@article{MTMT:34723729, title = {Pulsed laser ablation of polymer-based magnetic nanocomposites for oil spill remediation}, url = {https://m2.mtmt.hu/api/publication/34723729}, author = {Gera, Tamás Bence and Kondász, Bence and Smausz Kolumbán, Tamás and Heszlerné Kopniczky, Judit and Hodovány, Szabolcs and Ajtai, Tibor and Szabó-Révész, Piroska and Ambrus, Rita and Csóka, Ildikó and Hopp, Béla}, doi = {10.1016/j.clema.2024.100235}, journal-iso = {CLEANER MATERIALS}, journal = {CLEANER MATERIALS}, volume = {11}, unique-id = {34723729}, year = {2024}, eissn = {2772-3976}, orcid-numbers = {Gera, Tamás Bence/0000-0002-0642-0423; Smausz Kolumbán, Tamás/0000-0002-5184-6124; Hopp, Béla/0000-0002-4272-7721} } @article{MTMT:34094896, title = {The Effect of Halide Composition on the Luminescent Properties of Ternary Cesium–Copper Halide Pseudo-Perovskite Films}, url = {https://m2.mtmt.hu/api/publication/34094896}, author = {Samu, Gergely Ferenc and Zsigmond, T.S. and Hajdu, Cintia and Hunyadi, Mátyás and Csige, Lóránt and Csík, Attila and Heszlerné Kopniczky, Judit and Hopp, Béla and Janáky, Csaba}, doi = {10.1002/adom.202300825}, journal-iso = {ADV OPT MATER}, journal = {ADVANCED OPTICAL MATERIALS}, volume = {11}, unique-id = {34094896}, issn = {2195-1071}, year = {2023}, eissn = {2195-1071}, orcid-numbers = {Samu, Gergely Ferenc/0000-0002-3239-9154; Csík, Attila/0000-0002-8173-9653; Hopp, Béla/0000-0002-4272-7721; Janáky, Csaba/0000-0001-5965-5173} } @article{MTMT:34059475, title = {Investigation of Photocatalytic PVDF Membranes Containing Inorganic Nanoparticles for Model Dairy Wastewater Treatment}, url = {https://m2.mtmt.hu/api/publication/34059475}, author = {Sisay, Elias Jigar and Fazekas, Ákos Ferenc and Gyulavári, Tamás and Heszlerné Kopniczky, Judit and Hopp, Béla and Veréb, Gábor and László, Zsuzsanna}, doi = {10.3390/membranes13070656}, journal-iso = {MEMBRANES-BASEL}, journal = {MEMBRANES (BASEL)}, volume = {13}, unique-id = {34059475}, abstract = {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.}, year = {2023}, eissn = {2077-0375}, orcid-numbers = {Gyulavári, Tamás/0000-0001-6103-6689; Hopp, Béla/0000-0002-4272-7721; Veréb, Gábor/0000-0001-9642-1851} } @article{MTMT:34034385, title = {A comparative study of femtosecond pulsed laser ablation of meloxicam in distilled water and in air}, url = {https://m2.mtmt.hu/api/publication/34034385}, author = {Nagy, Eszter and Heszlerné Kopniczky, Judit and Smausz Kolumbán, Tamás and Náfrádi, Máté and Alapi, Tünde and Bohus, János and Pajer, Viktor and Révész, Piroska and Ambrus, Rita and Hopp, Béla}, doi = {10.1038/s41598-023-36922-7}, journal-iso = {SCI REP}, journal = {SCIENTIFIC REPORTS}, volume = {13}, unique-id = {34034385}, issn = {2045-2322}, abstract = {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.}, year = {2023}, eissn = {2045-2322}, orcid-numbers = {Smausz Kolumbán, Tamás/0000-0002-5184-6124; Náfrádi, Máté/0000-0001-8055-0974; Alapi, Tünde/0000-0002-9869-9280; Bohus, János/0000-0003-1749-4142; Pajer, Viktor/0000-0003-2770-510X; Révész, Piroska/0000-0002-5336-6052; Hopp, Béla/0000-0002-4272-7721} } @article{MTMT:33062901, title = {Spot size dependence of the ablation threshold of BK7 optical glass processed by single femtosecond pulses}, url = {https://m2.mtmt.hu/api/publication/33062901}, author = {Andrásik, Attila and Budai, Judit and Szörényi, Tamás and Vass, Csaba and Flender, Roland and Hopp, Béla}, doi = {10.1007/s00339-023-06782-z}, journal-iso = {APPL PHYS A-MATER}, journal = {APPLIED PHYSICS A - MATERIALS SCIENCE AND PROCESSING}, volume = {129}, unique-id = {33062901}, issn = {0947-8396}, year = {2023}, eissn = {1432-0630}, orcid-numbers = {Budai, Judit/0000-0001-9156-2233; Szörényi, Tamás/0000-0002-8888-4167; Vass, Csaba/0000-0003-1443-3360; Flender, Roland/0000-0001-6970-0716; Hopp, Béla/0000-0002-4272-7721} } @CONFERENCE{MTMT:33569293, title = {Lézerrel a gyógyszerhamisítás ellen}, url = {https://m2.mtmt.hu/api/publication/33569293}, author = {Ludasi, Krisztina and Sovány, Tamás and Jójártné Laczkovich, Orsolya and Hopp, Béla and Smausz Kolumbán, Tamás and Regdon, Géza (ifj.)