Stefan Frunza,  Ph. D
Scientific
Researcher 1-st degree


phone: +40-21369 0170 / 199, 148, 178    
Fax    : +40-21369 0177

E-mail: frunza@infim.ro
http://www.infim.ro/~frunza/

Recent positions held and present:
 
1996-1998 Scientific Director, National Institute of Materials Physics
1998-2008 General Director, National Institute of Materials Physics
1996-Senior researcher 1st degree, National Institute of Materials Physics
2005-Supervisor of PhD Theses, associated professor at the Faculty of Physics, University of Bucharest
2010-President of the Scientific Council of NIMP
 
 
Research experience

Growth of alkali halide single crystals

Applicative research related to liquid crystal displays and their technologies
Alignment layers of liquid crystals, alignment mechanisms, anchoring energy
Dynamics of the molecules by broadband dielectric spectroscopy
2D and 3D confinement of liquid crystals.
 
Recently published paper (2008 - 2011)
 
On the Optical Thickness Dependence of the Electro-Optical Properties of an in-Plane Switching LC Cell ,T. Beica, S. Frunza, I. Zgura, R. Moldovan, A. Dinescu, J. Optoelectr. Adv. Mater. 8, 558-563 (2008)
 
Relaxation processes of water confined to AlMCM-41 molecular sieves. Influence of the hydroxyl groups of the pore surface,L. Frunza, A. Schonhals, H. Kosslick, S. Frunza  Eur.
Phys. J. E. 26, 379-386 (2008)

Phase behavior and molecular mobility of n-octylcyanobiphenyl confined to molecular sieves: Dependence on the pore size, L. Frunza, S. Frunza, H. Kosslick, A. Schonhals  Phys. Rev. E. 78, 051701 (2008)
 
Dynamics of Cyanophenyl Alkylbenzoate Molecules in a Surface Layer Adsorbed onto Aerosil. I. Cyanophenyl Hexylbenzoate,S. Frunza, A. Schonhals, H. Goering, D. Manaila-Maximean, T. Beica, L. Frunza, R. Moldovan, Mol. Cryst. liq. Cryst. 495, 60-79 (2008)

Synthesis and phase transition studies on composite materials polymer particles/nematic liquid crystals, D. Manaila Maximean, C. Rosu, D. Donescu, S. Frunza, Mol. Cryst. Liq. Cryst. 495, 158-168 (2008)

Specific interactions of nematic liquid crystals for the alignment on substrates, R. Moldovan, T. Beica, I. Zgura, S. Frunza, M. Poterasu, J. Optoelectr. Advanced Mater. Symposia (2009)


Composites containing confined n-octyl-cyanobiphenyl: Monomer and dimer species in the surface layer by in situ FTIR spectroscopy ,Frunza L, Frunza S, Poterasu M, Beica T, Kosslick, Stoenescu D, Spectrochim. Acta Part A-Mol. Biomolec. Spectrosc., 72, 248-253, (2009)
 
Method measurement cell and experimental setup for the determination of temperature dependence of optical birefringence of liquid crystals,T. Beica, S. Frunza, I. Zgura, R. Moldovan, A. Dinescu, BREVET RO 122061B1/28.11.2008

Temperature dependence of the density of some liquid crystals in the alkyl cyanobiphenyl series, I. Zgura, R. Moldovan, T. Beica, S. Frunza Cryst. Res. Technol. 44, 883-888 (2009)

Influence of polarizing electric fiels on the electrical and optical properties of polymer- clay composite system, C. Rosu, D. Manaila Maximean, D. Donescu, S. Frunza, A. Sterian
Modern Physics Letters B 24, 65-73 (2010)
 
Involvement of cyan and ester groups in surface interactions of aerosil - cyanophenyl alkylbenzoate systems with high silica density. FTIR and TGDTA investigations , L. Frunza, S. Frunza, I. Zgura, T. Beica, N. Gheorghe, P. Ganea, D. Stoenescu, A. Dinescu, A.Schonhals, Spectrochim. Acta A: Molecular and Biomolecular Spectroscopy, 75, 1228-1235 (2010)
 
