@article{MTMT:34776265,
	title = {Change in Superparamagnetic State Induced by Swift Heavy Ion Irradiation in Nano-Maghemite},
	url = {https://m2.mtmt.hu/api/publication/34776265},
	author = {Stichleutner, Sándor and Herczeg, Bence and Pechoušek, Jiří and Machala, Libor and Homonnay, Zoltán and Smrčka, David and Kouřil, Lukáš and Vondrášek, René and Kudor, Mátyás and Skuratov, Vladimir A. and Krupa, Luboš and Kubuki, Shiro and Kuzmann, Ernő},
	doi = {10.3390/met14040421},
	journal-iso = {METALS-BASEL},
	journal = {METALS},
	volume = {14},
	unique-id = {34776265},
	abstract = {The effect of swift heavy ion irradiation on sol–gel-prepared maghemite nanoparticles was studied by 57Fe transmission Mössbauer spectroscopy and X-ray diffractometry (XRD). The room temperature Mössbauer spectra of the non-irradiated nano-maghemite showed poorly resolved magnetically split, typical relaxation spectra due to the superparamagnetic state of the nanoparticles. Significant changes in the line shape, indicating changes in the superparamagnetic state, were found in the Mössbauer spectra upon irradiation by 160 MeV and 155 MeV 132Xe26+ ions with fluences of 5 × 1013 ion cm−2 and 1 × 1014 ion cm−2. XRD of the irradiated maghemite nanoparticles showed a significant broadening of the corresponding lines, indicating a decrease in the crystallite size, compared to those of the non-irradiated ones. The results are discussed in terms of the defects induced by irradiation and the corresponding changes related to the change in particle size and consequently in the superparamagnetic state caused by irradiation.},
	year = {2024},
	eissn = {2075-4701},
	pages = {421},
	orcid-numbers = {Pechoušek, Jiří/0000-0003-1566-4718; Machala, Libor/0000-0001-5630-6955; Homonnay, Zoltán/0000-0001-5299-5394; Kouřil, Lukáš/0000-0001-5766-0083; Skuratov, Vladimir A./0000-0002-9016-8370; Kubuki, Shiro/0000-0001-8255-7811; Kuzmann, Ernő/0000-0002-0183-6649}
}

@article{MTMT:34753165,
	title = {Insight into the Structure and Redox Chemistry of [Carbonatotetraamminecobalt(III)] Permanganate and Its Monohydrate as Co-Mn-Oxide Catalyst Precursors of the Fischer-Tropsch Synthesis},
	url = {https://m2.mtmt.hu/api/publication/34753165},
	author = {Béres, Kende Attila and Dürvanger, Zsolt and Homonnay, Zoltán and Nagyné Bereczki, Laura and Barta Holló, Berta and Farkas, Attila and Petruševski, Vladimir M. and Kótai, László},
	doi = {10.3390/inorganics12040094},
	journal-iso = {INORGANICS},
	journal = {INORGANICS},
	volume = {12},
	unique-id = {34753165},
	abstract = {[Carbonatotetraamminecobalt(III)] permanganate monohydrate was synthesized first in the metathesis reaction of [Co(NH3)4CO3]NO3 and NaMnO4 in aqueous solution. Its thermal dehydration at 100 °C resulted in phase-pure [Co(NH3)4CO3]MnO4 (compound 1). Compounds 1 and 2 (i.e., the hydrated form) were studied with IR, far-IR, and low-temperature Raman spectroscopies, and their vibrational modes were assigned. The lattice parameters were determined by powder X-ray diffraction (PXRD) and single crystal X-ray diffraction (SXRD) methods for the triclinic and orthorhombic compounds 1 and 2, respectively. The detailed structure of compound 2 was determined, and the role of hydrogen bonds in the structural motifs was clarified. UV studies on compounds 1 and 2 showed the distortion of the octahedral geometry of the complex cation during dehydration because of the partial loss of the hydrogen bonds between the crystal water and the ligands of the complex cation. The thermal decomposition consists of a solid phase quasi-intramolecular redox reaction between the ammonia ligands and permanganate anions with the formation of ammonia oxidation products (H2O, NO, N2O, and CO2). The solid phase reaction product is amorphous cobalt manganese oxide containing ammonium, carbonate (and nitrate) anions. The temperature-controlled thermal decomposition of compound 2 in toluene at 110 °C showed that one of the decomposition intermediates is ammonium nitrate. The decomposition intermediates are transformed into Co1.5Mn1.5O4 spinel with MnCo2O4 structure upon further heating. Solid compound 2 gave the spinel at 500 °C both in an inert and air atmosphere, whereas the sample pre-treated in toluene at 110 °C without and with the removal of ammonium nitrate by aqueous washing, gave the spinel already at 300 and 400 °C, respectively. The molten NH4NO3 is a medium to start spinel crystallization, but its decomposition stops further crystal growth of the spinel phase. By this procedure, the particle size of the spinel product as low as ~4.0 nm could be achieved for the treatments at 300 and 400 °C, and it increased only to 5.7 nm at 500 °C. The nano-sized mixed cobalt manganese oxides are potential candidates as Fischer-Tropsch catalysts.},
	year = {2024},
	eissn = {2304-6740},
	pages = {94},
	orcid-numbers = {Béres, Kende Attila/0000-0003-4257-0581; Dürvanger, Zsolt/0000-0002-2652-4916; Homonnay, Zoltán/0000-0001-5299-5394; Barta Holló, Berta/0000-0002-5786-442X; Farkas, Attila/0000-0002-8877-2587}
}

