HEAD: Dr. SERGIU V. NISTOR E-mail: snistor@infim.

NATIONAL INSTITUTE OF MATERIALS PHYSICS* ANNUAL REPORT 2006 

Laboratory of Microstructure of Defects in Solid Materials 

_____________________________________________________________________________ 

HEAD: Dr. SERGIU V. NISTOR 

E-mail: snistor@infim.ro 

Tel: (+4021) 493 01 95 

Fax: (+4021) 493 02 67 

TOTAL EMPLOYEES: 12 

RESEARCH TEAM: 10 

1. Dr. Sergiu V. NISTOR senior researcher I 

2. Dr. Valentin S. TEODORESCU senior researcher I 

3. Dr. Leona C. NISTOR senior researcher I 

4. Dr. Nicoleta M. GRECU senior researcher I 

5. Dr. Corneliu GHICA senior researcher II 

6. Dr. Mariana STEFAN senior researcher II 

7. Dr. Carmencita D. MATEESCU senior researcher III 

8. Dr. Daniela GHICA senior researcher III 

9. Phys. Adeluta TARPAN assistant researcher 

10. Phys. Adrian MARALOIU assistant researcher 

MAIN RESEARCH FIELD 

Investigation at atomic scale, by microstructural and spectroscopic (ESR and optical) methods, 

of native and specially/artificially produced defects in bulk and nanostructured solid materials. 

Synthesis of nanostructured materials. Investigations of materials properties using paramagnetic 

point defects as atomic probes, as well as of changes induced by defects in ordered and partially 

disordered solids. 

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PRINCIPAL RESEARCH DIRECTIONS 

1. Atomic structure and quantum properties of native and irradiation induced defects in 

insulating and wide band-gap insulating and semiconducting crystalline materials and 

nanostructures. Project leader: Dr. Sergiu V. NISTOR 

2. Local structure, defects and disorder in nanomaterials with luminescent and special 

magnetoresistive properties. Project leader: Dr. Maria N. GRECU 

3. Microstructure of oxide nanopowders, thin films and laser processed materials. Project 

leader: Dr. Valentin S. TEODORESCU 

4. Microstructure transformations and defects associated phenomena in advanced 

materials and nanostructures. Project leader: Dr. Leona C. NISTOR 

5. Synthesis of calcium carbonate with pre-established properties by unconventional 

methods. Project leader: Dr. Carmencita MATEESCU 

MATERIALS UNDER INVESTIGATION 

- Insulating, photosensitive, photorefractive and scintilating crystalline materials. 

- Laser deposited complex metal-ceramic thin films and nanostructures. 

- Ferro-ferrielectric and ferroelastic crystalline materials. 

- Advanced materials for microelectronics and optoelectronics (high-k materials, ZnO, PMN-PT, 

mesoporous, nanostructured ZnS, H plasma treated Si). 

- Wide band-gap semiconductors ( ZnS and boron nitride compounds). 

- Incommensurate systems intermediate between translationally periodic ideal crystals and 

amorphous systems. 

- Sol-gel oxides nanoparticles and thin films (TiO2, SiO2, HfO2). 

- Organic semiconductors and molecular magnetic materials. 

- Nanocrystallites ( Fe2O3, Fe3O4, TiO2, Al2O3, MoO3, CuS, CdS etc) 

- Nanodimensional magnetic materials (nanowires, multilayers, granular magnetic materials, 

diluted magnetic semiconductors, patterned magnetic films) and nanocomposites. 

MAIN RESULTS REPORTED IN YEAR 2006 

1.Microstructure and quantum properties of intrinsic and irradiation point defects in wide bandgap 

crystalline materials. 

The materials properties of the wide band-gap insulators and semiconductors can be 

dramatically influenced by the presence of different point defects with specific atomic properties. 

By producing and investigating the atomic properties of new point defects in such crystalline 

materials and their influence on the physical, macroscopic properties (electrical, optical, 

magnetic) one can model the corresponding materials properties for a large array of applications. 

The single-mode vibration as the dominant mechanism in spin-lattice interaction of the Gd 3+ 

impurity ions in scintillating PbWO4 single crystals has been identified from ESR parameters vs. 

T investigation. (J. Phys.: Condens. Matter 18, 719-728 (2006)) 

Investigation into the production and properties of point defects induced by radiolysis and 

subsequent thermochemical treatments in chlorinated SrCl2:Fe single crystals has resulted in new 

Fe + -type of paramagnetic centers, which are thermally stable at high (above 300K) temperatures. 

As shown in the next figure , their mechanism of formation and atomic structure has been 

elucidated by multifrequency ESR investigations, as being due to the presence of interaction of 

chlorine interstitials and alkali cations, present as native impurities in the SrCl2 latice host. Due 

to their high thermal stability such centers can be used for practical applications. 

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The formation properties of the radiolytic Fe + -type point defects in chlorinated SrCl2:Fe 

crystals and the proposed interstitials assisted mechanism - Phys. Rev. B73 (17) 174103-1 to 9 

(2006) 

2.Local structure, defects and disorder in nanomaterials with luminescent and special 

magnetoresistive properties 

Local structure, spin dynamics and core-shell effects in granular, nanostructured and nanowires 

lanthanum magnetoresistive manganites have been evidenced by EPR. The temperature 

dependence of the EPR linewidth vs. δH1/2 for La2/3Ca1/3MnO3-δ samples of different grain size, 

as fitted with the small polaron model is presented in the figure below. 

