TY - JOUR AU - Kertész, Krisztián Imre AU - Piszter, Gábor AU - Vargáné Beck, Andrea AU - Horváth, Anita AU - Nagy, G. AU - Molnár, György AU - Radnóczi, György Zoltán AU - Horváth, Zsolt Endre AU - Illés, Levente AU - Biró, László Péter TI - Hybrid Bio-Nanocomposites by Integrating Nanoscale Au in Butterfly Scales Colored by Photonic Nanoarchitectures JF - PHOTONICS J2 - PHOTONICS-BASEL VL - 10 PY - 2023 IS - 11 PG - 15 SN - 2304-6732 DO - 10.3390/photonics10111275 UR - https://m2.mtmt.hu/api/publication/34538415 ID - 34538415 LA - English DB - MTMT ER - TY - JOUR AU - Pintérné Csordás, Anna AU - Illés, Levente AU - Perez-Feró, Erzsébet AU - Novotny, Tamás AU - Hózer, Zoltán AU - Stuckert, J AU - Sevecek, M TI - Magas hőmérsékleteken oxidált krómbevonatos Zr burkolatminták elektronsugaras vizsgálatai JF - ANYAGVIZSGÁLÓK LAPJA J2 - ANYAGVIZSGÁLÓK LAPJA PY - 2023 IS - 3 SP - 11 EP - 26 PG - 16 SN - 1215-8410 UR - https://m2.mtmt.hu/api/publication/34524708 ID - 34524708 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Cretu, C. AU - Nicola, R. AU - Marinescu, S.-A. AU - Picioruș, E.-M. AU - Suba, M. AU - Duda-Seiman, C. AU - Len, Adél AU - Illés, Levente AU - Horváth, Zsolt Endre AU - Putz, A.-M. TI - Performance of Zr-Based Metal–Organic Framework Materials as In Vitro Systems for the Oral Delivery of Captopril and Ibuprofen JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 24 PY - 2023 IS - 18 PG - 24 SN - 1661-6596 DO - 10.3390/ijms241813887 UR - https://m2.mtmt.hu/api/publication/34189377 ID - 34189377 LA - English DB - MTMT ER - TY - JOUR AU - Merkel, Dániel AU - Hegedűs, Gergő AU - Gracheva, Maria AU - Deák, András AU - Illés, Levente AU - Németh, Attila AU - Maccari, F. AU - Radulov, I. AU - Major, Márton AU - Chumakov, A. I. AU - Bessas, D. AU - Nagy, Dénes Lajos AU - Zolnai, Zsolt AU - Graning, S. AU - Sájerman, K. AU - Szilágyi, Edit AU - Lengyel, Attila TI - Ion-induced nanopattern formation in FeRh thin films JF - ESRF HIGHLIGHTS J2 - ESRF HIGHLIGHTS VL - 2022 PY - 2023 SP - 28 EP - 29 PG - 2 UR - https://m2.mtmt.hu/api/publication/33641673 ID - 33641673 LA - English DB - MTMT ER - TY - JOUR AU - Piszter, Gábor AU - Kertész, Krisztián Imre AU - Kovács, Dávid AU - Zámbó, Dániel AU - Baji, Zsófia AU - Illés, Levente AU - Nagy, Gergely AU - Pap, József Sándor AU - Bálint, Zsolt AU - Biró, László Péter TI - Spectral Engineering of Hybrid Biotemplated Photonic/Photocatalytic Nanoarchitectures JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 12 PY - 2022 IS - 24 PG - 18 SN - 2079-4991 DO - 10.3390/nano12244490 UR - https://m2.mtmt.hu/api/publication/33366417 ID - 33366417 AB - Solar radiation is a cheap and abundant energy for water remediation, hydrogen generation by water splitting, and CO2 reduction. Supported photocatalysts have to be tuned to the pollutants to be eliminated. Spectral engineering may be a handy tool to increase the efficiency or the selectivity of these. Photonic nanoarchitectures of biological origin with hierarchical organization from nanometers to centimeters are candidates for such applications. We used the blue wing surface of laboratory-reared male Polyommatus icarus butterflies in combination with atomic layer deposition (ALD) of conformal ZnO coating and octahedral Cu2O nanoparticles (NP) to explore the possibilities of engineering the optical and catalytic properties of hybrid photonic nanoarchitectures. The samples were characterized by UV-Vis spectroscopy and optical and scanning electron microscopy. Their photocatalytic performance was benchmarked by comparing the initial decomposition rates of rhodamine B. Cu2O NPs alone or on the butterfly wings, covered by a 5 nm thick layer of ZnO, showed poor performance. Butterfly wings, or ZnO coated butterfly wings with 15 nm ALD layer showed a 3 to 3.5 times enhancement as compared to bare glass. The best performance of almost 4.3 times increase was obtained for the wings conformally coated with 15 nm ZnO, deposited with