TY - JOUR AU - Datz, Dániel AU - Németh, Gergely AU - Rátkai, László AU - Pekker, Áron AU - Kamarás, Katalin TI - Generalized Mie Theory for Full-Wave Numerical Calculations of Scattering Near-Field Optical Microscopy with Arbitrary Geometries JF - PHYSICA STATUS SOLIDI - RAPID RESEARCH LETTERS J2 - PHYS STATUS SOLIDI-R PY - 2024 PG - 6 SN - 1862-6254 DO - 10.1002/pssr.202300370 UR - https://m2.mtmt.hu/api/publication/34441266 ID - 34441266 LA - English DB - MTMT ER - TY - JOUR AU - Pethes, Ildikó ED - Kamarás, Katalin / Interviewed person TI - Kamarás Katalin az első Széchenyi-díjas fizikusnő JF - FIZIKAI SZEMLE J2 - FIZIKAI SZEMLE VL - 73 PY - 2023 IS - 7-8 SP - 274 EP - 278 PG - 5 SN - 0015-3257 UR - https://m2.mtmt.hu/api/publication/34485928 ID - 34485928 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Czene, Szabolcs AU - Jegenyés, Nikoletta AU - Homokiné Krafcsik, Olga AU - Lenk, Sándor AU - Czigány, Zsolt AU - Bortel, Gábor AU - Kamarás, Katalin AU - Rohonczy, János AU - Beke, Dávid AU - Gali, Ádám TI - Amino-Termination of Silicon Carbide Nanoparticles JF - NANOMATERIALS J2 - NANOMATERIALS-BASEL VL - 13 PY - 2023 IS - 13 PG - 17 SN - 2079-4991 DO - 10.3390/nano13131953 UR - https://m2.mtmt.hu/api/publication/34040657 ID - 34040657 AB - Silicon carbide nanoparticles (SiC NPs) are promising inorganic molecular-sized fluorescent biomarkers. It is imperative to develop methods to functionalize SiC NPs for certain biological applications. One possible route is to form amino groups on the surface, which can be readily used to attach target biomolecules. Here, we report direct amino-termination of aqueous SiC NPs. We demonstrate the applicability of the amino-terminated SiC NPs by attaching bovine serum albumin as a model for functionalization. We monitor the optical properties of the SiC NPs in this process and find that the fluorescence intensity is very sensitive to surface termination. Our finding may have implications for a few nanometers sized SiC NPs containing paramagnetic color centers with optically read electron spins. LA - English DB - MTMT ER - TY - JOUR AU - Lázár, Anett AU - Molnár, Zsombor AU - Demény, Attila AU - Kótai, László AU - Trif, László AU - Béres, Kende Attila AU - Bódis, Eszter AU - Bortel, Gábor AU - Aradi, László Előd AU - Karlik, Máté AU - Szabó, Máté Zoltán AU - Pekker, Áron AU - Németh, Gergely AU - Kamarás, Katalin AU - Garvie, L.A.J. AU - Németh, Péter TI - Insights into the amorphous calcium carbonate (ACC) → ikaite → calcite transformations JF - CRYSTENGCOMM J2 - CRYSTENGCOMM VL - 25 PY - 2023 IS - 3 SP - 738 EP - 750 PG - 13 SN - 1466-8033 DO - 10.1039/d2ce01444k UR - https://m2.mtmt.hu/api/publication/33606758 ID - 33606758 LA - English DB - MTMT ER - TY - JOUR AU - Cadena Nogales, Ana Cristina AU - Pekker, Áron AU - Botka, Bea AU - Dodony, Erzsébet AU - Fogarassy, Zsolt AU - Pécz, Béla AU - Kamarás, Katalin TI - Encapsulation of the Graphene Nanoribbon Precursor 1, 2, 4‐trichlorobenzene in Boron Nitride Nanotubes at Room Temperature JF - PHYSICA STATUS SOLIDI - RAPID RESEARCH LETTERS J2 - PHYS STATUS SOLIDI-R VL - 17 PY - 2023 IS - 1 PG - 5 SN - 1862-6254 DO - 10.1002/pssr.202200284 UR - https://m2.mtmt.hu/api/publication/33138741 ID - 33138741 LA - English DB - MTMT ER - TY - JOUR AU - Pálinkás, András AU - Kálvin, György AU - Vancsó, Péter AU - Kandrai, Konrád AU - Szendrő, Márton AU - Németh, Gergely AU - Németh, Miklós AU - Pekker, Áron AU - Pap, József Sándor AU - Petrik, Péter AU - Kamarás, Katalin AU - Tapasztó, Levente AU - Nemes Incze, Péter TI - The composition and structure of the ubiquitous hydrocarbon contamination on van der Waals materials JF - NATURE COMMUNICATIONS J2 - NAT COMMUN VL - 13 PY - 2022 IS - 1 PG - 10 SN - 2041-1723 DO - 10.1038/s41467-022-34641-7 UR - https://m2.mtmt.hu/api/publication/33226497 ID - 33226497 AB - The behavior of single layer van der Waals (vdW) materials is profoundly influenced by the immediate atomic environment at their surface, a prime example being the myriad of emergent properties in artificial heterostructures. Equally significant are adsorbates deposited onto their surface from ambient. While vdW interfaces are well understood, our knowledge regarding atmospheric contamination is severely limited. Here we show that the common ambient contamination on the surface of: graphene, graphite, hBN and MoS2 is composed of a self-organized molecular layer, which forms during a few days of ambient exposure. Using low-temperature STM measurements we image the atomic structure of this adlayer and in combination with infrared spectroscopy identify the contaminant molecules as normal alkanes with lengths of 20-26 carbon atoms. Through