@article{MTMT:34718662,
	title = {Hexakis(urea-O)iron Complex Salts as a Versatile Material Family: Overview of Their Properties and Applications},
	url = {https://m2.mtmt.hu/api/publication/34718662},
	author = {Béres, Kende Attila and Homonnay, Zoltán and Kótai, László},
	doi = {10.1021/acsomega.3c09635},
	journal-iso = {ACS OMEGA},
	journal = {ACS OMEGA},
	volume = {9},
	unique-id = {34718662},
	issn = {2470-1343},
	year = {2024},
	eissn = {2470-1343},
	pages = {11148-11167},
	orcid-numbers = {Béres, Kende Attila/0000-0003-4257-0581; Homonnay, Zoltán/0000-0001-5299-5394}
}

@article{MTMT:34684508,
	title = {Debye Temperature Evaluation for Secondary Battery Cathode of α-SnxFe1−xOOH Nanoparticles Derived from the 57Fe- and 119Sn-Mössbauer Spectra},
	url = {https://m2.mtmt.hu/api/publication/34684508},
	author = {Ibrahim, Ahmed and Tani, Kaoru and Hashi, Kanae and Zhang, Bofan and Homonnay, Zoltán and Kuzmann, Ernő and Bafti, Arijeta and Pavić, Luka and Krehula, Stjepko and Marciuš, Marijan and Kubuki, Shiro},
	doi = {10.3390/ijms25052488},
	journal-iso = {INT J MOL SCI},
	journal = {INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES},
	volume = {25},
	unique-id = {34684508},
	issn = {1661-6596},
	abstract = {Debye temperatures of α-SnxFe1−xOOH nanoparticles (x = 0, 0.05, 0.10, 0.15 and 0.20, abbreviated as Sn100x NPs) prepared by hydrothermal reaction were estimated with 57Fe- and 119Sn-Mössbauer spectra measured by varying the temperature from 20 to 300 K. Electrical properties were studied by solid-state impedance spectroscopy (SS-IS). Together, the charge–discharge capacity of Li- and Na-ion batteries containing Sn100x NPs as a cathode were evaluated. 57Fe-Mössbauer spectra of Sn10, Sn15, and Sn20 measured at 300 K showed only one doublet due to the superparamagnetic doublet, while the doublet decomposed into a sextet due to goethite at the temperature below 50 K for Sn 10, 200 K for Sn15, and 100 K for Sn20. These results suggest that Sn10, Sn15 and Sn20 had smaller particles than Sn0. On the other hand, 20 K 119Sn-Mössbauer spectra of Sn15 were composed of a paramagnetic doublet with an isomer shift (δ) of 0.24 mm s−1 and quadrupole splitting (∆) of 3.52 mm s−1. These values were larger than those of Sn10 (δ: 0.08 mm s−1, ∆: 0.00 mm s−1) and Sn20 (δ: 0.10 mm s−1, ∆: 0.00 mm s−1), suggesting that the SnIV-O chemical bond is shorter and the distortion of octahedral SnO6 is larger in Sn15 than in Sn10 and Sn20 due to the increase in the covalency and polarization of the SnIV-O chemical bond. Debye temperatures determined from 57Fe-Mössbauer spectra measured at the low temperature were 210 K, 228 K, and 250 K for Sn10, Sn15, and Sn20, while that of α-Fe2O3 was 324 K. Similarly, the Debye temperature of 199, 251, and 269 K for Sn10, Sn15, and Sn20 were estimated from the temperature-dependent 119Sn-Mössbauer spectra, which were significantly smaller than that of BaSnO3 (=658 K) and SnO2 (=382 K). These results suggest that Fe and Sn are a weakly bound lattice in goethite NPs with low crystallinity. Modification of NPs and addition of Sn has a positive effect, resulting in an increase in DC conductivity of almost 5 orders of magnitude, from a σDC value of 9.37 × 10−7 (Ω cm)−1 for pure goethite Sn (Sn0) up to DC plateau for samples containing 0.15 and 0.20 Sn (Sn15 and Sn20) with a DC value of ~4 × 10−7 (Ω cm)−1 @423 K. This non-linear conductivity pattern and levelling at a higher Sn content suggests that structural modifications have a notable impact on electron transport, which is primarily governed by the thermally activated via three-dimensional hopping of small polarons (SPH). Measurements of SIB performance, including the Sn100x cathode under a current density of 50 mA g−1, showed initial capacities of 81 and 85 mAh g−1 for Sn0 and Sn15, which were larger than the others. The large initial capacities were measured at a current density of 5 mA g−1 found at 170 and 182 mAh g−1 for Sn15 and Sn20, respectively. It is concluded that tin-goethite NPs are an excellent material for a secondary battery cathode and that Sn15 is the best cathode among the studied Sn100x NPs.},
	year = {2024},
	eissn = {1422-0067},
	orcid-numbers = {Ibrahim, Ahmed/0000-0002-5300-0376; Homonnay, Zoltán/0000-0001-5299-5394; Kuzmann, Ernő/0000-0002-0183-6649; Bafti, Arijeta/0000-0001-7343-1299; Pavić, Luka/0000-0003-2232-6602; Marciuš, Marijan/0000-0002-4747-5981; Kubuki, Shiro/0000-0001-8255-7811}
}

