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  DEPARTMENT  

Christoforos Krontiras

Title:   Professor 
Sector:   The Condensed Matter Division 
E-mail:   krontira[_at_]physics.upatras.gr 
Phone:   +302610996067    Fax:  +302610996067 
Address:     


Courses


C.V.
 
Name:  KRONTIRAS CHRISTOFOROS

Personal Data: Born 07/08/1958, Patras-Greece
                           Male, Married (three children), Greek Citizenship

Professional Positions:

 

Feb. 1982 –April 1989:    Research associare, Department of Physics, University of Patras
May 1983 - March 1986: Sabbatical (Semiconductor Laboratory, Technical Research Centre of Finland).
May 1989 -  May 1990:   Military Service
May 1990 - Sep.1995:     Lecturer, Department of Physics, University of Patras
Oct.1995 -Oct.2003:       Assistant Professor, Department of Physics, University of Patras
Oct.2003 – Aug.2009:     Associate Professor, Department of Physics, University of Patras
August 2009 – Today:     Professor, Department of Physics, University of Patras

 

Education:

Ph.D:     1989, Department of Physics, University of Patras
B.Sc:     1981, “Physics”,  University of Patras

Participation in European and National Projects:


Students supervised /currently supervised:
Bsc Theses:  >30
MsC Theses:   4
Phd Theses:   2 completed, 1 in progress


Journal Publications:   >40 (see list below)


International Conferences:   >25 (see list below)
  

 


Scientific Interests
Semiconductor Physics
Soft Matter Physics
Microelectronics

● Electrical characterization of Materials:

- Metal-Silicon thin films (silicides) for microelectronic applications.

- Porous materials (Silicon and Alumina) for microelectronic applications.

- Synthetic materials.

- Carbon nanotubes composites.

 By:

Ø  DC and Transient electrical conductivity measurements

Ø  Dielectric spectroscopy measurements (AC electrical conductivity, C-V,C-f,

  G-V,G-f characteristics in a wide range of frequencies and temperatures).

 

● Study of Front – End processes for group – IV semiconductors CMOS applications :

 -Growth and characterization of ultrathin gate dielectrics (oxides, oxynitrides, high –k materials) on Silicon, strained Silicon and Germanium substrates.

-Study of dopant diffusion/activation for ultra-shallow junctions formation in Germa


