Publications

1. In-depth investigation of Mn2+ ions EPR spectra in ZnS single crystals with pure cubic structure.
S.V. Nistor and M. Stefan
J. Phys.: Condens. Matter 21, 145408 (7pp) (2009);

2. Study of the ground multiplet of Kramers rare earth ions in solid matrices by multifrequency EPR spectroscopy: Nd3+ in PbWO4 single-crystals.
F.F. Popescu, V. Bercu, J.N. Barascu, M. Martinelli, C.A. Massa, L.A Pardi, M. Stefan, S.V. Nistor, M. Nikl and P. Bohacek
J. Chem. Phys. 131, 034505 (7 pp) (2009);

3. Synthesis and characterization of Mn2+ doped ZnS nanocrystals self-assembled in a tight mesoporous structure.
S. V. Nistor, L. C. Nistor, M. Stefan, C. D. Mateescu, R. Birjega, N. Solovieva and M. Nikl
Superlattices Microstruct. 46, 306-311 (2009);

4. Incorporationand localisation of substitutional Mn2+ ions in cubic ZnS quantum dots.
S. V. Nistor, M. Stefan, L. C. Nistor, E. Goovaerts and G. Van Tendeloo
Phys. Rev. B 81(3), 035336 (6 pp) (2010);

5. Study of the Kramers rare earth ions ground multiplet with a large orbital contribution by multifrequency EPR spectroscopy: Ce3+ in PbWO4 scintillator.
F. F. Popescu, V. Bercu, J. N. Barascu, M. Martinelli, C. A. Massa, L. A. Pardi, M. Stefan, S. V. Nistor, M. Nikl
Opt. Mat. 32, 570-75 (2010);

6. Specificity of defects induced in silicon by RF-plasma hydrogenation.
C. Ghica, L.C. Nistor, M. Stefan, D. Ghica, B. Mironov, S. Vizireanu, A. Moldovan and M. Dinescu
Appl. Phys. A-Mater. Sci. Process. 98, 777- 85 (2010);

7. Improving the cubic ZnS  nanocrystals quality by self-assembling into a mezoporous structure.
S. V. Nistor, L. Nistor, M. Stefan, D. Ghica, C. D. Mateescu and R. Birjega
Rom. Rep. Phys. 62(2), 319-28 (2010);

8. Multifrequency characterization of paramagnetic point defects in semiconducting cubic BN crystals.
S. V. Nistor, M. Stefan, D. Ghica and E. Goovaerts
Appl. Magn. Reson. 39(1-2), 87-101 (2010);

9. Lattice assisted incorporation of Mn2+ ions in cubic II-VI semiconductor quantum dots.
S. V. Nistor, M. Stefan,  L. C. Nistor, D. Ghica, C. D. Mateescu and J. N. Barascu
IOP Conference Series: Materials Science & Engineering 15 (1), 012024 (2010); DOI:10.1088/1757-899X/15/1/012024

10. Localization of Mn2+ ions in mesoporous ZnS
S.V. Nistor, M. Stefan, L.C. Nistor, C.D. Mateescu and R. Birjega
J. Nanosci. Nanotechnol. 10, 6200-6205 (2010);

11. Substitutional and surface Mn2+ centers in small cubic ZnS:Mn nanocrystals. A correlated EPR and photoluminescence study. 
M. Stefan, S. V. Nistor, C. D. Mateescu, D. Ghica, M. Nikl and R. Kucerkova
Phys. Rev. B 83, 045301 (2011); DOI: 10.1103/PhysRevB.83.045301

12. Accurate determination of the spin Hamiltonian parameters for Mn2+ ions in cubic ZnS nanocrystals by multifrequency EPR spectra analysis. 
M. Stefan, S. V. Nistor and J.N. Barascu
J. Magn. Reson. 210, 200-09 (2011); DOI:10.1016/j.jmr.2011.03.004

13. Structural phase transformations in annealed cubic ZnS nanocrystals. 
D. Ghica, S. V. Nistor, L. C. Nistor, M. Stefan and C. D. Mateescu
J. Nanopart. Res. 13(9) 4325-4335 (2011); DOI: 10.1007/s11051-011-0379-y