@article{MTMT:34538304,
	title = {Revealing the nuclearity of iron citrate complexes at biologically relevant conditions},
	url = {https://m2.mtmt.hu/api/publication/34538304},
	author = {Gracheva, Maria and Klencsár, Zoltán and Homonnay, Zoltán and Solti, Ádám and Péter, László and Machala, L. and Novak, P. and Kovács, Krisztina},
	doi = {10.1007/s10534-023-00562-1},
	journal-iso = {BIOMETALS},
	journal = {BIOMETALS},
	unique-id = {34538304},
	issn = {0966-0844},
	year = {2024},
	eissn = {1572-8773},
	orcid-numbers = {Gracheva, Maria/0000-0001-5245-8425; Klencsár, Zoltán/0000-0003-0175-7024; Homonnay, Zoltán/0000-0001-5299-5394; Solti, Ádám/0000-0003-1479-5492; Péter, László/0000-0001-5604-0982; Kovács, Krisztina/0000-0003-0018-1860}
}

@article{MTMT:34160976,
	title = {ANALYSIS OF THE IRON STATES IN IRON-CONTAINING PHARMACEUTICAL PRODUCTS USING MÖSSBAUER SPECTROSCOPY},
	url = {https://m2.mtmt.hu/api/publication/34160976},
	author = {Alenkina, Irina V. and Chukin, Andrey V. and Leitus, Gregory and Denisova, Olga V. and Gracheva, Maria and Felner, Israel and Kuzmann, Ernő and Homonnay, Zoltán and Oshtrakh, Michael I.},
	doi = {10.1016/j.jpba.2023.115745},
	journal-iso = {J PHARMACEUT BIOMED ANAL},
	journal = {JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS},
	volume = {237},
	unique-id = {34160976},
	issn = {0731-7085},
	year = {2024},
	eissn = {1873-264X},
	orcid-numbers = {Gracheva, Maria/0000-0001-5245-8425; Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394; Oshtrakh, Michael I./0000-0002-2937-5194}
}

@article{MTMT:34323900,
	title = {Comparison of two pharmaceutical products containing ferrous sulfate using Mössbauer spectroscopy},
	url = {https://m2.mtmt.hu/api/publication/34323900},
	author = {Oshtrakh, Michael I. and Alenkina, Irina V. and Chukin, Andrey V. and Kuzmann, Ernő and Homonnay, Zoltán},
	doi = {10.1007/s10751-023-01835-4},
	journal-iso = {HYPERFINE INTERACT},
	journal = {HYPERFINE INTERACTIONS},
	volume = {244},
	unique-id = {34323900},
	issn = {0304-3843},
	year = {2023},
	eissn = {1572-9540},
	orcid-numbers = {Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394}
}

@article{MTMT:34266835,
	title = {Analysis of the differential nonlinearity for the velocity driving systems in Mössbauer spectrometers using thin α-Fe reference absorber},
	url = {https://m2.mtmt.hu/api/publication/34266835},
	author = {Oshtrakh, Michael I. and Kuzmann, Ernő and Homonnay, Zoltán and Semionkin, Vladimir A.},
	doi = {10.1007/s10751-023-01831-8},
	journal-iso = {HYPERFINE INTERACT},
	journal = {HYPERFINE INTERACTIONS},
	volume = {244},
	unique-id = {34266835},
	issn = {0304-3843},
	year = {2023},
	eissn = {1572-9540},
	orcid-numbers = {Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394}
}