Publications
  1. C.Krontiras, K.Pomoni and A.Thedossiou, Resistivity anisotropy of pyrrhotite
    J. Appl. Phys. 55(10), 3894, 1984
  2. I.Suni, H.Ronkainen, S.Eranen, T.Murto, C.Krontiras and M.Finetti, Effect of preamorphization Depth on channeling tails in B+ and As+ implanted Silicon
    Materials Research Society Symposia Proceedings. Vol. 45, 39, 1985
  3. C.Krontiras, J.Salmi, L.Gronberg, I.Suni and J.Heleskivi , Measuments on the electrical transport properties in CoSi2 and NiSi2 formed by thin film reactions
    Thin Solid Films 125, 93, 1985
  4. C.Krontiras, I.Suni, F.M. d'Heurle, F.K. LeGoues and R. Joshi , Electronic transport properties of thin films of WSi2 and MoSi2
    J. Physics F: Met. Phys. 17, 1953, 1987
  5. K.Pomoni and C.Krontiras, Electrical Transport properties in Nickel Monosilicide thin Films
    J. Phys. D: Appl. Phys. 21, 780, 1988
  6. C.Krontiras, K. Pomoni and M. Roilos, Resistivity and the Hall effect for thin MnSi1.73 films
    J. Phys. D:Appl. Phys. 21, 509, 1988
  7. C.Krontiras, L.Gronberg, I.Suni, F.M. d'Heurle and J.Tersoff, J.Engstrom, B.Karlsson and C.S. Petersson, Some properties of ReSi2
    Thin Solid Films 161, 197, 1988
  8. L.Gronberg, C.Krontiras, J.Saarilahti and I.Suni, The effect of ion-irradiation and rapid thermal annealing on TiSi2 and MoSi2
    Solid State Devices , 339, 1988
  9. K.Pomoni and C. Krontiras,, Electrical Transport Properties of NbSi2 thin films
    J. Phys. D:Appl. Phys. , 354, 1990
  10. C. Krontiras, S.N.Georga, S.Sakkopoulos, E. Vitoratos and J. Salmi, Resistivity and all coefficient of CoGe and CoGe2 thin films
    J. Phys. Condens. Matter 2, 3323, 1990
  11. Ch. Krontiras, M.N. Pisanias, J. Mikroyannidis and S.N. Georga , A study of the Temperature Dependence of the electrical Conductivity of a Pyrolysed Cyano-substituted Polyamide derived from 1,4-bis(2-cyan0-2-carboxy- vinyl)benzene
    Polymer 35(13), 2705, 1994
  12. C.D. Diakoumakos, J.A. Mikroyannidis, C.A. Krontiras and M.N. Pisanias, Synthesis and Thermal Stability of the Resins Prepared from the Reac-tions of 1,4-bis(2,2-Dicyanovinyl)benzene with Aromatic Diamines and Electrical Conductivity of the Resulting Materials Following Pyrolysis
    Journal of Polymer Science: Part A: Polymer Chemistry 32(10) , 1915, 1994
  13. A.G.Nassiopoulos, S. Logothetidis, N.L. Fragis, S.Georga, C. Krontiras, N. Xanthopoulos and D.Tampouris, Titanium Disilicide on Silicon by Intediffusion of Titanium and Amor-phous Silicon Multilayers. Transmission Electron Micrοscopy, Spectro-scopic Ellipsometry and Resistivity Measurements
    Thin Solid Films 24(1), 44-50, 1994
  14. C.A. Krontiras, M.N. Pisanias, J. Mikroyannidis and S.N. Georga , An Electrical Conductivity Study of a Cyano - Substituted Polyamide and of the Corresponing Diamide Deived from 1,4-bis(2-cyano-2-carboxyvinyl)benzene: The Effect of Pyrolysis Temperature and Pyrolysis Duration
    Polymer 36, 4729, 1995
  15. C.D. Diakoumakos, J.A. Mikroyannidis, C.A. Krontiras and M.N. Pisanias , Synthesis and Characterization of Polymer Precursors bearing 2,2-DicyanovinylGroups and their Curing to Thermally Stable and Electrically Conductive Resins
    Polymer 36, 1097, 1995
  16. C.D. Diakoumakos, J.A. Mikroyannidis, C.A. Krontiras, M.N. Pisanias and S.N. Georga , Thermosetting Resins Prepared from the Reactions of Diaminomaleoni-trile with 4,4'-Bismaleimidediphenylmethane and Electrical Conductivity Measurements of the Resulting Materials Following Pyrolysis
    European Polymer Journal 31, 1057, 1995
