TY - JOUR AU - Kiss, László AU - Szabó, Péter AU - Kunsági-Máté, Sándor TI - Comparison between Electrooxidation of 1-Naphthol and 2-Naphthol in Different Non-Aqueous Solvents and Suppression of Layer Growth of Polymers JF - SURFACES J2 - SURFACES-BASEL VL - 7 PY - 2024 IS - 1 SP - 164 EP - 180 PG - 17 SN - 2571-9637 DO - 10.3390/surfaces7010011 UR - https://m2.mtmt.hu/api/publication/34777126 ID - 34777126 N1 - Funding Agency and Grant Number: Hungarian National Research Development and Innovation Office (NKFI) Funding text: No Statement Available AB - The two naphthol isomers were investigated in different organic solvents by taking cyclic voltammograms, and fouling took place on a platinum electrode surface, except for dimethyl sulfoxide and dimethyl formamide. Studies in allyl alcohol rarely used in electrochemical investigations pointed to the importance of the carbon-carbon double bond as electrode deactivation was remarkably faster compared with its saturated analog solvent. Similarly, the use of the other unsaturated solvent mesityl oxide in the electropolymerization of naphthols resulted in different findings compared with methyl isobutyl ketone. As dimethyl formamide was the best choice concerning the solubility of products, it was successfully tested in electrode renewal after deactivation in an aqueous solution. The increase in dimethyl formamide content led to more and more improved reproducibility of the currents of the outlined aromatic compounds. Naphthol isomers were assessed in the suppression of layer growth originating from the electrooxidation of another monomer phloroglucinol. Its simultaneous electrooxidation with naphthol monomers had a dramatic effect on layer morphology and it was found that instead of a coherent organic layer originating from the homopolymerization of phloroglucinol, the copolymerization with naphthols led to the development of more porous and rougher deposits. The suppressed electropolymerization thus increased sensitivity towards a chosen redox active compound, 4-methoxyphenol. LA - English DB - MTMT ER - TY - JOUR AU - Néma, Viktória AU - Kunsági-Máté, Sándor AU - Őri, Zsuzsanna Emese AU - Kiss, Tamás AU - Szabó, Péter AU - Szalma, József AU - Fráter, Márk Tibor AU - Lempel, Edina TI - Relation between internal adaptation and degree of conversion of short-fiber reinforced resin composites applied in bulk or layered technique in deep MOD cavities JF - DENTAL MATERIALS J2 - DENT MATER VL - 40 PY - 2024 IS - 4 SP - 581 EP - 592 PG - 12 SN - 0109-5641 DO - 10.1016/j.dental.2024.02.013 UR - https://m2.mtmt.hu/api/publication/34575631 ID - 34575631 N1 - * Megosztott szerzőség LA - English DB - MTMT ER - TY - JOUR AU - Tong, Lei AU - Su, Can AU - Li, Heng AU - Wang, Xinyu AU - Fan, Wenhao AU - Wang, Qingguo AU - Kunsági-Máté, Sándor AU - Yan, Hui AU - Yin, Shougen TI - Self-Driven Gr/WSe2/Gr Photodetector with High Performance Based on Asymmetric Schottky van der Waals Contacts JF - ACS APPLIED MATERIALS & INTERFACES J2 - ACS APPL MATER INTER VL - 15 PY - 2023 IS - 49 SP - 57868 EP - 57878 PG - 11 SN - 1944-8244 DO - 10.1021/acsami.3c14331 UR - https://m2.mtmt.hu/api/publication/34413259 ID - 34413259 N1 - Funding Agency and Grant Number: National Natural Science Foundation of China [11604242]; Tianjin Research Program of Application Foundation and Advanced Technology of China [18JCQNJC02500]; Fundamental Research Funds for the Central Universities of China [20720230012]; Hungarian National Research Development and Innovation Office [NKFI-137793]; New National Excellence Program of the Ministry for Innovation and Technology of Hungary [TKP2021-EGA-17] Funding text: The authors gratefully acknowledge the financial support of the National Natural Science Foundation of China (11604242), the Tianjin Research Program of Application Foundation and Advanced Technology of China (18JCQNJC02500), the Fundamental Research Funds for the Central Universities of China (20720230012), the Hungarian National Research Development and Innovation Office (NKFI-137793), and the New National Excellence Program