δ H 1/2 

80 

70 

60 

50 

40 

30 

20 

10 

D = 90 nm 

D = 150 nm 

Ceramic sample 

200 250 300 350 400 450 500 550 

T ( K ) 

The table presents the exchange coupling integral J between the Mn ions and the polaron 

activation energy Ea values as function of the grain size, in the paramagnetic regime. The size 

effects observed: increased influence of magnetically disordered surface, structural changes upon 

annealing, and core/shell effect (J. Phys. Chem. Solids 67, 624-627 (2006); J. Eur. Ceramic Soc. 

26, 3005-3010 (2006); J. Optoelectronics & Adv. Mat. 2, 467-470 (2006)). 

Microstructure of different crystalline phases in organic semiconductor (tris-(8-hydroxyquinoline)aluminum), 

Alq3, obtained by sublimation have been observed and characterized by EPR 

and TEM techniques (Materials Sci. Forum, 514-516,133-137 (2006)). 

130 

La2/3Ca1/3MnO3-δ 

Ceramic 

D = 150 nm 

Nanosized 

D = 90 nm 

J Ea 

(K) (meV) 

116 120 

87 

39 

104 

83



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3.Microstructure of oxide, carbide and nitride nanopowders, thin films and laser processed 

materials. 

Crystallographic relations in advanced tribological multilayers produced by pulsed laser 

deposition have been determined from TEM investigations (Surface and Coatings Techn. 200, 

6190-6195 (2006)). 

4.Microstructure transformations and defect associated phenomena in advanced materials. 

Qualitative and quantitative characterization of the {111} planar defects in H-plasma treated Si 

wafers has been performed by high resolution transmission electron microscopy (HRTEM). The 

quantitative image processing by the geometrical phase method of the HRTEM image of an 

edge-on {111} defect reveals the intrinsic character of the defect and provides quantitative 

information about the lattice strain around it. 

Y 

X 

(a) HRTEM image of a {111} planar defect induced in Si by RF hydrogen plasma; (b) map 

of the εyy component (∂uy/∂y) of the symmetrical strain matrix εij; (c) averaged line 

profile of the strain component εyy across the defect. 

The derived quantitative information allowed us to propose a structural model for the defect, 

which in turn has been verified by HRTEM image simulations (Philosophical Magazine 86, 

5137-5151 (2006)). 

131 

c 

b



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PUBLICATIONS - PAPERS PUBLISHED IN 2006 

1.C.Ghica, L.C.Nistor, H.Bender, O.Richard, G.VanTendeloo, A.Ulyashin, "Characterization 

of {111} planar defects induced in silicon by hydrogen plasma treatments", Phil. Mag., 86, 5137- 

5151, 2006) 

2.D.Ghica, S.V.Nistor, E.Goovaerts, D.Schoemaker, H.Vrielinck, F.Callens, "Electron trapping 

centers and interstitials in chlorinated SrCl2:Fe single crystals", Phys.Rev.B 73 (17) 174103-1 

to 9, 2006 

3.M.L.Ciurea, V.S.Teodorescu, V.Iancu, I.Baberg, "Electronic transport in Si-SiO2 

nanocomposite films", Chemical Physics Letters 423, 225-228, 2006 

4.A.Goldenblum, I.Pintilie, M.Buda, A.Popa, M.Lisca, T.Botila, V.S.Teodorescu, A.Dimoulas, 

G.Vellianitis, "Electrical properties of as-grown molecular beam epitaxy high-k gate dielectrics 

deposited on silicon", Journal of Applied Physics, 99 (6), 064105, 2006 

5.O.Pana, L.M.Giurgiu, Al.Darabont, V.Iancu, M.Ciurea, M.N.Grecu, A.Bot, "Core-shell effects 

in granular perovskite manganites", J.Phys.Chem.Solids 67, 624-627, 2006 

6.C.Ghica, C.Ristoscu, G.Socol, D.Brodoceanu, L.C.Nistor, I.N.Mihailescu, A.Klini, C.Fotakis, 

"Growth and characterization of β-SiC films obtained by fs laser ablation", Appl.Surf.Sci, 252, 

4672-4677, 2006 

7.C.Ristoscu, G.Socol, C.Ghica, I.N.Mihailescu, D.Gray, A.Klini, A.Manousaki, D.Anglos, 

C.Fotakis, "Femtosecond pulse shaping for phase and morphology control in PLD: Synthesis of 

cubic SiC", Appl.Surf.Sci., 252, 4857-4862, 2006 

8.B.Canut, M.G.Blanchin, S.Ramos-Canut, V.Teodorescu, M.Toulemonde, "Incorporation of 

sol-gel SnO2:Sb into nanoporous SiO2", Nuclear Instruments and Methods in Physics Research 

B 245, 327-331, 2006 

9.L.Major, J.Morgiel, B.Major, J.M.Lackner, W.Waldhauser, R.Ebner, L.Nistor, 

G.VanTendeloo, "Crystallographic aspects related to advanced tribological multilayers of 

Cr/CrN and Ti/TiN types produced by pulsed laser deposition (PLD)", Surface & Coatings 