  17. C.A. Krontiras , Michael N. Pisanias , John A. Mikroyannidis and Stavroula N. Georga , Electrical Conductivity of Pyrolysed Polyamides Derived from 1,4 - bis ( 2 - cyano - 2 - carboxivinyl ) benzene and Various Aromatic Diamines
    HighPerformance Polymers 9, 189-203, 1997
  18. E. Stathatos and P. Lianos, C. Krontiras, A dye-sensitized photoelectrochemical cell using a thin-SiO2/poly(ethyleglycol) film as electrolyte support. Characterization by time-resolved luminescence and conductivity measurements
    J. Chem. Phys B 105, 3486-3492, 2001
  19. M. Τheodoropoulou. C.A Krontiras, N.Xanthopoulos, S.N.Georga M.N.Pisanias, C.Tsamis and A.G.Nassiopoulou, Temperature dependence of the transient and AC electrical conductivity of Porous Silicon thin films
    Materials Science and Engineering B101 , 334-337 , 2003
  20. M.Theodoropoulou. C.A Krontiras, N.Xanthopoulos, S.N.Georga M.N.Pisanias, C.Tsamis and A.G.Nassiopoulou, Transient and AC electrical conductivity of Porous Silicon thin films
    Physica Status Solidi (a) 197(1), 279-283 , 2003
  21. P.Karahaliou, M.Theodoropoulou. C.A Krontiras, N.Xanthopoulos, S.N.Georga, M.N.Pisanias, M.Kokonou and A.G.Nassiopoulou, Transient and AC Conductivity of nanocrystalline porous Alumina Thin Films on Silicon with embedded Silicon nanocrystals
    Journal of Applied Physics 95(5), 2776, 2004
  22. M. Theodoropoulou P.K. Karahaliou, C.A. Krontiras, S.N. Georga, N. Xanthopoulos, M.N. Pisanias, C. Tsamis and A.G. Nassiopoulou, Transient and AC electrical transport under forward and reverse bias conditions in aluminum/porous silicon/p-cSi structures
    Journal of Applied Physics 96(12) , 7637, 2004
  23. N. Konofaos, Z. Wang, S.N. Georga, C.A. Krontiras, M.N. Pisanias, J. Sotiropoulos and E.K. Evangelou, Characterization of physical and electrical properties of BaTiO3 films deposited on p-Si by modified polymeric precursor method
    J. Electr. Mater 34(9), 1259-1263, 2005
  24. M. Theodoropoulou, P.K. Karahaliou, S.N. Georga, C.A. Krontiras, Μ.Ν. Pisanias, M. Kokonou and A.G. Nassiopoulou, Interface trap density of anodic porous alumina films of different thicknesses on Si
    J. of Physics (Conference series) 10, 222-225, 2005
  25. N. Konofaos, Z. Wang, Th.K. Voilas, S.N. Georga, C.A. Krontiras, M.N. Pisanias, J. Sotiropoulos and E.K. Evangelou, Temperature dependence of the electrical properties of MOS devices constructed by sol gel deposited BaTiO3 films on p-Si
    J. of Physics (Conference series) 10, 49-52, 2005
  26. M. Theodoropoulou, P.K. Karahaliou, S.N. Georga, C.A. Krontiras, M.N. Pisanias, M. Kokonou and A.G. Nassiopoulou, Thin Porous Anodic Alumina Films: Interface trap density determination
    Ionics, 11(3-4), 236-239, 2005
  27. G.C. Psarras, G.A. Voyiatzis, A. Soto, P.K. Karahaliou, S.N. Georga, C.A. Krontiras, and J. Sotiropoulos, Dielectric and conductivity processes in amorphous and partially crystalline poly(ethylyneterephalate) and poly(ethylenenaphalate) and their co-polymers
    J POLYM SCI POL PHYS 44 (21), 3078=3092, 2006
  28. V. Em. Vamvakas, M. Theodoropoulou, S.N. Georga, C.N. Krontiras and M.N. Pisanias, Correlation between infrared transmission spectra and the interface trap density of SiO2 films
    Microelectronic Reliability, 47(4-5), 834-837, 2007
  29. G. A. Kontos, A. L. Soulintzis, P. K. Karahaliou, G. C. Psarras, S. N. Georga,C. A. Krontiras, M. N. Pisanias, Electrical relaxation dynamics in TiO2 – polymer matrix composites
    eXPRESS Polymer Letters l(12) , 781–789, 2007
