Alin VELEA, PhD student
Researcher

phone
: +40-21-369.01.70 / 195, 225
fax:     +40-21-369.01.77
e-mail: velea@infim.ro
www.infim.ro/~velea/


Education: Professional skills:  
Research contributions on topics of: Patents request as co-author:
Laser obtained two-dimensional photonic microstructures on the surface of glassy chalcogenide alloys based on As and S
M. Popescu, A. Lőrinczi, A. Velea, H. Niciu, M. Zamfirescu, F. Jipa, S. Miclos, M. Ciobanu, D. Savastru, A. Popescu
OSIM Patent Request, No. A/01135/19.11.2010
 
Preparation method of a sensitive material in an aqueous solution of ammonium nitrate and ammonium nitrate sensor based on carbon nanotubes functionalized with barium stearate
I. D. Simandan, M. Popescu, A. Velea, A. Lőrinczi
OSIM Patent Request, No. A/01014/26.10.2010
 
Method for the production of thin layers and self-organized quantum dots based on chalcogenic material
A. Velea, M. Popescu, I.-D.Simandan, A. Lőrinczi,
OSIM Patent Request No. A/01013/26.10.2010
 
Method for obtaining chalcogenic glass optical microelements for infrared
H. Niciu, D. Niciu, M. Popescu, A. Lorinczi, A. Velea, A. Manea, M. Lazarescu,
OSIM Patent Request, No. A/01136 / 19.11.2010
 
Method for the synthesis of ultrapure As2S3 glass de for optical application
M. Popescu, F. Sava, A. Lorinczi, A. Velea, H. Niciu, D. Niciu, S. Hermine, D. Radu 
OSIM Patent Request, No. A/00603/05.08.2008
 
Complex memory cells system based on amorphous chalcogenide alloys
M. Popescu, A. Lőrinczi, F. Sava, E. Ion, A. Velea, G. Socol, Ion N. Mihăilescu
OSIM Patent Request, No. A2008/00724/ 18.09.2008
 
Selective sensor for lead ions in aqueous solutions
M. Popescu, A. Lorinczi, E. Apostol, F. Sava, E. Ion, A. Velea G. Socol, I.N. Mihailescu
OSIM Patent Request, No. A/2007-00825/30.11. 2007
Professional experience acquired by research appointments abroad:
Summer school student, Deutsches Elektronen Sychrotron (DESY), Hamburg, Germany,
 15.07.2007 - 15.09.2007

 
Awards and international recognition:
Publications:

Silver doped As2S3 chalcogenide films: A diffusion study
A. Lőrinczi, M. Popescu, F. Sava, A. Velea, I.-D. Şimăndan
Phys. Status Solidi C 8, No. 9, 2617–2620 (2011)
 
Photonic microstructures generated by intense laser pulses on chalcogenide glass surface
M. Popescu, F. Jipa, A. Velea, M. Zamfirescu, C. Florea
Journal of Intense Pulsed Lasers and Applications in Advanced Physics, 1(1), p. 25-27 (2011)
 
Extreme energies for material processing
M. Popescu, L. Diamandescu, A. Velea  Journal of Intense Pulsed Lasers and Applications in Advanced Physics, 1(1), p. 21-24 (2011)
 
Intense pulsed laser irradiation of bulk cystal
C. Florea, M. Zamfirescu, F. Jipa, A. Velea
Journal of Intense Pulsed Lasers and Applications in Advanced Physics, 1(1), 
p. 1-5 (2011)
 
Sensor of nitrogen dioxide based on single wall carbon nanotubes and manganese-porphyrin
M. Popescu, I.D. Simandan, F.Sava, A. Velea, E. Fagadar-Cozma
Digest Journal of Nanomaterials and Biostructures, 6(3), p. 1253-1256 (2011)

 
New insight into phase change memories
A. Velea
Journal of Non-Crystalline Solids, 357(14), p. 2626-2631 (2011)
 
Moulding procedure for the preparation of infrared glassy microlenses and prisms based on arsenic sulphide chalcogenide glass
H. Niciu, M. Popescu, A. Velea, A. Lorinczi, A. Manea, D. Niciu, M. Lazarescu 
Chalcogenide Letters, 7(11), p. 625-629 , (2010)
 
Synthesis and luminescence properties of Nd-doped chalcogenide glass (Ge5As2S13 (NdCl3)x (x=0.3 %, 0.5 %)
S. Georgescu, A. M. Voiculescu, S. Salamu, H. Niciu, D. Niciu, M. Popescu, A. Lorinczi, A. Velea, D. Simandan
Chalcogenide Letters, 7(11), p. 621-624, (2010)

Structural details of the Ag-As2S3 interface obtained by vacuum thermal evaporation followed by green laser irradiation
A. Lorinczi, A. Velea, E. Matei, I.-D. Simandan, M. Popescu 
Chalcogenide Letters, 7(11), p. 609-612, (2010)  
 
Simulation of phase change materials using cellular automata
A. Velea 
Digest Journal of Nanomaterials and Biostructures, 5(4), p. 1023-1027, (2010)
 
Two-dimensional photonic structures based on As-S chalcogenide glass
M. Popescu, A. Velea, A. Lorinczi, M. Zamfirescu, F. Jipa, S. Miclos, A. Popescu, M. Ciobanu, D. Savastru 
Digest Journal of Nanomaterials and Biostructures, 5(4), p. 1101-1105, (2010)
 
Biogenic production of nanoparticles
M. Popescu, A. Velea, A. Lorinczi 
Digest Journal of Nanomaterials and Biostructures, 5(4), p. 1035-1040, (2010)
 