Technology, 200 (22-23), 6190-6195, 2006 

10.S.V.Nistor, M.Stefan, E.Goovaerts, M.Nikl, P.Bohacek, "EPR properties of Gd 3+ ions in 

PbWO4 scintillator crystals", J.Phys.: Condens. Matter 18, 719-728, 2006 

11.R.Cossio, F.Fizzotti, E.Vittone, A.LoGiudice, C.Manfredotti, S.Nistor, "Low temperature CL 

investigation of BN1 vibronic structure in cBN", Diam. & Rel. Mater. 15, 1166-68, 2006 

12.S.V.Nistor, E.Goovaerts, "Paramagnetic defects in amber colored superhard c-BN 

crystalline powders", High Pressure Research 26 (2), 111-117, 2006 

13.P.terHeerdt, M.Stefan, E.Goovaerts, A.Caneschi, A.Cornia, "Single-ion and molecular 

contributions to the zero-field splitting in an iron-(III)-oxo dimer studied by single crystal Wband 

EPR", J.Magn.Res. 176, 21-29, 2006 

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14. J.Tardy, M.Erouel, A.L.Deman, A.Gagnaire, V.S.Teodorescu, M.G.Blanchin, B.Canut, 

A.Barau, M.Zaharescu, "Organic thin film transistors with HfO2 high-k gate dielectric grown by 

anodic oxidation or deposited by sol–gel" , Microelectronics and Reliability, in press, available 

online 5 May2006 

15.D.C.Culita, L.Patron, V.S.Teodorescu, I.Balint, "Synthesis and characterization of spinelic 

ferrites obtained from coordination compounds as precursors", J.of Alloys and Compounds, in 

press, available online from 7 July 2006 

16.M.N.Grecu, C.Ghica, A.Mirea, V.V.Grecu, M.Schwoerer, "EPR and TEM characterizationa 

of electroluminescent Alq " , Materials Science Forum, 514-516, 133-137, 2006 

17.G.Mihailescu, Al.Darabont, O.Raita, D.Toloman, C.V.L.Pop, E.Indrea, L.Olenic, S.Idziak, 

S.K.Hoffmann, M.N.Grecu, L.M.Giurgiu, "Synthesis, microstructure and electron spin 

resonance of La2/3Ca1/3MnO3 nanowires", J.Optoelectron.Adv.Mater. 2, 467-470, 2006 

18.A.Goldenblum, A.Belu-Marian, V.S.Teodorescu,"Optical properties of ZnO nanocrystallites 

embedded in gold-oxide matrix", J.Optoelectron.Adv.Mater., 8, 2129-2131, 2006 

19.C.M.Simonescu, L.Patron, V.S.Teodorescu, M.Brezeanu, C.Capatina, "A facile chemical 

route to copper sulfide CuS nanocrystallites – pH effect of the morphology and the shape of 

them", J.Optoelectron.Adv.Mater. 8, 597-600, 2006 

20.I.M.Crisan, M.Raileanu, S.Preda, M.Zaharescu, A.M.Valean, J.Popovici, V.S.Teodorescu, 

V.Matejec, J.Mrazek, "Manganese doped sol-gel materials with catalitic properties", 

J.Optoelectron.Adv.Mater., 8, 815-819, 2006 

21.S.Tanasescu, C.Marinescu, F.Maxim, O.Raita, M.N.Grecu, L.M.Giurgiu, "Thermodynamic 

properties and spin dynamics of some micro and nanostructured magnetoresistive lamthanum 

manganites", J.Eur.Ceramic Soc., 26, 3005-3010, 2006 

22.M.Mocioi, A.M.Albu, C.Mateescu, E.Rusen, B.Marculescu, L.Mutihac, "New polymeric 

structures designed for the removal of Cu(II) ions from aqueous solutions", 

J.Appl.Polym.Science, 103, 1397-1405, 2007 

23.J.Morgiel, L.Major, B.Major, J.M.Lackner, L.C.Nistor, "Advances and problems with TEM 

characterization of Cr/CrN multilayer coatings", J.of Microscopy – Oxford, 223 (3), 237-239, 

2006 

24.C.Mateescu, M.Mocioi, C.Sarbu, R.Isopescu, I.Chilibon, F.Branzoi, "Calcium carbonate 

precipitation in ultrasonic field", BIWIC 2006 13-th International Workshop on Industrial 

Crystallization, pp. 193-200, 2006 

25.M.Mocioi, C.Mateescu, R.Isopescu, F.Branzoi, E.Coman, O.Florea, "Semi-batch 

precipitation of calcium carbonate in the presence of organic additives", BIWIC 2006 13-th 

International Workshop on Industrial Crystallization, pp. 201-208, 2006 

26.S.S.Udubasa, S.Constantinescu, N.Popescu Pogrion, M.N.Grecu, F.Tolea G.Udubasa, I.V. 