14. Crystallization of Disordered Nanosized ZnO Formed by Thermal Decomposition of Nanocrystalline Hydrozincite
S. V. Nistor, L. C. Nistor, M. Stefan, D. Ghica, Gh. Aldica and J. N. Barascu
Cryst. Growth Des. 11 (11), 5030–5038 (2011); DOI: 10.1021/cg2009286

15. Local Structure at Mn2+ Ions in Vacuum Annealed Small Cubic ZnS Nanocrystals Self-Assembled Into a Mesoporous Structure . 
S. V. Nistor, D. Ghica, L. C. Nistor, M. Stefan and C. D. Mateescu
J. Nanosci. Nanotechnol. 11 9296-9303 (2011);

16. Preparation and properties of mesoporous cubic ZnS doped with Mn2+ activating ions
S. V. Nistor, M. Stefan, L. C. Nistor, D. Ghica, C. D. Mateescu and N. J. Barascu
"Modern Trends in Nanoscience", Eds. M. Balasoiu and G. M. Arzumarian, Ed. Acad. Romane 2013, pp 143-155; ISBN 978-973-27-2230-5.

17. Magnetic defects in crystalline Zn(OH)2 and nanocrystalline ZnO resulting from its thermal decomposition . 
S. V. Nistor, D. Ghica, M. Stefan, I. Vlaicu, J.N. Barascu and C.Bartha
Journal of Alloys and Compounds, 548, 222–227 (2013)

18. Correlation of lattice disorder with crystallite size and the growth kinetics of Mn2+ doped ZnO nanocrystals probed by EPR.
M. Stefan, S. V. Nistor and D. Ghica
Cryst. Growth & Design (ACS) 13, 1350-1359 (2013)

19. In-situ TEM investigation of the electron beam induced decomposition of crystalline hydrozincite into nanostructured zinc oxide
L. C. Nistor, S. V. Nistor and D. Ghica
Rom. Rept. Phys. 65 (1) 186-92 (2013)

20. Nanosize induced effects in luminescent ZnS: Mn2+ quantum dots.
S. V. Nistor, M. Stefan, D. Ghica and L. C. Nistor
Radiation Measurements, 56, 40-43 (2013),DOI: 10.1016/j.radmeas.2013.01.046

21. High thermal stability of the off-center paramagnetic Fe3+ ions in chlorinated SrCl2:Fe2+ crystals.
D. Ghica and S. V. Nistor
Rom. Repts. Phys. 65, 825-831 (2013)

22. Paramagnetic point defects in pure and 13C and 17O implanted silicon for high energy particle detectors.
S. V. Nistor, D. Ghica, I. Pintilie and E. Manaila
Rom. Repts. Phys. 65, 812-819 (2013)

23. Sequential thermal decomposition of the shell of cubic ZnS/Zn(OH)2 core-shell quantum dots observed with Mn2+ probing ions.
S. V. Nistor, D. Ghica, M. Stefan, L. C. Nistor
J. Phys. Chem. C (ACS), 117(42),22028 (2013), DOI: 10.1021/jp4063093

24. Co environment and magnetic defects in anatase CoxTi1-xO2 nanopowders
M.N. Grecu, D. Macovei, D. Ghica, C. Logofatu, S. Valsan, N.G. Apostol, G.A. Lungu, R.F. Negrea, R.R. Piticescu
Appl. Phys. Lett. 102, 161909 (5pp) (2013)

25. Evaluation of the Segregation of Paramagnetic Impurities at Grain Boundaries in Nanostructured ZnO Films
D. Ghica, M. Stefan, C. Ghica and G. E. Stan
ACS Applied Materials & Interfaces 6 (16) 14231-14238 (2014); DOI: 10.1021/am5035329

26. Pulse annealing electron paramagnetic resonance with probing transition ions. Application to thermal formation and growth of nanoZnO
S. V. Nistor, M. Stefan and D. Ghica
Journal of Thermal Analysis and Calorimetry 118 (2) 1021-1031 (2014); DOI: 10.1007/s10973-014-3743-1

27. ZnS and ZnO semiconductor nanoparticle doped with Mn2+ ions. Size effects investigated by EPR spectroscopy.
M. Stefan, S. V. Nistor and D. Ghica
“Size effects in nanostructures” eds. V. Kuncser and L. Miu, Springer Series in Materials Science, vol. 205, part. 1, ISBN 978-3-662-44478-8, Springer Verlag, Berlin, Heidelberg, 2014, pp 3-27; DOI: 10.1007/978-3-662-44479-5.1.