  30. G. C. Psarras, K. G. Gatos, P. K. Karahaliou, S. N. Georga,C. A. Krontiras, J. Karger-Kocsis, Relaxation phenomena in rubber/layered silicate nanocomposites
    eXPRESS Polymer Letters,vol. 1(12), 837-845, 2007
  31. V. Gianneta and A.G. Nassiopoulou, C. Krontiras and S.N. Georga, Anodic Porous Alumina Thin Films on Si: Interface Characterization
    Phys. Stat. Sol. (c), 5(12), 3686–3689, 2008
  32. M. Theodoropoulou, D.N. Pagonis and A.G. Nassiopoulou, C.Krontiras and S.N. Georga, Dielectric Characterization of Macroporous Thick Silicon Films in the Frequency range 1Hz – 1MHz
    Physica Status Solidi (c), 5(12), 3597 – 3600, 2008
  33. N. Ioannou D. Skarlatos, C. Tsamis, C. Krontiras, S.N. Georga, A. Christofi and D.S. McPhail, Germanium substrate loss during low temperature annealing and its influence on ion – implanted dopant diffusion
    Applied Physics Letters 93, 101910, 2008
  34. N. Kelaidis, V. Ioannou-Sougleridis, D. Skarlatos, C. Tsamis, C. A. Krontiras, S. N. Georga, B. Kellerman and M. Seacris, Influence of thermal processing on the electrical characteristics of MOS capacitors on strained-Silicon substrates
    Thin Solid Films 517 (1), 350-352, 2008
  35. Zdenko Špitalský, C.A. Krontiras, S.Georga and C. Galiotis, Effect of oxidation treatment on the mechanical and electrical properties of multiwalled carbon nanotubes/epoxy composites
    Composites, Part A: Applied Science and Manufacturing, 40A (6-7), 778-783, 2009
  36. A. Soulintzis, G. Kontos, P. K. Karahaliou, G. C. Psarras, S. N. Georga, C. A. Krontiras and M. N. Pisanias, Electrical relaxation and conductivity processes in polymer matrix – ZnO composites
    Journal of Polymer Science, Part B: Polymer Physics, 47(4), 445-454, 2009
  37. Spitalsky, Z., Tsoukleri, G., Tasis, D., Krontiras, C., Georga, S.N., Galiotis, C. , High volume fraction carbon nanotube-epoxy composites
    Nanotechnology 20 (40), art. no. 405702, 2009
  38. V. Ioannou-Sougleridis, N. Kelaidis, and C. Tsamis D. Skarlatos, C. A. Krontiras, and S. N. Georga Ph. Komninou B. Kellerman and M. Seacrist, Study of interfacial defects induced during the oxidation of ultrathin strained silicon layers
    Journal of Applied Physics , 105(11), 114503/1-114503/7, 2009
  39. Špitalský, Z., Aggelopoulos, C., Tsoukleri, G., Tsakiroglou, C., Parthenios, J., Georga, S., Krontiras, C., Tasis, D., Papagelis, K., Galiotis, C. , The effect of oxidation treatment on the properties of multi-walled carbon nanotube thin films
    Materials Science and Engineering: B, 165(3), 135-138, 2009
  40. N. Ioannou, D. Skarlatos, N. Z. Vouroutzis, C. A. Krontiras, S. N. Georga and C. Tsamis, Gallium implantation and diffusion in crystalline Germanium
    Electrochemical and Solid-State Letters, 13(3), H70-H72, 2010
  41. V. Ioannou-Sougleridis, N. Kelaidis, D. Skarlatos, C. Tsamis, C. A. Krontiras, S. N. Georga, Ph. Komninou, Th. Speliotis, P. Dimitrakis, B. Kellerman, and M. Seacrist, Influence of thermal oxidation on the interfacial properties of ultrathin strained silicon layers
    Submitted for publication, , 2010
  42. A. Kalini, K. G. Gatos, P. K. Karahaliou, S. N. Georga, C. A. Krontiras, G. C. Psarras, J. Karger-Kocsis, Probing the Dielectric Response of Polyurethane/Alumina Nanocomposites
    Journal of Polymer Science Part B: Polymer Physics 48(22), 2346–2354, 2010
  43. L.Sygellou, V.Gianneta, N.Xanthopoulos, D.Skarlatos, S.Georga, C.Krontiras, S.Ladas, S.Kennou, ZrO2 and Al2O3 thin films on Ge(100) grown by ALD : An XPS investigation
    Surface Science Spectra,WCF Submission 74 , XXX, 2010