Popescu, "ME, XRD , RNG and ESR investigations on some sulphides from Costesti, Valea lui 

Stan and Jidoştiţa gold ores (Southern Carpathians)", Rom.J.Mineral.Depos. 82, 228-234, 2006 

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27.R.Minea, M.Brasoveanu, M.N.Grecu, M.R.Nemtanu "Preliminary studies on irradiated 

Spirulina", Rom.Journ.Phys. 51, 141-145, 2006 

28.M.Brasoveanu, M.N.Grecu, M.R.Nemtanu, "Electron paramagnetic resonance study on 

irradiated green cofee", Rom.Journ.Phys. 51, 147-150, 2006 

29.C.Mateescu, M.Mocioi, C.Sarbu, F.Branzoi, I.Chilibon, "Combined influence of organic 

additives and ultrasounds on CaCO3 morphology", Cercetarea de Excelenta-Premiza Favorabila 

pentru Dezvoltarea Spatiului Romanesc de Cercetare, Brasov, vol. I, L1-15, 2006 

30.I.Chilibon, M.Mocioi, C.Mateescu, "Ultrasound piezoceramic transducer for 

sonochemistry", Cercetarea de Excelenta-Premiza Favorabila pentru Dezvoltarea Spatiului 

Romanesc de Cercetare, Brasov, vol. II, L4-36, 2006 

31.S.S.Udubasa, S.Constantinescu, N.Popescu-Pogrion, M.N.Grecu, I.V.Popescu, G.Udubasa, 

"Examples of complex investigations on gold bearing sulphides from shear zone related ores", 

Anuarul Institutului Geologic al Romaniei 74 247-250, 2006 

LIST OF PAPERS ACCEPTED FOR PUBLICATION IN 2007 

1.D.Ghica, S.V.Nistor, E.Goovaerts, "Localization and movement of native interstitials in 

chlorinated SrCl2:Fe crystals", Phys.Stat.Sol. a204(3) (2007) DOI 10.1002/pssa.200673878 

2.C.Ghica, L.C.Nistor, H.Bender, O.Richard, G.VanTendeloo, A.Ulyashin, "TEM 

characterization of extended defects induced in Si wafers by H plasma treatment", Journal of 

Physics D: Applied Physics, 2007 

3.L.C.Nistor, C.Ghica, G.VanTendeloo, "Mesoscopic ordering in the 0.9PMN-0.1PT relaxor 

ferroelectric: a HRTEM study", Phys.Stat.Sol (a), 2007 

4.F.Iacomi, D.Mardare, M.N.Grecu, D.Macovei, I.V.Simiti, "XPS and EPR studies on iron 

repartition in Fe-doped TIO2 thin films", Mat. Sci & Techn., 2007 

5.S.Vizireanu, B.Mitu, G.Dinescu, L.C.Nistor, C.Ghica, A.Maraloiu, M.Stancu, G.Ruxandra, 

"Verieties of nanostructured carbon grown by expanding radiofrequency plasma beam", J. 

Optoelectron.Adv.Mater. , 2007 

PARTICIPATIONS AT INTERNATIONAL SCIENTIFIC MEETINGS IN 2006. LIST 

OF PAPERS/COMMUNICATIONS PRESENTED 

1.S.S.Udubasa, S.Constantinescu, N.Popescu-Pogrion, M.N.Grecu, Gh.Udubasa, "Mössbauer, 

XRD, TEM/SAED and ESR investigations on some sulphides from Costesti, Valea lui Stan and 

Jidoştiţa gold ores (Southern Carpathians)", 3nd Mineral Sciences in the Carpathians 

International Conference, Miskole, Hungary, 9-10 March 2006 (poster) 

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2.C.Ghica, "Qualitative and quantitative HRTEM characterization of extended defects induced 

in silicon by H-plasma treatment", 2nd Croatian Microscopy Congress with International 

Participation, May 18-21, 2006, Topusko, Croatia (invitated lecture) 

3.M.Stefan, S.V.Nistor, E.Goovaerts, M.Nikl, P.Bohacek, "EPR investigation of Gd 3+ doping 

impurity in PbWO4 scintillating crystals", 14th Meeting of the Benelux EPR Group, Leuven, 

Belgium, 19 May 2006 (poster) 

4.S.V.Nistor, D.Ghica, M.Stefan, E.Goovaerts, A.Bouwen, "Multifrequency EPR investigation 

of point defects in nominally pure, amber colored cubic boron nitride crystals", 14th Meeting of 

the Benelux EPR Group, Leuven, Belgium, 19 May 2006 (poster) 

5.D.Ghica, S.V.Nistor, H.Vrielinck, F.Callens, E.Goovaerts, D.Schoemaker, "Electron and 

chlorine interstitials trapping at Fe2+ impurity ions in chlorinated SrCl2 crystals", 14th 

Meeting of the Benelux EPR Group, Leuven, Belgium, 19 May 2006, (oral presentation) 

6.M.G.Blanchin, B.Canut, K.Kaja, A.Barău, M.Zaharescu, V.S.Teodorescu, "Crystallization 

features of HfO2 sol-gel thin films", EMRS Nice, France, May 29 - June 2, 2006 (oral 

presentation) 

7.V.S.Teodorescu , F.Goldemblum, M.G.Blanchin, "Cubic structure of ZnO:CuO thin films 

obtained by RF sputtering", EMRS Nice, France, May 29- June 2, 2006 (poster) 

8.C.Ghica, L.C.Nistor, H.Bender, O.Richard, G.VanTendeloo, A.Ulyashin, "TEM 

characterization of extended defects induced in Si wafers by H plasma treatment", E-MRS, May 

29 – June 2, 2006, Nice, France (poster) 