}, booktitle = {Gyógyszertechnológiai és Ipari Gyógyszerészeti Konferencia 2022: A Magyar Gyógyszerésztudományi Társaság Gyógyszeripari Szervezetének és Gyógyszertechnológiai Szakosztályának Konferenciája}, unique-id = {33569293}, year = {2022}, pages = {30-30}, orcid-numbers = {Sovány, Tamás/0000-0003-3392-7788; Hopp, Béla/0000-0002-4272-7721; Smausz Kolumbán, Tamás/0000-0002-5184-6124; Regdon, Géza (ifj.)/0000-0002-6921-3069} } @article{MTMT:33134651, title = {Formation of gold/silver composite nanoparticles by pulsed laser ablation of gold–silver layered films in liquid}, url = {https://m2.mtmt.hu/api/publication/33134651}, author = {Homik, Zsolt and Heszlerné Kopniczky, Judit and Smausz Kolumbán, Tamás and Berkesi, Dániel Simon and Hopp, Béla}, doi = {10.1007/s00339-022-05938-7}, journal-iso = {APPL PHYS A-MATER}, journal = {APPLIED PHYSICS A - MATERIALS SCIENCE AND PROCESSING}, volume = {128}, unique-id = {33134651}, issn = {0947-8396}, abstract = {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.}, year = {2022}, eissn = {1432-0630}, orcid-numbers = {Smausz Kolumbán, Tamás/0000-0002-5184-6124; Hopp, Béla/0000-0002-4272-7721} } @article{MTMT:33029379, title = {A comprehensive analysis of meloxicam particles produced by nanosecond laser ablation as a wet milling technique}, url = {https://m2.mtmt.hu/api/publication/33029379}, author = {Nagy, Eszter and Homik, Zsolt and Smausz Kolumbán, Tamás and Heszlerné Kopniczky, Judit and Náfrádi, Máté and Alapi, Tünde and Kókai, Dávid and Burián, Katalin and Révész, Piroska and Ambrus, Rita and Hopp, Béla}, doi = {10.1038/s41598-022-16728-9}, journal-iso = {SCI REP}, journal = {SCIENTIFIC REPORTS}, volume = {12}, unique-id = {33029379}, issn = {2045-2322}, year = {2022}, eissn = {2045-2322}, orcid-numbers = {Smausz Kolumbán, Tamás/0000-0002-5184-6124; Náfrádi, Máté/0000-0001-8055-0974; Alapi, Tünde/0000-0002-9869-9280; Burián, Katalin/0000-0003-1300-2374; Révész, Piroska/0000-0002-5336-6052; Hopp, Béla/0000-0002-4272-7721} } @article{MTMT:32908732, title = {Development of extra-fine particles containing nanosized meloxicam for deep pulmonary delivery: in vitro aerodynamic and cell line measurements}, url = {https://m2.mtmt.hu/api/publication/32908732}, author = {Party, Petra and Kókai, Dávid and Burián, Katalin and Nagy, Attila Tibor and Hopp, Béla and Ambrus, Rita}, doi = {10.1016/j.ejps.2022.106247}, journal-iso = {EUR J PHARM SCI}, journal = {EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES}, volume = {176}, unique-id = {32908732}, issn = {0928-0987}, year = {2022}, eissn = {1879-0720}, orcid-numbers = {Burián, Katalin/0000-0003-1300-2374; Nagy, Attila Tibor/0000-0003-4595-3625; Hopp, Béla/0000-0002-4272-7721} } @article{MTMT:32337027, title = {Mixed scattering as a problem in laser speckle contrast analysis}, url = {https://m2.mtmt.hu/api/publication/32337027}, author = {Kondász, Bence and Hopp, Béla and Smausz Kolumbán, Tamás}, doi = {10.1364/AO.428785}, journal-iso = {APPL OPTICS}, journal = {APPLIED OPTICS}, volume = {60}, unique-id = {32337027}, issn = {1559-128X}, abstract = {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}, year = {2021}, eissn = {2155-3165}, pages = {6593-6599}, orcid-numbers = {Hopp, Béla/0000-0002-4272-7721; Smausz Kolumbán, Tamás/0000-0002-5184-6124} }