of the Ministry for Innovation and Technology of Hungary (TKP2021-EGA-17). AB - Two-dimensional (2D) self-driven photodetectors have a wide range of applications in wearable, imaging, and flexible electronics. However, the preparation of most self-powered photodetectors is still complex and time-consuming. Simultaneously, the constant work function of a metal, numerous defects, and a large Schottky barrier at the 2D/metal interface hinder the transmission and collection of optical carriers, which will suppress the optical responsivity of the device. This paper proposed a self-driven graphene/WSe2/graphene (Gr/WSe2/Gr) photodetector with asymmetric Schottky van der Waals (vdWs) contacts. The vdWs contacts are formed by transferring Gr as electrodes using the dry-transfer method, obviating the limitations of defects and Fermi-level pinning at the interface of electrodes made by conventional metal deposition methods to a great extent and resulting in superior dynamic response, which leads to a more efficient and faster collection of photogenerated carriers. This work also demonstrates that the significant surface potential difference of Gr electrodes is a crucial factor to ensure their superior performance. The self-driven Gr/WSe2/Gr photodetector exhibits an ultrahigh Ilight/Idark ratio of 106 with a responsivity value of 20.31 mA/W and an open-circuit voltage of 0.37 V at zero bias. The photodetector also has ultrafast response speeds of 42.9 and 56.0 μs. This paper provides a feasible way to develop self-driven optoelectronic devices with a simple structure and excellent performance. LA - English DB - MTMT ER - TY - CHAP AU - Bencze, Flórián AU - Bognár, Balázs AU - Kálai, Tamás AU - Kollár, László AU - Nagymihaly, Zoltan AU - Kunsági-Máté, Sándor ED - Hagymási, Krisztina ED - Janda, Tibor ED - Pál, Magda ED - Poór, Péter ED - Szalai, Gabriella TI - Kettős (Spin és Fluoreszcens) Szenzor Molekulák Új Alkalmazása T2 - A Magyar Szabadgyökkutató Társaság XII. Kongresszusa PB - Agrártudományi Kutatóközpont, Mezőgazdasági Intézet CY - Martonvásár SN - 9786156203021 PY - 2023 SP - 13 EP - 13 PG - 1 UR - https://m2.mtmt.hu/api/publication/34131883 ID - 34131883 LA - English DB - MTMT ER - TY - JOUR AU - Bencze, Flórián AU - Bognár, Balázs AU - Kálai, Tamás AU - Kollár, László AU - Nagymihaly, Zoltan AU - Kunsági-Máté, Sándor TI - A New Application of Spin and Fluorescence Double-Sensor Molecules JF - MOLECULES J2 - MOLECULES VL - 28 PY - 2023 IS - 7 PG - 12 SN - 1420-3049 DO - 10.3390/molecules28072978 UR - https://m2.mtmt.hu/api/publication/33722185 ID - 33722185 AB - EPR imaging techniques are known to be successful tools for mapping living bodies, especially because of the high transparency of tissues in the microwave range. This technique assumes the presence of radicals whose in vivo transport is also controlled by serum albumins. Accordingly, in this study, the interactions between 3-hydroxymethyl-1-oxyl-4-(pyren-1-yl)-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrole radical and the human serum albumin molecules were investigated. To clarify the adsorption processes of this radical onto the surface of human serum albumin (HSA), the interaction of the OMe derivative of the radical was also examined parallel with the studies on the radical—HSA interactions. Considering the solubility issues and also to modulate the transport, inclusion complexes of the radical with a cavitand derivative were also studied. The latter interactions were observed through fluorescence spectroscopy, fluorescence polarization, and by EPR spectroscopy. As a double-sensor molecule, we found that the fluorophore nitroxide is a good candidate as it gave further information about host-guest interactions (fluorescence, fluorescence polarization, and EPR). We also found that in the presence of a cavitand, a complex with greater stability was formed between the sensor molecule and the human serum albumin. Based on these observations, we can conclude that applying this double-sensor (spin, fluorescent) molecule is useful in cases when different interactions