9.D.Stanoi, C.Ghica, G.Socol, E.Axente, S.Grigorescu, C.Ristoscu, S.Georgescu, C.Stoicescu, 

I.Mihailescu, "Nanocristalline Er:YAG thin film prepared by pulsed laser deposition", E-MRS, 

May 29 – June 2, 2006, Nice, France (poster) 

10.G.Epurescu, G.Dinescu, A.Moldovan, M.Dinescu, F.DiPietrantonio, E.Verona, P.Verardi, 

L.C.Nistor, C.Ghica, "Undoped and nitrogen and magnezium doped ZnO thin films deposited 

by pulsed laser deposition", E-MRS, May 29 – June 2, 2006, Nice, France (poster) 

11.F.Iacomi, D.Mardare, M.N.Grecu, D.Macovei, I.V.Simiti, "XPS and EPR studies on iron 

repartition in Fe-doped TIO2 thin films", E-MRS, May 29 – June 2, 2006, Nice, France (poster) 

12.O.Raita, D.Toloman, G.Mihailescu, Al.Darabont, C.V.L.Pop, L.Olenic, A.Popa, M.N.Grecu, 

S.Idziak, S.K.Hoffmann, L.M.Giurgiu, "La2/3Ca1/3MnO3 nanowires investigated by EPR", 

NANOMAT 2006, International Workshop, Antalya, Turkey, June 21-23, 2006 (poster) 

13.S.V.Nistor, M.Stefan, E.Goovaerts, M.Nikl, P.Bohacek, "EPR investigation of Gd 3+ doping 

impurity in PbWO4 scintillating crystals", 4th International Symposium on Laser, Scintillator 

and Non Linear Optical Materials ISLNOM-4, June 26-30, 2006, Prague, Czech Republic 

(poster) 

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14.S.V.Nistor, "Investigating local interactions at doping impurities in wide band gap 

scintillation crystals by EPR spectroscopy', 4th International Symposium on Laser, Scintillator 

and Non Linear Optical Materials ISLNOM-4, June 26-30, 2006, Prague, Czech Republic 

(keynote lecture) 

15.S.Vizireanu, B.Mitu, G.Dinescu, L.C.Nistor, C.Ghica, "PECVD of nanostructured carbon in 

a remote RF discharge", Cargèse International School „Nano Sciences Tech” July 3 -15, 2006 

Cargèse, Corsica, France (poster) 

16.S.V.Nistor, M.Stefan, E.Goovaerts, F.F.Popescu, V.Bercu, M.Martinelli, M.Nikl, 

P.Bohacek, "ESR investigation of S-type impurity defects in PbWO4 scintillating crystals", 10th 

Europhysical Conference on Defects in Insulating Materials EURODIM-2006, July 10 -14, 

2006, Milano, Italy (poster) 

17.S.V.Nistor, D.Ghica, M.Stefan, E.Goovaerts, T.Taniguchi, “Photosensitive defects in 

nominally pure and doped cubic boron nitride crystals”, 10th Europhysical Conference on 

Defects in Insulating Materials EURODIM-2006, July 10 -14, 2006, Milano, Italy (keynote 

lecture) 

18.D.Ghica, S.V.Nistor, E.Goovaerts, "Localization and movement of native interstitials in 

chlorinated SrCl2:Fe crystals", 10th Europhysical Conference on Defects in Insulating Materials 

EURODIM-2006, July 10 -14, 2006, Milano, Italy (oral presentation) 

19.M.N.Grecu, A.Tarpan, V.V.Grecu, "New radiation induced defects in tris-(8hydroxyquinoline)aluminum 

(Alq3)", 10th Europhysical Conference on Defects in Insulating 

Materials (EURODIM 2006), Milano, Italy, July 10-14, 2006 (poster) 

20.V.V.Grecu, M.N.Grecu, S.Constantinescu, S.Georgescu, H.Vrielinck, F.Callens, "EPR 

evidence of static disorder in langasite-type single crystals", 10th Europhysical Conference on 

Defects in Insulating Materials (EURODIM 2006), Milano, Italy, July 10-14, 2006 (oral 

presentation) 

21.L.C.Nistor, C.Ghica, G.VanTendeloo, "Mesoscopic ordering in the 0.9PMN-0.1PT relaxor 

ferroelectric: a HRTEM study", 10-th Europhysical Conference on Defects in Insulating 

Materilas EURODIM-2006, July 10-14, 2006, Milano, Italy (poster) 

22.A.Popa, D.Toloman, M.N.Grecu, I.Craciunescu, A.Nan, X.Filip, O.Raita, R.Turcu, 

L.M.Giurgiu, "Magnetic resonance investigations of core-shell Fe3O4/PPy nanocomposites", 

EUROMAR 2006, Magnetic Resonance for the Future, York, England, 16-21 July, 2006 (oral 

presentation) 

23.D.Toloman, M.N.Grecu, I.Craciunescu, X.Filip, I.Ardelea, O.Raita, R.Turcu, L.M.Giurgiu, 

"Temperature dependence of electron magnetic resonance and magnetization in PPY α-Fe2O3 

nanocomposites", EUROMAR 2006, Magnetic Resonance for the Future, York, England, 16-21 

July, 2006 (poster) 

24.C.Mateescu, M.Mocioi, C.Sarbu, F.Branzoi, I.Chilibon, "Morphological variations displayed 

by precipitated calcium carbonate under the influence of ultrasonic field" (poster), 6-th 

International Conference of the Balkan Physical Union, August 22-26, 2006, Istanbul, Turkey. 

