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001-es BibID:	BIBFORM120502
035-os BibID:	(Scopus)85139019757 (WoS)000876813100005
Első szerző:	Fouad, Suzan Salad
Cím:	Microstructural and optical duality of TiO2/Cu/TiO2 trilayer films grown by atomic layer deposition and DC magnetron sputtering / S.S. Fouad, Eszter Baradács, M. Nabil, Bence Parditka, S. Negm, Zoltán Erdélyi
Dátum:	2022
ISSN:	1387-7003
Megjegyzések:	In this research, we report a comparative study of trilayer TiO2(60 nm)/Cu/TiO2(60 nm) thin film as a function of different Cu interlayer thickness (20, 40 and 60 nm), fabricated by atomic layer deposition (ALD) and DC magnetron sputtering. The surface morphology, elemental information and optical properties, were tested as a function of Cu interlayer thickness by scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDX) and double beam spectrophotometer (UV?vis) respectively.The growth mechanism and the microstructural conversion were investigated. The absorption spectrum was mesured and used to calculate the energy band gap (Eg). The obtained results show that the increase of the Cu interlayer enhance the activity of photocatalysis by employing distinct modification strategies to decrease the indirect optical band gap energy from 2.85 to 1.86 eV, and conventionally making the photocatalyst efficient to absorb visible light range. The role of the optical energy band gap Eg as well as the average electronegativity (?) as basic parameters of optical basicity (?A) and refractive index (n) has been emphasized. Values of electronegativity (?), phase velocity (V) and transmission coefficient (TC) decreased, while the refractive index, optical basicity, electronic polarizability (?e), and reflection loss (RL) increased with increasing Cu interlayer thickness. A good agreement is observed among the selected parameters. The results demonstrate that the ALD and the DC magnetron sputtering are promising techniques for preparing TiO2/Cu/TiO2 thin films, with different thickness of copper (Cu), that can be used in low-cost mid-IR detection and can enhanced the properties of optoelectronic devices.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Band gap Interlayer Optical basicity Photocatalyst Titanium dioxide
Megjelenés:	Inorganic Chemistry Communications. - 145 (2022), p. 1-7. -
További szerzők:	Baradács Eszter (1974-) (fizikus) Nabil, M. Parditka Bence (1985-) (fizikus) Negm, S. Erdélyi Zoltán (1974-) (fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM085363
Első szerző:	Jószai Róbert (vegyész)
Cím:	Metal-metal bond or isolated metal centers? : Interaction of Hg(CN)2 with square planar transition metal cyanides / Róbert Jószai, Imre Beszeda, Attila C. Bényei, Andreas Fischer, Margit Kovács, Mikhail Maliarik, Péter Nagy, Andrey Shchukarev, Imre Tóth
Dátum:	2005
ISSN:	0020-1669 1520-510X
Megjegyzések:	Three adducts have been prepared from Hg(CN)2 and square planar MII(CN)42- transition metal cyanides (M ) Pt, Pd, or Ni, with d8 electron shell) as solids. The structure of the compounds K2PtHg(CN)6?2H2O( 1), Na2PdHg(CN)6?2H2O( 2), and K2NiHg(CN)6?2H2O( 3) have been studied by single-crystal X-ray diffraction, XPS, Raman spectroscopy, and luminescence spectroscopy in the solid state. The structure of K2PtHg(CN)6?2H2O consists of one-dimensional wires. No CN- bridges occur between the heterometallic centers. The wires are strictly linear, and the Pt(II) and Hg(II) centers alternate. The distance d Hg-Pt is relatively short, 3.460 ?A. Time-resolved luminescence spectra indicate that Hg(CN)2 units incorporated into the structure act as electron traps and shorten the lifetime of both the short-lived and longer-lived exited states in 1 compared to K2[Pt(CN)4]?2H2O. The structures of Na2PdHg(CN)6?2H2O and K2NiHg(CN)6?2H2O can be considered as double salts; the lack of heterometallophilic interaction between the remote Hg(II) and Pd(II) atoms, d Hg-Pd ) 4.92 ?A, and Hg(II) and Ni(II) atoms, d Hg-Ni ) 4.61 ?A, is apparent. Electron binding energy values of the metallic centers measured by XPS show that there is no electron transfer between the metal ions in the three adducts. In solution, experimental findings clearly indicate the lack of metal?metal bond formation in all studied HgII?CN-?MII(CN)42- systems (M ) Pt, Pd, or Ni).
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Inorganic Chemistry. - 44 : 26 (2005), p. 9643-9651. -
További szerzők:	Beszeda Imre (1966-) (okl. anyagtudományi mérnök-fizikus) Bényei Attila (1962-) (vegyész) Fischer, Andreas Kovács Margit Maliarik, Mikhail Nagy Péter (1976-) (vegyész) Shchukarev, Andrey Tóth Imre (1950-) (vegyész)
Pályázati támogatás:	T038296 OTKA T043365 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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