@article{MTMT:34213280,
	title = {Structural, Electrical, and Electrochemical Properties of a Na2O-V2O5 Ceramic Nanocomposite as an Active Cathode Material for a Na-Ion Battery},
	url = {https://m2.mtmt.hu/api/publication/34213280},
	author = {Ibrahim, Ahmed and Watanabe, Satoshi and Razum, Marta and Pavić, Luka and Homonnay, Zoltán and Kuzmann, Ernő and Hassaan, Mohamed Yousry and Kubuki, Shiro},
	doi = {10.3390/cryst13101521},
	journal-iso = {CRYSTALS},
	journal = {CRYSTALS},
	volume = {13},
	unique-id = {34213280},
	abstract = {In this paper, a relationship between the structure and the electrical properties of a nanocrystalline composite ceramics xNa2O·(100 − x)V2O5 with ‘x’ of 5, 15, 25, 35, and 45 mol%, abbreviated as xNV, was investigated by X-ray diffractometry (XRD), X-ray absorption spectroscopy (XAS), Cyclic Voltammetry (CV), Electrochemical impedance spectroscopy (EIS), and cathode active performance in Na-ion battery (SIB). For the expected sodium vanadium bronzes (NaxV2O5) precipitation, the preparation of xNV was performed by keeping the system in the molten state at 1200 °C for one hour, followed by a temperature decrease in the electric furnace to room temperature at a cooling rate of 10 °C min−1. XRD patterns of the 15NV ceramic exhibited the formation of Na0.33V2O5 and NaV3O8 crystalline phases. Moreover, the V K-edge XANES showed that the absorption edge energy of ceramics 15NV recorded at 5479 eV is smaller than that of V2O5 at 5481 eV, evidently indicating a partial reduction from V5+ to V4+ due to the precipitation of Na0.33V2O5. In the cyclic voltammetry, reduction peaks of 15NV were observed at 1.12, 1.78 V, and 2.69 V, while the oxidation peak showed up only at 2.36 V. The values of the reduction peaks were related to the NaV3O8 crystalline phase. Moreover, the diffusion coefficient of Na+ (DNa+) gradually decreased from 8.28 × 10−11 cm2 s−1 to 1.23 × 10−12 cm2 s−1 with increasing Na2O content (x) from 5 to 45 mol%. In the evaluation of the active cathode performance of xNV in SIB, ceramics 15NV showed the highest discharge capacity 203 mAh g−1 at a current rate of 50 mA g−1. In the wider voltage range from 0.8 to 3.6 V, the capacity retention was maintained at 50% after 30 cycles, while it was significantly improved to 90% in the narrower voltage range from 1.8 to 4.0 V, although the initial capacity decreased to 56 mAh g−1. It is concluded that the precipitation of the Na0.33V2O5 phase improved the structural and electrical properties of 15NV, which provides a high capacity for the Na-ion battery when incorporated as a cathode active material.},
	year = {2023},
	eissn = {2073-4352},
	orcid-numbers = {Ibrahim, Ahmed/0000-0002-5300-0376; Pavić, Luka/0000-0003-2232-6602; Homonnay, Zoltán/0000-0001-5299-5394; Kuzmann, Ernő/0000-0002-0183-6649; Kubuki, Shiro/0000-0001-8255-7811}
}

@article{MTMT:34194400,
	title = {STUDY OF GIBEON IVA IRON METEORITE BY SCANNING ELECTRON MICROSCOPY, X-RAY DIFFRACTION, MAGNETIZATION MEASUREMENTS AND MOSSBAUER SPECTROSCOPY},
	url = {https://m2.mtmt.hu/api/publication/34194400},
	author = {Goryunov, M. V. and Varga, G. and Dankházi, Zoltán and Felner, I. and Chukin, A. V. and Kuzmann, Ernő and Homonnay, Zoltán and Grokhovsky, V. I. and Oshtrakh, M. I.},
	journal-iso = {METEORIT PLANET SCI},
	journal = {METEORITICS & PLANETARY SCIENCE},
	volume = {58},
	unique-id = {34194400},
	issn = {1086-9379},
	year = {2023},
	eissn = {1945-5100},
	pages = {A108-A108},
	orcid-numbers = {Dankházi, Zoltán/0000-0001-9545-2015; Kuzmann, Ernő/0000-0002-0183-6649; Homonnay, Zoltán/0000-0001-5299-5394}
}