the nanoparticle colloids with two theoretical calculations (based on the Mie and the BEM model), it was found that there is a direct correlation between the average Au and Ag content of the nanoparticles and the composition of the films on the substrate. Assuming thermal ablation, our model calculations showed that there is a maximum thickness of the top layer up to which both layers can be ablated simultaneously and alloy nanoparticles can be produced. LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Eszter AU - Homik, Zsolt AU - Smausz Kolumbán, Tamás AU - Heszlerné Kopniczky, Judit AU - Náfrádi, Máté AU - Alapi, Tünde AU - Kókai, Dávid AU - Burián, Katalin AU - Révész, Piroska AU - Ambrus, Rita AU - Hopp, Béla TI - A comprehensive analysis of meloxicam particles produced by nanosecond laser ablation as a wet milling technique JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 12 PY - 2022 IS - 1 PG - 13 SN - 2045-2322 DO - 10.1038/s41598-022-16728-9 UR - https://m2.mtmt.hu/api/publication/33029379 ID - 33029379 N1 - Department of Optics and Quantum Electronics, University of Szeged, Dóm tér 9, Szeged, 6720, Hungary Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, Szeged, 6720, Hungary Department of Medical Microbiology, Albert Szent-Györgyi Medical School, University of Szeged, Dóm tér 10, Szeged, 6720, Hungary Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Eötvös utca 6, Szeged, LA - English DB - MTMT ER - TY - JOUR AU - Party, Petra AU - Kókai, Dávid AU - Burián, Katalin AU - Nagy, Attila Tibor AU - Hopp, Béla AU - Ambrus, Rita TI - Development of extra-fine particles containing nanosized meloxicam for deep pulmonary delivery: in vitro aerodynamic and cell line measurements JF - EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES J2 - EUR J PHARM SCI VL - 176 PY - 2022 PG - 13 SN - 0928-0987 DO - 10.1016/j.ejps.2022.106247 UR - https://m2.mtmt.hu/api/publication/32908732 ID - 32908732 LA - English DB - MTMT ER - TY - JOUR AU - Kondász, Bence AU - Hopp, Béla AU - Smausz Kolumbán, Tamás TI - Mixed scattering as a problem in laser speckle contrast analysis JF - APPLIED OPTICS J2 - APPL OPTICS VL - 60 PY - 2021 IS - 22 SP - 6593 EP - 6599 PG - 7 SN - 1559-128X DO - 10.1364/AO.428785 UR - https://m2.mtmt.hu/api/publication/32337027 ID - 32337027 AB - Static scattering is detrimental to the accuracy of laser speckle contrast analysis (LASCA) measurements on skin when, instead of percentile change monitoring, absolute perfusion values are needed, e.g., for tissue injury examination. Perfusion values were calculated using two evaluation models, while changing the dynamic/static scattering ratio of monitored skin and tissue phantoms. Results were strongly affected by the significant increase of static contribution. Measurements on a modified tissue phantom showed that the changes in the measured perfusion values were mostly caused by the mixed scattering, which was omitted by the tested models. Dynamic ratio values obtained by multi-exposure LASCA could be used for perfusion data correction. (C) 2021 Optical Society of America LA - English DB - MTMT ER -