28. Revealing the Cu2+ ions localization at low symmetry Bi sites in photorefractive Bi12GeO20 crystals co-doped with Cu and V by high frequency EPR.
S. V. Nistor, M. Stefan, E. Goovaerts, F. Ramaz and B. Briat
J. Magn. Reson. 259, 87–94 (2015) DOI: 10.1016/j.jmr.2015.07.009

29. Doping ultrasmall cubic ZnS nanocrystals with Mn2+ ions over a broad nominal concentration range.
S. V. Nistor, M. Stefan, L. C. Nistor, D. Ghica, I. D. Vlaicu and A. C. Joita
J. Phys. Chem. C, 119 (41), pp 23781–23789 (2015) DOI: 10.1021/acs.jpcc.5b08113

30. Distribution and interaction of Mn2+ ions incorporated in cubic ZnS quantum dots over a broad concentration range.
S. V. Nistor, M. Stefan, L. C. Nistor, D. Ghica and I. D. Vlaicu
J. Alloys and Comp. 662, 193-199 (2016); DOI:10.1016/j.jallcom.2015.11.203

31. Aggregates of Mn2+ ions in mesoporous self-assembled cubic ZnS:Mn quantum dots: composition, localization, structure, and magnetic properties
S. V. Nistor, M. Stefan, L. C. Nistor, V. Kuncser, D. Ghica and .I. D. Vlaicu
J. Phys. Chem. C 120 (26), 14454-14466 (2016), DOI: 10.1021/acs.jpcc.6b04866

32. Zinc oxide thin films for radiation hardened devices by materials engineering
R. Plugaru, I. Mihalache, R. Gavrila, A.I. Danciu, G. Boldeiu, O.T. Nedelcu, N. Plugaru, V.A. Maraloiu, D. Ghica, M. Stefan, S.V. Nistor
In: Nanomaterials, Nanoparticles, Nanodevices, Eds: M. Zaharescu, H. Chiriac, D. Dascalu, 2016, Ed. Academiei Romane, Bucuresti, Romania, ISBN 978-973-27-2643-3

33. Ferritin surplus in mouse spleen 14 months after intravenous injection of iron oxide nanoparticles at clinical dose
A. Tamion, M. Hillenkamp, A. Hillion, V. A. Maraloiu, I. D. Vlaicu, M. Stefan, D. Ghica, H. Rositi, F. Chauveau, M.-G. Blanchin, M. Wiart, V. Dupuis
Nano Research 9 (8), 2398-2410 (2016), DOI: 10.1007/s12274-016-1126-6

34. On the agent role of Mn2+ in redirecting the synthesis of Zn(OH)2 towards nano-ZnO with variable morphology
D. Ghica, I. D. Vlaicu, M. Stefan, L. C. Nistor, S. V. Nistor
RSC Advances, 2016, 6, 106732 – 106741, DOI: 10.1039/C6RA23065B

35. Mn2+ ions distribution in doped sol–gel deposited ZnO films
M. Stefan, D. Ghica, S. V. Nistor, A. V. Maraloiu, R. Plugaru
Applied Surface Science 396, 1880-1889 (2017), DOI:10.1016/j.apsusc.2016.02.167

36. Origin and chemical composition of the amorphous material from the intergrain pores of self-asembled cubic ZnS:Mn nanocrystals
M. Stefan, I. D. Vlaicu, L. C. Nistor, D. Ghica and S. V. Nistor
Appl. Surf. Sci. 426, 342-350 (2017); DOI.org/10.1016/j.apsusc.2017.07.172