its ability to self-organize, the alkane layer displaces the manifold other airborne contaminant species, capping the surface of vdW materials and possibly dominating their interaction with the environment. LA - English DB - MTMT ER - TY - JOUR AU - Cadena Nogales, Ana Cristina AU - Botka, Bea AU - Pekker, Áron AU - Tschannen, CD AU - Lombardo, C AU - Novotny, L AU - Khlobystov, AN AU - Kamarás, Katalin TI - Molecular Encapsulation from the Liquid Phase and Graphene Nanoribbon Growth in Carbon Nanotubes JF - JOURNAL OF PHYSICAL CHEMISTRY LETTERS J2 - J PHYS CHEM LETT VL - 13 PY - 2022 IS - 41 SP - 9752 EP - 9758 PG - 7 SN - 1948-7185 DO - 10.1021/acs.jpclett.2c02046 UR - https://m2.mtmt.hu/api/publication/33200914 ID - 33200914 LA - English DB - MTMT ER - TY - JOUR AU - Özeren, Mehmet Derya AU - Pekker, Áron AU - Kamarás, Katalin AU - Botka, Bea TI - Evaluation of surface passivating solvents for single and mixed halide perovskites JF - RSC ADVANCES J2 - RSC ADV VL - 12 PY - 2022 IS - 44 SP - 28853 EP - 28861 PG - 9 SN - 2046-2069 DO - 10.1039/d2ra04278a UR - https://m2.mtmt.hu/api/publication/33168634 ID - 33168634 AB - Surface passivation is one of the commonly used approaches to reduce the density of defects on the surfaces and interfaces hindering the performance and stability of perovskite optoelectronic devices. Although surface passivation leads to performance improvement for the targeted devices, details of the complex intermolecular interactions occurring between the molecules and perovskites are not entirely known. Here, we investigated a variety of commonly used solvents in the post-processing of perovskites by using photoluminescence (PL) spectroscopy on single and mixed halide perovskites (MAPbI(3), MAPbBr(3) and MAPb(Br0.5I0.5)(3)). Our results show that solvents with medium and low Gutmann donor and acceptor numbers provide PL intensity increase for both single halide perovskites by passivating the surface defect sites. Among the single halide perovskites, MAPbBr(3) is more attracted to hydrogen bonding solvents, in contrast to MAPbI(3) that is preferred by Lewis bases. This halide selective attraction also has an influence on the mixed-halide composition. Identifying these interaction mechanisms provides new insights into passivating the surface of perovskites for future device design. LA - English DB - MTMT ER - TY - JOUR AU - Rudolf, Mátyás AU - Bortel, Gábor AU - Márkus, Bence Gábor AU - Jegenyés, Nikoletta AU - Verkhovlyuk, Vladimir AU - Kamarás, Katalin AU - Simon, Ferenc AU - Gali, Ádám AU - Beke, Dávid TI - Optimization of Chromium-Doped Zinc Gallate Nanocrystals for Strong Near-Infrared Emission by Annealing JF - ACS APPLIED NANO MATERIALS J2 - ACS APPL NANO MATER VL - 5 PY - 2022 IS - 7 SP - 8950 EP - 8961 PG - 12 SN - 2574-0970 DO - 10.1021/acsanm.2c01156 UR - https://m2.mtmt.hu/api/publication/33034499 ID - 33034499 AB - Chromium-doped spinel crystals show long-lasting emissions in the near-infrared wavelength region. The emission can be activated by X-ray or ultraviolet-visible (UV-visible) light. Such properties make this material a promising candidate for background-free deep-tissue bioimaging, photodynamic or photon induced therapy, and other applications. Here, we apply hydro thermal synthesis for the preparation of Cr-doped zinc gallate (ZnGa2O4) nanoparticles of small sizes with around 10 nm in diameter, which has the potential to be intravenously introduced to patients. We find that annealing of the as-prepared nanoparticles at 800 ? yields an order of magnitude increase in the emission intensity in the near-infrared wavelength region upon X-ray exposure with favorable long-lasting photoluminescence, which may be directly employed for deep-tissue cancer treatments when combined with IR700-mAb conjugate drug agents. We discuss the effect of annealing on the structural changes and the evolution of Cr defects of 10 nm Cr-doped zinc gallate nanoparticles by imaging techniques and monitoring their magneto-optical signals. LA - English DB - MTMT ER - TY - JOUR AU - Abia, C. AU - López, C.A. AU - Gainza, J. AU - Rodrigues, J.E.F.S. AU - Ferrer, M.M. AU - Nemes, N.M. AU - Dura, O.J. AU - Martínez, J.L. AU - Fernández-Díaz, M.T. AU - Álvarez-Galván, C. AU - Németh, Gergely AU - Kamarás, Katalin AU - Fauth, F. AU - Alonso, J.A. TI - The structural evolution, optical gap, and thermoelectric properties of the RbPb2Br5 layered halide, prepared by mechanochemistry JF - JOURNAL OF MATERIALS CHEMISTRY C J2 - J MATER CHEM C VL - 10 PY - 2022 IS - 17 SP - 6857 EP - 6865 PG - 9 SN - 2050-7526 DO - 10.1039/d2tc00653g UR - https://m2.mtmt.hu/api/publication/32836949 ID - 32836949 LA - English DB - MTMT ER -