(poster) 

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25.I.M.Crisan, A.Braileanu, M.Raileanu, D.Crisan, V.S.Teodorescu, R.Birjega, V.E.Marinescu, 

J.Madarasz, G.Pokol, "TiO2- based nanopowders obtained from different Ti- alkoxides", 9th 

European Symposium on Thermal Analysis and calorimetry ESTAC 9, 27-31 august 2006, 

Krakow, Poland (poster) 

26.S.V.Nistor, D.Ghica, L.C.Nistor, E.Goovaerts, T.Taniguchi, "Irradiation induced point 

defects in undoped and doped c-BN single crystals", 17th European Conference on Diamond, 

Diamond-Like Materials, Carbon Nanotubes and Nitrides DIAMOND-2006, September 3 - 8, 

2006, Estoril, Portugal (poster) 

27.S.V.Nistor, D.Ghica, M.Stefan, E.Goovaerts, A.Bouwen, "W(95 GHz) - band ESR 

investigation of point defects in amber colored, nominally pure c-BN single crystals", 17th 

European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes and Nitrides 

DIAMOND-2006, September 3 - 8, 2006, Estoril, Portugal (poster) 

28.D.Ghica, S.V.Nistor, H.Vrielinck, F.Callens, E.Goovaerts, D.Schoemaker, "Multifrequency 

EPR and ENDOR investigations of electron trapped centers in chlorinated SrCl2:Fe crystals", 

6th European Federation of EPR Groups Meeting, September 5 - 8, 2006, Madrid, Spain (poster) 

29.M.G.Blanchin, B.Canut, K.Kaja, V.S.Teodorescu, A.Barău, M.Zaharescu, "TEM study of 

HfO2 monolayer sol-gel thin films", IMC16 – 16 th International Microscopy Congress, Sapporo, 

Japan, 3-8 september 2006 (oral presentation) 

30.V.S.Teodorescu, L.Diamandescu, D.Tarabasan-Mihaila, M.G.Blanchin, "TEM study of 

unusual shape of hydrothermal synthesized hematite", IMC16 – 16 th International Microscopy 

Congress , Sapporo, Japan, 3-8 september 2006 (poster) 

31.R.Olar, M.N.Grecu, M.Badea, D.Marinescu, "Synthesis and EPR characterization on new 

Cu(II) complexes with superoxide dismutase like activity", 6 th European Federation of EPR 

Groups Meeting and Cost Physics - Action P15, 5-8 September 2006, Madrid, Spain. (poster) 

32.A.Mirea, M.N.Grecu, V.V.Grecu, M.Schwoerer, "Jahn-Teller effect on Cu-terpyridine 

chelates", 6 th European Federation of EPR Groups Meeting and Cost Physics - Action P15, 5-8 

September 2006, Madrid, Spain. (poster) 

33.C.Mateescu, M.Mocioi, C.Sarbu, R.Isopescu, I.Chilibon, F.Branzoi, "Calcium carbonate 

precipitation in ultrasonic field", BIWIC 2006 13-th International Workshop on Industrial 

Crystallization, September 13-15, 2006, Delft, Nederlanden (poster) 

34.M.Mocioi, C.Mateescu, R.Isopescu, F.Branzoi, E.Coman, O.Florea, "Semi-batch 

precipitation of calcium carbonate in the presence of organic additives", BIWIC 2006 13-th 

International Workshop on Industrial Crystallization, September 13-15, 2006, Delft, 

Nederlanden (poster) 

35.C.M.Simonescu, V.S.Teodorescu, L.Patron, C.Capatina, "Nucleation and crystal growth 

mechanism of CuS nanocrystallites obtained from copper (II): thiosulphate system", 13th BIWIC 

International Workshop on Industrial Crystallization, September 13-15, 2006, Delft, 

Nederlanden (poster) 

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36.S.V.Nistor, "What do we know about the paramagnetic point defects in c-BN crystals?", 

Intern. specialized workshop"BN2006-Sinaia", "Synthesis and characterization of the boron 

nitride as an advanced semiconductor for extreme conditions" , 17-20 September 2006 , Sinaia, 

Romania (invited lecture) 

37.L.M.Giurgiu, M.N.Grecu, "Size and core-shall effects as seen by EPR in nanosized 

manganites", Fifth International Conference on Inorganic Materials, Ljubljana, Slovenia, 23-26 

September 2006 (poster) 

38.D.Toloman, M.N.Grecu, X.Filip, O.Raita, R.Turcu, L.M.Giurgiu, "Magnetic and ESR 

investigation of iron oxide/polypyrrole nanocomposites", Fifth International Conference on 

Inorganic Materials, 23-26 September 2006, Ljubljana, Slovenia. (poster) 

39.A.Popa, D.Toloman, M.N.Grecu, O.Raita, R.Turcu, L.M.Giurgiu, "Magnetic properties and 

ferromagnetic resonance Fe3O4/polypyrrole nanoparticles", Fifth International Conference on 

Inorganic Materials, 23-26 September 2006, Ljubljana, Slovenia. (poster) 