Other Info

tmima/staff/files/File/THALIS PROJECT_GERMANIUM MOS TECHNOLOGY_FIGURES.pdf

 European and National Projects:

  • GSRT-NON-EU-204"Process-induced strain modification in strained silicon layers and influence on device performance",  1/2006-12/2007
  • GSRT-PENED-03ED496,“Dopant diffusion and activation in Group-IV semiconductors (Strained Silicon and Germanium) for novel nanoelectronic devices”  [11/2005-12/2008]
  • GSRT- PENED-03 ΕΔ469 11/2005-12/2008

  • GSRT-NON-EU-204,“Process-induced strain modification in strained silicon layers and influence on device performance” [1/2006-12/2007]
  • Karatheodory-2009, University of Patras ,"Front-End Processes for Germanium MOS applications" [1/2/2010-present
  • GSRT-HERAKLEITOS II,12/244/5, "Charge trapping devices (memories) based on novel high-k dielectrics" [Accepted.Beginning 1/10/2010]
  • GSRT-HERAKLEITOS II,12/138/5,"Growth and characterization of high-k dielectrics on group-IV semiconductor substrates" [Accepted.Beginning 1/10/2010]  [Coordinator]

International Conferences:

 

1.    Electrical and optical properties ofNiobium doped Tin oxide films, E.Koskiahde, H.Kattelus, C.Krontiras and I.Suni, Sixth International Conference on thin films Stockholm, Sweden, August 1984.
2.    Electrical resistivity and hall effect measurements on CoSi2 and NiSi2 formed by thin films reactions, C.Krontiras, J.Salmi, L.Gronberg, I.Suni and J.Heleskivi, , Sixth international Conference on thin films, Stockholm, Sweden, August 1984.
3.    The effect of ion-irradiation and rapid thermal annealing on TiSi2 and MoSi2, L.Gronberg, C.Krontiras, J.Saarilahti and I.Suni, Solid State Devices, 339, (1988): 17th European Solid State Device Research Conference ESSDERC 87, Bologna, Italy, Sept, 14 -17, 1987.
4.    Transient and AC electrical conductivity of porous Silicon thin films. Μ.Theodoropoulou, C.A. Krontiras, N. Xanthopoulos, S.N. Georga, M.N. Pisanias, C. Tsamis and A.G. Nassiopoulou. Porous Semiconductors Science and Technology, 3rd International Conference, Tenerife, 11-15 March 2002.
5.    Temperature Dependence of the Transient and AC Conductivity of Porous Silicon thin films. Μ.Theodoropoulou, C.A. Krontiras, N. Xanthopoulos, S.N. Georga, M.N. Pisanias, C. Tsamis and A.G. Nassiopoulou, E-MRS 2002 SPING MEETING, Strasbourg (France), June 18-21, 2002.
6.    Thickness and temperature dependence of the AC electrical conductivity of porous Silicon thin films M. Theodoropoulou, P. Karahaliou, S.N. Georga, C.A Krontiras, N. Xanthopoulos, M.N. Pisanias, C. Tsamis and A.G. Nassiopoulou, Accepted for presentation in 203rd Meeting of the Electrochemichal Society F1- Science and Technology of Dielectrics in Emerging Fields, April 27-May 2, 2003.
7.    “ThinPorousAnodicAluminaFilms: Interfacetrapdensitydetermination“, M. Theodoropoulou, P.K. Karahaliou, S.N. Georga, C.A. Krontiras, M.N. Pisanias, M. Kokonou and A.G. Nassiopoulou, SolidStateIonics-TransportProperties, Patras (September 2004).
8.    “Interfacetrapdensitydeterminationinaluminum/porousalumina/p-Sistructuresofdifferentthickness”, M. Theodoropoulou,P.K. Karahaliou, S.N. Georga, C.A. Krontiras, M.N. Pisanias, M. Kokonou and A.G. Nassiopoulou: 2ndMMNConference, Athens(2004)
9.    “Temperature dependence of the electrical properties of MOS devices constructed by sol gel deposited BaTiO3 films on p-Si”, N. Konofaos, Z. Wang, Th.K. Voilas, S.N. Georga, C.A. Krontiras, M.N. Pisanias, J. Sotiropoulos and E.K. Evangelou: 2nd MMN Conference, Athens (2004)
10. “Electrical properties of BatiO3 films on Si by a modified polymeric precursor method”, Z. Wang, N. Konofaos, S.N. Georga, C.A. Krontiras, M.N. Pisanias, J. Sotiropoulos and E.K. Evangelou: AVS – The science and Technology Society Conference, New Mexico, USA, May 23-24, (2005).
11. “Oxidation of strained silicon in N2O ambient”, D. Tsoromokos, D. Skarlatos, N. Ioannou, C. Tsamis, M. Theodoropoulou, S.N. Georga, C.N. Krontiras, B. Kellerman and M. Seacrist:, MRS, 29 May-2 June, Nice, France, (2006).
12. “Correlation between infrared transmission spectra and the interface trap density of SiO2 films”, V. Em. Vamvakas, M. Theodoropoulou, S.N. Georga, C.N. Krontiras and M.N. Pisanias. WoDiM, Catania, Italy, June 26-29, (2006).
13. “Dielectric and conductivity dispersions in natural and polyurethane rubber blend-layered silicate loaded nanocomposites”, A. Kalini, K. G. Gatos, P. K. Karahaliou, S. N. Georga, C. A. Krontiras, G. C. Psarras, J. Karger-Kocsis,. International Confernce on Structural Analysis of Advanced Materials,ICSAM-2007, September 2-6, (2007), Patras, Greece.
14. «Electrical relaxation phenomena in TiO2-polymer matrix composites.», G. A. Kontos, A. L. Soulintzis, S. N. Georga, J. Sotiropoulos, C. A. Krontiras,P. K. Karahaliou, G. C. Psarras, 6th International Symposium on Advanced Composites (COMP 2007),16-18 May, (2007), Corfu, Greece, Proceedings of the Conference σε CD-ROM (COMP2007-048).