can affect the EPR measurements. LA - English DB - MTMT ER - TY - JOUR AU - Kincses, Dóra AU - Jordáki, D AU - Szebeni, D AU - Kunsági-Máté, Sándor AU - Szalma, József AU - Lempel, Edina TI - Effect of Ceramic and Dentin Thicknesses and Type of Resin-Based Luting Agents on Intrapulpal Temperature Changes during Luting of Ceramic Inlays JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 24 PY - 2023 IS - 6 PG - 17 SN - 1661-6596 DO - 10.3390/ijms24065466 UR - https://m2.mtmt.hu/api/publication/33695436 ID - 33695436 N1 - Funding Agency and Grant Number: Hungarian Academy of Sciences Bolyai Janos Research Scholarship [BO/713/20/5]; UNKP-22-5 New National Excellence Program of the Ministry for Innovation and Technology from the Source of the National Research, Development and Innovation Fund, Hungary [UNKP-22-5-PTE-1733]; University of Pecs Medical School Research Found [PTE-AOK-KA-2020/16, PTE-AOK-KA-2020/24]; National Research, Development and Innovation Office, Hungary [NKFI-137793]; Thematic Excellence Program, Hungary [TKP2021-EGA-17] Funding text: This research was funded by the Hungarian Academy of Sciences Bolyai Janos Research Scholarship (BO/713/20/5); the UNKP-22-5 New National Excellence Program of the Ministry for Innovation and Technology from the Source of the National Research, Development and Innovation Fund, Hungary (UNKP-22-5-PTE-1733); the University of Pecs Medical School Research Found (PTE-AOK-KA-2020/16; PTE-AOK-KA-2020/24). Microcalorimetric measurements are supported by the National Research, Development and Innovation Office, Hungary (NKFI-137793) and the Thematic Excellence Program, Hungary (TKP2021-EGA-17). AB - The adhesive cementation of ceramic inlays may increase pulpal temperature (PT) and induce pulpal damage due to heat generated by the curing unit and the exothermic reaction of the luting agent (LA). The aim was to measure the PT rise during ceramic inlay cementation by testing different combinations of dentin and ceramic thicknesses and LAs. The PT changes were detected using a thermocouple sensor positioned in the pulp chamber of a mandibular molar. Gradual occlusal reduction obtained dentin thicknesses of 2.5, 2.0, 1.5, and 1.0 mm. Light-cured (LC) and dual-cured (DC) adhesive cements and preheated restorative resin-based composite (RBC) were applied to luting of 2.0, 2.5, 3.0, and 3.5 mm lithium disilicate ceramic blocks. Differential scanning calorimetry was used to compare the thermal conductivity of dentin and ceramic slices. Although ceramic reduced heat delivered by the curing unit, the exothermic reaction of the LAs significantly increased it in each investigated combination (5.4-7.9 °C). Temperature changes were predominantly influenced by dentin thickness followed by LA and ceramic thickness. Thermal conductivity of dentin was 24% lower than that of ceramic, and its thermal capacity was 86% higher. Regardless of the ceramic thickness, adhesive inlay cementation can significantly increase the PT, especially when the remaining dentin thickness is <2 mm. LA - English DB - MTMT ER - TY - JOUR AU - Kiss, László AU - Kunsági-Máté, Sándor TI - Scan rate and concentration dependence of the voltammograms of substituted phenols on electrodes with different size, diffusion coefficients of phenols in different solvents JF - CANADIAN JOURNAL OF CHEMISTRY J2 - CAN J CHEM VL - 101 PY - 2023 IS - 5 SP - 297 EP - 305 PG - 9 SN - 0008-4042 DO - 10.1139/cjc-2022-0096 UR - https://m2.mtmt.hu/api/publication/33688939 ID - 33688939 AB - In this work, the effects of the scan rate and the concentration of the substituted phenols on the peak currents or current plateaus have been investigated. Voltammetric curves recorded by a platinum microelectrode varied significantly under different experimental conditions in cases of 4-chlorophenol, 4- tert-butylphenol, and 4-nitrophenol. In the case of 4-methoxyphenol and 4- tert-butylphenol, when the experiments were performed in the lower concentration range in acetonitrile, the plateau current and peak current showed linear dependence on phenol