40.S.Vizireanu, B.Mitu, L.Nistor, C.Ghica, A.Malesovic, G.Dinescu, "2 and 3 D carbon 

nanostructures obtained by low pressure rf plasma jet", Plasma Summer School “Low 

Temperature Plasma Physics: Basic and Applications” 7-15 October 2006, Bad Honef, Germany 

(poster) 

41.S.Vizireanu, B.Mitu, L.Nistor, C.Ghica, A.Malesovic, G.Dinescu, "2 and 3 D carbon 

nanostructures obtained by low pressure rf plasma jet, 2006 Annual Meeting GDR-E: “Science 

and applications of nanotubes” 15-19 October 2006, Obernai, France. (poster) 

42.S.V.Nistor, D.Ghica, M.Stefan, E.Goovaerts, A.Bouwen, "Multifrequency ESR 

investigations of point defects in superhard, diamond-like cubic boron nitride crystalline 

powders", MRS 2006 Fall Meting, November 27-December 1, 2006 Boston, U.S.A. (oral 

presentation) 

PARTICIPATIONS AT NATIONAL SCIENTIFIC MEETINGS IN 2006. 

LIST OF PAPERS/COMMUNICATIONS PRESENTED 

1.V.V.Grecu, M.N.Grecu, "EPR study of Cr ions in langatate single crystals", Annual Scientific 

Conference, Faculty of Physics, University of Bucharest, May 26, 2006 (oral presentation) 

2.S.S.Udubasa, S.Constantinescu, N.Popescu-Pogrion, M.N.Grecu, I.V.Popescu, G.Udubasa, 

"Examples of complex investigations on gold bearing sulphides from shear zone related ores", 

The 100th Anniversary Symposium of the Geological Institute of Romania, June 19-20, 2006; 

Anuarul Institutului Geologic al Romaniei v. 74 (2006) 247-250 (oral presentation) 

3. I.M.Crisan, A.Braileanu, M.Raileanu, D.Crisan, V.S.Teodorescu, R.Birjega, V.E.Marinescu, 

J.Madarasz, G.Pokol, "The influence of the precursor on the sol-gel TiO2 based nanopowders 

synthesis", 12th Physics Chemistry Conference - ROMPHYSCHEM 12, Sept. 6-8, 2006, 

Bucharest, Romania (poster) 

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4.S.Vizireanu, B.Mitu, G.Dinescu, L.Nistor, C.Ghica, M.Stancu, G.Ruxandra, "Varieties of 

nanostructured carbon grown by expanding radiofrequency plasma beam", Romanian 

Conference on Advaced Materials, ROCAM 2006, September 11-14, 2006, Bucharest - 

Magurele, ROMANIA (oral presentation) 

5.C. Mateescu, M.Mocioi, C.Sarbu, F.Branzoi, I.Chilibon, "Combined influence of organic 

additives and ultrasounds on CaCO3 morphology", Cercetarea de Excelenta-Premiza Favorabila 

pentru Dezvoltarea Spatiului Romanesc de Cercetare, 22-24 oct., 2006, Brasov, Romania (oral 

presentation) 

6.I.Chilibon, M.Mocioi, C.Mateescu, "Ultrasound piezoceramic transducer for sonochemistry", 

Cercetarea de Excelenta-Premiza Favorabila pentru Dezvoltarea Spatiului Romanesc de 

Cercetare, 22-24 oct. , 2006, Brasov, Romania (oral presentation) 

FOREIGN RESEARCH LABORATORIES INVOLVED IN DIRECT SCIENTIFIC 

COOPERATION WITH LABORATORY MICROSTRUCTURE OF DEFECTS IN 

SOLID MATERIALS 

1. Laboratory EMAT, Department of Physics, University of Antwerp, Antwerp, Belgium. Head: 

Prof. G. Van Tendeloo. 

2. Laboratory of ECMP-Experimental Condensed Matter Physics, Dept. of Physics, University 

of Antwerp, Antwerp, Belgium. Head: Prof. Dr. E. Goovaerts 

3. Laboratory of Magnetic Resonance, Dept. of Physics, Univ. of Gent (RUG), Gent, Belgium. 

Head: Prof. Dr. F. Callens 

4. Laboratory of Experimental Physics II, University of Bayreuth, Bayreuth, Germany. Head 

Prof. Dr. M. Schwoerer 

5. University “Claude Bernard”, Laboratoire de Physique de la Matiere Condensee et 

Nanostructures ( LPMCN), Lyon, France. Project leader: Dr. M. G. Blanchin 

6. Universita degli Studi di Torino, Dipartimento di Fisica Sperimentale, Torino, Italy. Project 

leader: Prof. Dr. C. Manfredotti. 

7. Dept. of Physics, Faculty of Materials Engineering, Technical University of Czestochowa, 

Poland. Head: Prof. Dr. R. Hrabanski 

8. Department of Physics of Optical Crystals, Institute of Physics of the Academy of Sciences of 

the Czech Academy, Prague, Czech Republic. Head: Dr. M. Nikl. 