Preparation and properties of Barium stearate multilayers with carbon nanotubes, manganese porphyrin and silver nitrate
I. D. Simandan,M. Popescu, A. Lorinczi, A. Velea, E. Fagadar-Cosma 
Digest Journal of Nanomaterials and Biostructures, 5(4), p. 1029-1033, (2010)
 
Quantitative structure-activity relationship in antidiabetic drugs by using topological descriptors"
M. Popescu, A. Velea, C. Mihai, S. Tivadar 
Digest Journal of Nanomaterials and Biostructures, 5(3), p. 629-633, (2010)
 
Structure and Mossbauer measurements on SnSe2 bulk and thin films 
I. Bibicu, A. Lorinczi, A. Velea, F. Sava, M. Popescu
Optoelectronics and Advanced Materials-Rapid Communications, 4(10), p. 1568-1571, (2010)
 
Langmuir and Langmuir-Blodgett films based on stearic acid, barium stearate and carbon nanotubes 
I. D. Simandan, F. Sava, A. Velea, A. Lorinczi, M. Popescu
Optoelectronics and Advanced Materials-Rapid Communications, 4(8), p. 1178-1181, (2010) 
 
Structure and properties of silver doped SnSe2 and Ge2Sb2Te5 thin films prepared by pulsed laser deposition 
M. Popescu, A. Velea, F. Sava, A. Lorinczi, A. Tomescu, C. Simion, E. Matei, G. Socol, I. N. Mihailescu, A. Andonie, I. Stamatin
Physica Status Solidi A-Applications and Materials Science, 207(3), p. 516-520, (2010) 
 
Commuton – a new concept in switching materials
M. Popescu, A. Velea, A. Lőrinczi, F. Sava
Journal of Ovonic Research 5(2), p. 27-34, (2009)
 
Phase change materials: chemical bonding and structural properties
A. Velea, M. Popescu
Proceedings of the Romanian Academy Series A-Mathematics Physics Technical Sciences Information Science, 10(3), pag.  230-236 (2009)  
 
Tellurium based phase change materials
A. Velea
J. Optoelectron. Adv. Mater. 11(12), pag. 1983-1987 (2009)
 
Chalcogenide photonic structures
M. Popescu, D. Savastru, A. Popescu, S. Micloş, A. Lőrinczi, F. Sava, A. Velea, L. Baschir, M. Ciobanu, E. Matei, G. Socol, I. N. Mihǎilescu, H. Niciu
Optoelectronics and Advanced Materials-Rapid Communications 3(9), pag. 851 – 859 (2009).
 
Matrix-assisted photo-amorphization effect in As40S30Se30 films with silver
M. Popescu, K. Petkov, F. Sava, J. Taseeva, A. Lőrinczi, A. Velea
J. Optoelectron. Adv. Mater. 11(12), pag. 1990 – 1993 (2009)
 
Direct laser writing of two-dimensional photonic structures in amorphous As2S3 thin films
A. Popescu, S. Miclos, D. Savastru, R. Savastru, M. Ciobanu, M. Popescu, A. Lőrinczi, F. Sava, A. Velea, F. Jipa , M. Zamfirescu
J. Optoelectron. Adv. Mater. 11(11), pag. 1874 – 1880 (2009).
 
Silver/amorphous As2S3 heterostructure
M. Popescu, F. Sava, A. Lorinczi, A. Velea, M. Leonovici, S. Zamfira
J. Optoelectron. Adv. Mater. 11(11), pag. 1586 – 1594 (2009)
 
Optical fiber coupling to a laser diode through chalcogenide microlenses
A. Velea, M. Rusu, M. Popescu
J. Optoelectron. Adv. Mater. 11(10), pag. 1379-1383 (2009)
 
Crystalline-amorphous and amorphous-amorphous transitions in phase-change materials
M. Popescu, F. Sava, A. Velea, A. Lorinczi  
Journal of Non-Crystalline Solids 38.55(37-42), pag. 1820-1823 (2009)
 
Modelling of dissolution kinetics of thin amorphous chalcogenide films
M. Popescu, F. Sava, A. Lőrinczi, A. Velea, M. Vlček , H. Jain
Philosophical Magazine Letters 89(6), pag. 370–376 (2009)
 
Ceramic materials Ba(1-x)SrxTiO3 for electronics - Synthesis and characterization
C. Berbecaru, H. V. Alexandru, C. Porosnicu, A. Velea, A. Ioachim, L. Nedelcu, M. Tonsan,
Thin Solid Films 516(22), pag. 8210-8214  (2008)  
 
Alternating barium stearate and copper stearate LB thin films
M. Popescu, A. Lorinczi, A. Velea, F. Sava
J. Optoelectron. Adv. Mater. 10(12), pag. 3413-3415 (2008)
 
The modification induced by UV radiation in spherical microlenses made of glassy arsenic sulphide
M. Rusu , A. Velea , M. Popescu
J. Optoelectron. Adv. Mater. 10(12), pag. 3169-3171 (2008)
 
Phase-change electrical memory elements and devices,
M. Popescu, A. Lőrinczi, F. Sava, A. Velea, E. Matei, G. Socol, I. N. Mihailescu,
J. Optoelectron. Adv. Mater. 10(10), pag. 2616-2621 (2008)
 
DC conductivity in GeSb2Te4 and (GeSb2Te4)90(SnSe2)10 phase change materials
M. Popescu, M. Kubliha, J. Kaluzny, A. Velea, A. Lőrinczi 
Journal of Optoelectronics and Advanced Materials, 9(12), 3951-3953 (2007)
 
Crystallization of PLD deposited ITO thin films by thermal treating in various gaseous environments
C. Viespe, C. Grigoriu, M. Popescu, F. Sava, A. Lőrinczi, A. Velea, S. Zamfira
Journal of Optoelectronics and Advanced Materials, 9(11), 3563-3566 (2007)