Cu2O NPs, followed by conformal coating with an additional 5 nm of ZnO by ALD. This enhanced efficiency is associated with slow light effects on the red edge of the reflectance maximum of the photonic nanoarchitectures and with enhanced carrier separation through the n-type ZnO and the p-type Cu2O heterojunction. Properly chosen biologic photonic nanoarchitectures in combination with carefully selected photocatalyst(s) can significantly increase the photodegradation of pollutants in water under visible light illumination. LA - English DB - MTMT ER - TY - CONF AU - T. Biró, Katalin AU - Szakmány, György AU - Illés, Levente AU - Kovács, Zoltán AU - Harsányi, Ildikó AU - Szilágyi, Veronika ED - Dias, Isabel TI - Archaeometric investigations on Lengyel culture (Late Neolithic-Early Copper Age) polished stone tools from the iconic Lengyel site (SW Hungary) (Poster S4-P10.1515) T2 - Book of Abstracts PY - 2022 SP - 108 EP - 108 PG - 1 UR - https://m2.mtmt.hu/api/publication/33296726 ID - 33296726 LA - English DB - MTMT ER - TY - JOUR AU - SHIVA SHANKAR, LAKSHMI AU - Zalka, Dóra AU - Szabó, Tamás AU - Kózelné Székely, Edit AU - Kőrösi, Márton AU - Pászti, Zoltán AU - Balázsi, Katalin AU - Illés, Levente AU - Czigány, Zsolt AU - Kun, Róbert TI - Supercritical carbon dioxide assisted synthesis of ultra-stable sulfur/carbon composite cathodes for Li– S batteries JF - MATERIALS TODAY CHEMISTRY J2 - MATER TODAY CHEM VL - 26 PY - 2022 PG - 13 SN - 2468-5194 DO - 10.1016/j.mtchem.2022.101240 UR - https://m2.mtmt.hu/api/publication/33215064 ID - 33215064 AB - To mitigate the shuttle effect and enhance the electrical conductivity in lithium battery cathode, the unique characteristics of supercritical CO2 solvent (SC–CO2) and the distinctive porous and layered microstructure of reduced graphene oxide (rGO) are exploited in the fabrication of a high-performance rGO/sulfur composite cathode. Exploiting SC-CO2 technology can realize highly efficient sulfur transfer and precise microstructure regulation of S/C composite cathodes for Li–S batteries. On exposure, due to the sudden pressure release process, the SC-CO2 expands the interlayers of rGO rendering plenty of storage space for small sulfur allotropes in carbon matrices which increases the active sulfur loading. Being a remarkable hydrophobic solvent, the wetting properties of SC-CO2 are excellent, ensuring sulfur dissolution and penetration deep into the voids and interlayers of rGO. This creates intimate contact of sulfur with rGO interlayers, guaranteeing precise sulfur content, uniform sulfur distribution, and strong interaction between sulfur and carbon leading to enhanced electrical conductivity and sulfur utilization efficiency. Another important feature is that the S/C composites can be prepared at room temperature, unlike other conventional techniques which require a higher temperature. Moreover, the product mixture can be separated simply by de-pressuring SC-CO2. Herein, the rGO/sulfur composite cathode prepared on a lab scale showed an initial discharge capacity of 1024 mAh/g at 0.1C rate with capacity retention of 92.2% and coulombic efficiency of 99% even after 200 charge-discharge cycles. The developed cells showed excellent performance (929 mAh/g at 1 C rate) with an ultralow decay of 0.04% per cycle even after 200 charge-discharge cycles. Through this work, we believe that the synergistic effect of SC-CO2 technology and rGO as sulfur host will open up a promising future for the synthesis of efficient S/C composite cathodes with ultra-high cycling stability. LA - English DB - MTMT ER - TY - JOUR AU - Németh, Péter AU - Lancaster, HJ. AU - Salzmann, CG. AU - McColl, K AU - Fogarassy, Zsolt AU - Garvie, LAJ. AU - Illés, Levente AU - Pécz, Béla AU - Murri, M AU - Corà, F AU - Smith, RL. AU - Mezouar, M AU - Howard, CA. AU - McMillan, PF. TI - Shock-formed carbon materials with intergrown sp3- and sp2-bonded nanostructured units JF - PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA J2 - P NATL ACAD SCI USA VL - 119 PY - 2022 IS - 30 PG - 9 SN - 0027-8424 DO - 10.1073/pnas.2203672119 UR - https://m2.mtmt.hu/api/publication/33025102 ID - 33025102 AB - Diamond is the hardest material found in nature. Its applications range from abrasives and electronics to nanomedicine and laser technology. The common form of diamond is cubic. Yet, dense carbon materials formed by shock compression have been described as hexagonal diamond or lonsdaleite. This study provides a structural understanding of lonsdaleite and demonstrates the existence of bulk materials containing extensive regions of nanostructured diamond and graphene-like intergrowths called diaphites. The structural complexities found in Canyon Diablo iron meteorite diamonds occur in a wide range of carbonaceous materials, and their identification can place constraints on the pressure?temperature conditions experienced during an impact. The predicted advanced properties of such materials highlight their potential use in future engineering applications. Studies of dense carbon materials formed by bolide impacts or produced by laboratory compression provide key information on the high-pressure behavior of carbon and for identifying and designing unique structures for technological applications. However, a major obstacle to studying and designing these materials is an incomplete understanding of their fundamental structures. Here, we report the remarkable structural diversity of cubic/hexagonally (c/h) stacked diamond and their association with diamond-graphite nanocomposites containing sp3-/sp2-bonding patterns, i.e., diaphites, from hard carbon materials formed by shock impact of graphite in the Canyon Diablo iron meteorite. We show evidence for a range of intergrowth types and nanostructures containing unusually short (0.31 nm) graphene spacings and demonstrate that previously neglected or misinterpreted Raman bands can be associated with diaphite structures. Our study provides a structural understanding of the material known as lonsdaleite, previously described as hexagonal diamond, and extends this understanding to other natural and synthetic ultrahard carbon phases. The unique three-dimensional carbon architectures encountered in shock-formed samples can place constraints on the pressure?temperature conditions experienced during an impact and provide exceptional opportunities to engineer the properties of carbon nanocomposite materials and phase assemblages. LA - English DB - MTMT ER - TY - JOUR AU - Merkel, Dániel AU - Hegedűs, Gergő AU - Gracheva, Maria AU - Deák, András AU - Illés, Levente AU - Németh, Attila AU - Maccari, F. AU - Radulov, I. AU - Major, Márton AU - Chumakov, A.I. AU - Bessas, D. AU - Nagy, Dénes Lajos AU - Zolnai, Zsolt AU - Graning, S. AU - Sájerman, K. AU - Szilágyi, Edit AU - Lengyel, Attila TI - A Three-Dimensional Analysis of Magnetic Nanopattern Formation in FeRh Thin Films on MgO Substrates: Implications for Spintronic Devices JF - ACS APPLIED NANO MATERIALS J2 - ACS APPL NANO MATER VL - 5 PY - 2022 IS - 4 SP - 5516 EP - 5526 PG - 11 SN - 2574-0970 DO - 10.1021/acsanm.2c00511 UR - https://m2.mtmt.hu/api/publication/32836598 ID - 32836598 LA - English DB - MTMT ER - TY - JOUR AU - Szilágyi, Veronika AU - Illés, Levente AU - T. Biró, Katalin AU - Péntek, Attila AU - Harsányi, Ildikó AU - Sági, Tamás AU - Kovács, Zoltán AU - Fehér, Kristóf AU - Szakmány, György TI - A Cserhát-Cserhátalja-Gödöllői-dombság-Mátraalja vidékéről származó csiszolt kőeszközök előzetes archeometriai vizsgálati eredményei / Preliminary archaeometrical results on some polished stone artefacts from Northern Hungary (Cserhát Mts. and foothill region, Mátra foothill region and Gödöllő hills) JF - ARCHEOMETRIAI MŰHELY J2 - ARCHEOMETRIAI MŰHELY VL - 18 PY - 2021 IS - 3 SP - 237 EP - 260 PG - 24 SN - 1786-271X DO - 10.55023/issn.1786-271X.2021-018 UR - https://m2.mtmt.hu/api/publication/32918042 ID - 32918042 LA - Hungarian DB - MTMT ER -