INTERNATIONAL COOPERATIVE SCIENTIFIC PROJECTS 

- "Advanced paramagnetic resonance methods in molecular biophysics" - COST P-15 

action (2005- 2009) Participation since 2006. COST P-15; National coordinator: dr. S. V. Nistor 

- "Cubic boron nitride as a new material for radiation detection and devices in extreme 

conditions", (2006-2008), Foreign partners: University of Torino, Experimental Physics 

Department, Torino, Italy. Romanian project co-promoter: Dr. S. V. Nistor. Project financed in 

the frame of the 15th protocol for science-technology co-operation agreement Romania-Italy 

from Dec. 5th, 2005. 

- “Designing new advanced, multifunctional materials with lattice defects”, (2005-2009), 

Foreign partner: University of Antwerpen, ECMP Laboartory, Antwerp, Belgium, Romanian 

project co-director: Dr. S. V. Nistor. Bilateral research project. 

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- “Nano-structured multifunctional oxide materials: the role of the local structure on their 

physical and chemical properties”, (2005-2009), Foreign partner: University of Antwerpen, 

EMAT Laboratory Antwerp, Belgium, Romanian project co-director: Dr. L.C. Nistor. Bilateral 

research project. 

- “Materials and thin films for optoelectronic applications” (2004-2006) Foreign partner: 

University “Claude Bernard”, LPMCN., Lyon, France, Romanian project co-director: Dr. V. S. 

Teodorescu. Bilateral research project. 

- “Growth, processing and characterization of ZnO nanostructures” (2005-2007). Foreign 

partner: Institute of Materials Physics and Chemistry of Strasbourg, Surface-Interface Group. 

Romanian project co-promoter: Dr. C. Ghica. Bilateral convention of cooperation and exchange. 

PRIZES - SCIENTIFIC RECOGNITION 

Dr. Daniela Ghica – Physica Status Solidi Young Researcher Award, bestowed for her 

contribution entitled “Localization and movement of native interstitials in chlorinated SrCl2:Fe 

crystals” awarded at the 10 th Europhysical Conference on Defects in Insulating Materials, 10-14 

July 2006, Milano, Italy 

CONFERENCES/WORKSHOPS/SCHOOLS ORGANIZED 

1. International specialized workshop "BN2006-Sinaia", "Synthesis and characterization of 

the boron nitride as an advanced semiconductor for extreme conditions" , Sinaia, 17-20 

September 2006. 

Organizers: S. Frunza , S. V. Nistor (workshop chairman), D. Ghica, L. C. Nistor, M. Stefan, 

C. Ghica and A. Maraloiu 

EDUCATIONAL ACTIVITIES: 

- Ph.D. Thesis successfully completed: 

1. Daniela Ghica " Magnetic Resonance of radiation products in chlorinated SrCl2 : Fe single 

crystals" . (PhD thesis defended and accepted on February 15th, 2006 with Suma Cum Laude – 

University of Bucharest) (PhD adviser: Dr. S. V. Nistor) 

- Postdoc stages: 

1. Dr. M. Stefan, University of Antwerpen, Department fo Physics, ECMP Laboartory, 

Antwerp, Belgium. 

2. Dr. C. Ghica, University of Antwerpen, Department fo Physics, EMAT Laboartory, 

Antwerp, Belgium. 

- PhD students: 

1. A. Tarpan, Department of Physics, University of Gent, Gent, Belgium. 

2. A. Maraloiu, University “Claude Bernard”, LPMCN., Lyon, France. 

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VISITORS FROM ABROAD (name, country) 

1. Prof. Dr. Marie Genevieve Blanchin, Claude Bernard University Lyon 1, Laboratoire de 

Physique de la Matiere Condensee et Nanostructures (LPMCN),. Visit in the framework of the 

project-bilateral collaboration between INPM and LPMCN, Romania-France. 

2. Prof. Dr. C. Manfredotti, Department of Experimental Physics, University of Torino, Italy. 

Visit in the framework of the CEX M3-44/2006 project. 

3. Dr. E. Vittone, Department of Experimental Physics, University of Torino, Italy. Visit in the 

framework of the bilateral CopBil project Romania-Italy. 

4. Prof. Dr. Etienne Goovaerts, University of Antwerpen-CDE, Department of Physics, 

Antwerpen, Belgium. Visit in the framework of the project-bilateral cooperation Romania- 

Flanders (Belgium UA-EMCP Laboratory) and of the CEX M3 - 44/2006 project. 

5. Prof. Dr. Nikos Frangis, Department of Physics, University Aristoteles, Thessaloniki, 

Greece. Visit in the frame of the CEX M3-63/2006 project. 

6. Prof. Dr. John W. Steeds FRS, Department of Physics, University of Bristol, UK. Visit in 

the frame of the CEX M3-63/2006 project. 

7. Prof. Dr. Karin Larsson, Dept. of Materials Chemistry, Angstrom Laboratory, Uppsala, 

Sweden. Visit in the frame of the CEX M3-63/2006 project. 

8. Prof. Abdou Djouadi, Laboratoire des Plasmas et des Couches Minces, Institut des 

Materiaux-Jean Rouxel, Nantes, France. Visit in the frame of the Cex M3-63/2006 project. 

9. Prof. Dr. Christian Steffen Weissmantel, University of Applied Sciences, Hochschule 

Mittweida, Germany; visit in the framework of the CEX M3 44 / 2006 project. 

141

HEAD: Dr. SERGIU V. NISTOR E-mail: snistor@infim.

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