Vibrational and molecular dynamics of a nanoconfined liquid crystal, A. Schonhals, S. Frunza, L. Frunza, T. Unruh, B. Frick, R. Zorn ,Eur. Phys. J. Special Topics 189, 251-255 (2010)

 
Low power laser induced optical nonlinearities in organic molecules, I. Dancus, V.I. Vlad, A. Petris, S. Frunza, T. Beica, I. Zgura, F.A. Nicolescu, V.V. Jerca, D.M. Vuluga Rom . Rep. Phys.  62,  567-580 (2010)
 
Molecular Relaxation Processes in a MOF-5 Structure Revealed by Broadband Dielectric Spectroscopy: Signature of Phenylene Ring Fluctuations, S. Frunza, A. Schonhals, L. Frunza, P. Ganea, H. Kosslick, J. Harloff, A. Schulz
, J. Phys. Chem. B  114, 12840-12846 (2010)
 
Comment on Investigating hydration dependence of dynamics of confined water: Monolayer, hydration water, and Maxwell-Wagner processes [J. Chem. Phys. 128, 154503 (2008)] Y. Ryabov, A. Gutina, Y. Feldman, S. Frunza, L. Frunza, A. Schonhals, J. Chem. Phys. 133, 037101 (2010)
 
Dynamics of cyanophenyl alkylbenzoate molecules in the bulk and in a surface layer adsorbed onto aerosil. Variation of the lengths of the alkyl chain, S. Frunza, A. Schonhals, L. Frunza, T. Beica, I. Zgura, P. Ganea, D. Stoenescu, Chem. Phys. 372, 51-60 (2010)
 
Molecular mobility of nematic E7 confined to molecular sieves with a low filling degree, A. R. Bras, S. Frunza, L. Guerreiro, I. M. Fonseca, A. Corma, L. Frunza, M. DionÝsio, A. Schonhals, J. Chem. Phys. 132, 224508 (2010)
 
Nanostructured gold layers. I. Deposition by Vacuum evaporation at small angles of incidence ,Beica, T., Frunza, S., Zgura, I., Frunza, L., Cotarlan, C., Negrila, C, Vlaicu, A. M., Zaharia, C. N. J. Optoel. Adv. Mater. 12, 347-353 (2010)
 
Nanostructured gold layers. II. Gold deposition onto polystyrene substrate, Zgura, I., Beica, T., Frunza, S., Rasoga, O., Galca, A., Frunza, L., Moldovan, A., Dinescu, M., Zaharia, C.J. Optoel. Adv. Mater. 12, 354-359 (2010)
 
Nanostructured gold layers. III. Functionalization of gold layers obliquely deposited onto polystyrene substrate, Zgura, I., Beica, T., Frunza, S., Frunza, L., Cotirlan-Simioniuc, C., Ungureanu, F., Gheorghe, N., Rasoga, O., Velula, T., Zaharia, C.J. Optoel. Adv. Mater. 12, 1729-1738 (2010)
 
New analytical approximation of diffraction size broadened peak profile for spherical crystallites with a lognormal distribution , Popa N.C., Teodorescu C.M.,Frunza S., J. Appl. Cryst. 43, 1027-1030 (2010)
 
Nanostructured SiOx layers as substrates for liquid crystal local ordering. I. Functionalization to bind Bovine Serum Albumin, I. Zgura, T. Beica, S. Frunza, L. Frunza, P. Ganea, C. Negrila, F. Ungureanu, A. Nuta, A.-A. Sorescu, I. Bunea, C. N. Zaharia, Optoelectron. Adv. Mater.-Rapid Comm. 5, 318-323 (2011).

Optically induced birefringence of a p-aminoazobenzene-epoxy resin derivative,T. Beica, I. Zgura, S. Frunza, P. Ganea, S. Frunza, L. Dumitrache, V. Raditoiu, L. Wagner Rom. Rep. Phys. 63, (2011).

Awards

1988 Romanian Academy Prize D.Hurmuzescu
2000 Knight of the National Order Steaua Romaniei for research contributions
2008 Romanian Ministry of Education and Research, Excellence in research, Prize for the whole activity in a National Institute of Research and Development