concentration. Therefore, these ranges offer opportunity for further characterization. The electrode reaction of 4-methoxyphenol was found to be a diffusion-controlled process in the solvents applied (water, acetonitrile, dimethyl sulfoxide, dimethyl formamide, nitrobenzene, acetone, dichloromethane, methanol, ethanol, 1-propanol, 1-butanol, and 1-pentanol). Diffusion coefficients of 4-methoxyphenol were determined with a microelectrode using the steady-state voltammograms. Diffusion coefficients of other phenols were measured only in acetonitrile with a macroelectrode. In agreement with known theories, the diffusion coefficients showed inversely proportional relationships with the solvent viscosities. Special care was needed in 1-pentanol solvent since the increasing anodic peaks appeared after the first scan and overlaid with the sigmoidal-shaped regular microelectrode voltammograms. This observation is probably due to formation of adhering residual electroactive products. LA - English DB - MTMT ER - TY - JOUR AU - Lempel, Edina AU - Szebeni, D AU - Őri, Zsuzsanna Emese AU - Kiss, T AU - Szalma, József AU - Lovász, Bálint Viktor AU - Kunsági-Máté, Sándor AU - Böddi, Katalin TI - The effect of high-irradiance rapid polymerization on degree of conversion, monomer elution, volumetric change and porosity of bulk-fill resin composites JF - DENTAL MATERIALS J2 - DENT MATER VL - 39 PY - 2023 IS - 4 SP - 442 EP - 453 PG - 12 SN - 0109-5641 DO - 10.1016/j.dental.2023.03.016 UR - https://m2.mtmt.hu/api/publication/33680296 ID - 33680296 N1 - Funding Agency and Grant Number: Hungarian Academy of Sciences; New National Excellence Program of the Ministry for Innovation and Technology from the Source of the National Research, Development and Innovation Fund, Hungary [UNKP-22-5]; [BO/713/20/5]; [UNKP-22-5-PTE-1733] Funding text: This work was supported by the Hungarian Academy of Sciences, Bolyai Janos Research Scholarship (BO/713/20/5) ; UNKP-22-5 New National Excellence Program of the Ministry for Innovation and Technology from the Source of the National Research, Development and Innovation Fund, Hungary (UNKP-22-5-PTE-1733) . AB - The purpose was to compare the degree of conversion (DC), monomer elution (ME), polymerization shrinkage (PS) and porosity of two addition-fragmentation chain transfer (AFCT) modified resin-based composites (RBC) light-cured with rapid- (RP), turbo- (TP) or conventional polymerization (CP) settings.Cylindrical samples (6-mm wide, 4-mm thick) were prepared from Tetric PowerFill (TPF) and Filtek One Bulk (FOB). Four groups were established according to the polymerization settings: 3s-RP, 5s-TP, 10s-CP and 20s-CP. Samples in 1 mm thickness with 20s-CP settings served as controls. The DC at the top and bottom surfaces was measured with micro-Raman spectroscopy. ME was detected with high-performance liquid chromatography. PS and porosity were analyzed by micro-computed tomography. ANOVA and Tukey's post-hoc test, multivariate analysis and partial eta-squared statistics were used to analyze the data (p < 0.05).FOB showed higher DC values (61.5-77.5 %) at the top compared to TPF (43.5-67.8 %). At the bottom TPF samples achieved higher DCs (39.9-58.5 %) than FOB (18.21-66.18 %). Extending the curing time increased DC (except the top of FOB) and decreased ME. BisGMA release was the highest among the detected monomers from both RBCs. The amount was three-fold more from TPF. The factor Material and Exposure significantly influenced DC and ME. PS (1.8-2.5 %) did not differ among the groups and RBCs except for the lowest value of TPF cured with the 3s_RP setting (p = 0.03). FOB showed 4.5-fold lower porosity (p < 0.001). Significantly higher pore volume was detected after polymerization in 3s_RP (p < 0.001).High-irradiance rapid 3-s curing of AFCT modified RBCs resulted in inferior results for some important material properties. A longer exposure time is recommended in a clinical situation. LA - English DB - MTMT ER - TY - JOUR AU - Kiss, László AU - Nagymihaly, Zoltan AU - Szabó, Péter AU - Kollár, László AU - Kunsági-Máté, Sándor TI - Detection of Residual 2-Phenylphenol on Lemon Rind by Electrochemically Deposited Poly(hydroxybenzaldehyde) and Poly(hydroxybenzoic acid) Polymeric Stackings as Electrode Modifiers JF - MATERIALS J2 - MATERIALS VL - 16 PY - 2023 IS - 1 PG - 12 SN - 1996-1944 DO - 10.3390/ma16010357 UR - https://m2.mtmt.hu/api/publication/33550179 ID - 33550179 AB - This study explores the characteristics of electrodeposition of the three hydroxybenzaldehyde isomers and selected hydroxybenzoic acids (4-hydroxybenzoic acid, salicylic acid, 3,5-dihydroxybenzoic acid) from mesityl oxide solvent. Similar to recent advances of this solvent, used by electrochemical studies, the carbon–carbon double bond had significant influence on the formation of polymers from the outlined molecules. In case of most substrates the peak currents increased to a steady-state but electropolymerization of some substrates caused significant deactivation. Scanning electron microscopic and complementary voltammetric studies facilitated that the electrochemically formed polymers are present on the electrode surface in stackings. In viewpoint of analysis of 2-phenylphenol, the modifying deposit formed from 4-hydroxybenzaldehyde was the best with 5 µM detection limit obtained with differential pulse voltammetry. Furthermore, a new procedure was chosen for the involvement of a cavitand derivative into the organic layers with the purpose to improve the layer selectivity (subsequent electrochemical polymerization in an other solution). Further studies showed that in this way the sensitivities of as-modified electrodes were a little worse than without this step, thus indicating that application of this step is disadvantageous. Recovery studies of 2-phenylphenol were carried out on lemon rind without any treatment, and it was compared with the case when the outer yellow layer was removed by rasping. The inner tissues showed very high adsorption affinity towards 2-phenylphenol. LA - English DB - MTMT ER - TY - JOUR AU - Kiss, László AU - Nagymihaly, Zoltan AU - Kollár, László AU - Kunsági-Máté, Sándor TI - Voltammetric and Fluorimetric Studies of Dibenzoylmethane on Glassy Carbon Electrodes and Its Interaction with Tetrakis (3,5-Dicarboxyphenoxy) Cavitand Derivative JF - MOLECULES J2 - MOLECULES VL - 28 PY - 2023 IS - 1 PG - 9 SN - 1420-3049 DO - 10.3390/molecules28010185 UR - https://m2.mtmt.hu/api/publication/33550159 ID - 33550159 AB - Due to the medical importance of dibenzoylmethane, one of the aims of the study was to find an appropriate packing material and a biologically friendly co-solvent to help its introduction into living systems. Accordingly, redox properties of dibenzoylmethane were investigated on glassy carbon electrodes in acetonitrile and in 1-propanol with cyclic voltammetry, and showed a diffusion-controlled process. In the anodic window, an oxidation peak appeared at around 1.9 V in both solvents. Cycling repeatedly between 0 and 2 V, the reproducibility of this peak was acceptable, but when extending the window to higher potentials, the electrode deactivated, obviously due to electrode material. The addition of the investigated tetrakis(3,5-dicarboxyphenoxy) cavitand did not significantly change the voltammograms. Further electrochemical experiments showed that the coexistence of water in acetonitrile and 1-propanol drastically reduces the solubility of dibenzoylmethane. Moreover, very rapid electrode deactivation occurred and this fact made the use of electrochemical methods complicated. Considering that both the cavitand and dibenzoylmethane are soluble in dimethyl sulfoxide, the interaction of these species was investigated and formation of stable complexes was detected. This observation was verified with fluorescence quenching studies. The mixture of water and dimethyl sulphoxide also dramatically improved the solubility of the cavitand–dibenzoylmethane complex at high excess of water. The addition of cavitand improved the solubility of dibenzoylmethane, a property which supports the application of dibenzoylmethane in therapy. LA - English DB - MTMT ER -