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Autor:
Dana Toloman, Adriana Florina Popa, Maria Miclaus, Alexandru R. Biris, Manuela Stan, O. Raita, Ramona-Crina Suciu
Publikováno v:
Optical Materials. 37:223-228
This paper reports the influence of doping degree and annealing temperature on XRD, Raman, EPR and PL spectra of Sn1−xVxO2 nanoparticles with x = 0, 0.01 and 0.05 annealed at 600 and 800 °C. XRD studies reveal a tetragonal rutile crystalline phase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::048bf2489e16577ff94b07b3695f23db
https://doi.org/10.1016/j.optmat.2014.05.032
https://doi.org/10.1016/j.optmat.2014.05.032
Autor:
Manuela Stan, Dana Toloman, Ovidiu Pana, T. D. Silipas, O. Raita, Adriana Florina Popa, L. M. Giurgiu
Publikováno v:
Journal of Alloys and Compounds. 591:201-206
A series of Sn0.99V0.01O2 powders were prepared and annealed at different temperatures: 450 C, 600 C, 800 C, 1000 C. The XRD measurements confirm the substitution of Sn 4+ ions by vanadium ions. A secondary phase of V2O5 was evidenced by Raman spectr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afc41c2eb90c032fabfa2ecbc33ed584
https://doi.org/10.1016/j.jallcom.2013.12.189
https://doi.org/10.1016/j.jallcom.2013.12.189
Autor:
Adriana Florina Popa, L. M. Giurgiu, Bogdan Stefan Vasile, O. Raita, Ovidiu Pana, A. Mesaros, T. D. Silipas, Dana Toloman
Publikováno v:
Journal of Alloys and Compounds. 551:502-507
This paper reports the influence of the temperature annealing ( T a ) on the structural, morphological, Raman and EPR characteristics of Mn-doped ZnO nanoparticles. XRD studies reveal a wurzite-type structure, while the formation of ZnMnO 3 secondary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd460086eddc04e12412c2438380a302
https://doi.org/10.1016/j.jallcom.2012.10.183
https://doi.org/10.1016/j.jallcom.2012.10.183
Autor:
Cristian Leostean, Dana Toloman, Bogdan Stefan Vasile, L. M. Giurgiu, Manuela Stan, Adriana Florina Popa, O. Raita
Publikováno v:
Journal of Alloys and Compounds. 551:300-305
This article reports the effects of the annealing temperature on the structural, morphological and spin dynamic properties of SnO 2 samples doped with 0.005 Mn. The samples were annealed at 400, 600, 700 and 800 °C and analyzed by XRD, TEM, XPS and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbbd9bc385b6daeea849f5bbefd84f80
https://doi.org/10.1016/j.jallcom.2012.10.007
https://doi.org/10.1016/j.jallcom.2012.10.007
Autor:
Manuela Stan, L. M. Giurgiu, Adriana Florina Popa, Alexandru R. Biris, O. Raita, Ramona-Crina Suciu
Publikováno v:
Applied Magnetic Resonance. 42:499-509
Ferromagnetic resonance (FMR) investigations of nanocrystalline Zn1−xFexO (x = 0.01, 0.03 and 0.05) powders are reported. Broad FMR signals with g factor >2 representing the signature of ferromagnetism were identified. In the temperature range of 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f55210e2b594a54e48ca40da2bc759da
https://doi.org/10.1007/s00723-012-0322-0
https://doi.org/10.1007/s00723-012-0322-0
Publikováno v:
Applied Magnetic Resonance. 42:453-462
Electron paramagnetic resonance (EPR) data on manganese-substituted tin dioxide (Mn:SnO2) samples are presented. The investigations show that the observed EPR spectra arise from three different contributions of Mn ions viz., (1) interstitial Mn2+ ion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::393d1b5a1c0a1bfeb49a912db94093eb
https://doi.org/10.1007/s00723-012-0319-8
https://doi.org/10.1007/s00723-012-0319-8
Publikováno v:
Journal of Physics and Chemistry of Solids. 73:221-226
Glasses in the system xFe2O3·(100−x) [45ZnO·55B2O3] (0≤x≤10 mol%) have been prepared by melting at 1200 °C and rapidly cooling at room temperature. The obtained samples were submitted to an additional thermal treatment at 570 °C for 12 h in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d578e5f0e44f7eade1d620e685d994bf
https://doi.org/10.1016/j.jpcs.2011.10.039
https://doi.org/10.1016/j.jpcs.2011.10.039
Autor:
Gh. Borodi, Attila Bende, O. Raita, I. Bratu, Simina Dreve, Irén Kacsó, Felicia Dragan, Adriana Florina Popa
Publikováno v:
Journal of Molecular Structure. 997:78-86
The use of chitosan as an excipient in oral formulations, as a drug delivery vehicle for ulcerogenic anti-inflammatory drugs and as base in polyelectrolyte complex systems, to prepare solid release systems as sponges was investigated. The preparation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2c649f43618a1efb1f78a96d6456735
https://doi.org/10.1016/j.molstruc.2011.05.001
https://doi.org/10.1016/j.molstruc.2011.05.001
Autor:
Manuela Stan, L. M. Giurgiu, Gh. Borodi, O. Raita, Dana Toloman, Al. Darabont, Adriana Florina Popa
Publikováno v:
Applied Magnetic Resonance. 40:261-266
Electron magnetic resonance (EMR) investigations of Sn1− x Fe x O2 (x = 0.07) powders annealed at different temperatures are reported. EMR spectra show the presence of both the isolated paramagnetic Fe3+ ions incorporated into the SnO2 lattice and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e459c4d94a987ef16d195c1cc142829
https://doi.org/10.1007/s00723-011-0211-y
https://doi.org/10.1007/s00723-011-0211-y