Contact Information

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Dr. Christos Garoufalis

Current position:

a) Post doc researcher, Department of Materials' Science, University of Patras, Greece.

b) Adjunct Lecturer at the Technological Institute of Ionian Islands, Greece.

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Education

University of Patras, Greece:
Ph.D., Computational Physics, 2003
Dissertation:"Theoretical Study of Electronic and Optical Properties of Silicon Quantum dots"

University of Patras, Greece
M.Sc., Mathematical and Computational Physics, 1998

University of Patras, Greece
B.Sc., Physics, 1996


Research Interests

Computational Quantum Chemistry, Computational Physics, Density Functional Theory, Semiconductor clusters, structural - electronic - optical properties of semiconducting nanomaterials, non linear optical properties of molecules and clusters

 

List of Journal publications  (google scholar)

1. C. S. Garoufalis, A. D. Zdetsis and S. Grimme "High Level Ab Initio Calculations of the Optical Gap of Small Silicon Quantum dots" Phys. Rev. Lett. 87, 276402-1 (2001)

2. Garoufalis, C.S., Zdetsis, A.D. "Real space optical gap calculations in oxygenated Si nanocrystals", (2005) Journal of Physics: Conf. Series, 10 1, Pages 69-72

3. Garoufalis, C.S., Skaperda, M.S., Zdetsis, A.D. "The optical gap of small Ge nanocrystals", (2005) Journal of Physics: Conf. Series, 10 1, Pages 97-100.

4. Zdetsis, A.D., Garoufalis, C.S., Skaperda, M.S., Koukaras, E.N. "Variation and adjustment of the optical gap of small Si nanocrystals by partial substitution of Si with Ge", (2005) Journal of Physics: Conference Series, 10 1, Pages 101-104.

5. A. D. Zdetsis, C. S. Garoufalis and Stefan Grimme, " Real Space Ab Initio Calculations of Excitation Energies in Small Silicon Quantum Dots", NATO Advanced Research Workshop on "Quantum Dots: Fundamentals, Applications, and Frontiers" Crete 2003, (invited paper) B. A. Joyce et al. (eds.), 317-332, Kluwer-Springer (2005).

6. C. S. Garoufalis and A. D. Zdetsis "High accuracy calculations of the optical gap and absorption spectrum of oxygen contaminated Si nanocrystals" Phys. Chem. Chem Phys. 8 (7), pp. 808-813 (2006).

7. E. N. Koukaras, C. S. Garoufalis and A. D. Zdetsis "Structure and properties of the Ni@Si12 cluster from all-electron ab initio calculations", Phys. Rev. B, 73, 235417 (2006).

8. D. Zdetsis , E. N. Koukaras and C. S. Garoufalis, "Structural Properties and Magic Structures in Hydrogenated Finite and Infinite Silicon Nanowires", App. Phys. Lett. 91, 203112, (2007)

9. D. Xenides and C. S. Garoufalis, "Electric polarizabilities of CxSi4-x (0<= x <= 4) clusters. A conventional and Time-Dependent Density Functional study", J. Comp. Methods in Science and Engineering, 7 (2007) 287–296.

10. G. D. Panagiotou, T. Petsi, J. Stavropoulos, K. Bourikas, C. S. Garoufalis, C. Kordulis, A. Lycourghiotis, "Towards the local structure of the Co(II), Ni(II), Cr(VI) and W(VI) ionic species formed upon impregnation on titania", Stud. Surf. Sci. Catal. 162, 809 (2007).

11. E. N. Koukaras, A. D. Zdetsis and C. S. Garoufalis, "High-stability Finite-Length Silicon Nanowires: A Real Space Theoretical Study", AIP Conf. Proc. 963, 375 (2007)

12. G. D. Panagiotou, T. Petsi, K. Bourikas, C. S. Garoufalis, A. Tsevis, N. Spanos, C. Kordulis, and A. Lycourghiotis, "Mapping the surface (hydr) oxo – groups of titanium oxide and its interface with an aqueous solution: the state of the art and a new approach", Adv Colloid Interface Sci., 142(1-2):20-42 (2008)

13. D. Zdetsis , E. N. Koukaras and C. S. Garoufalis, "Novel effects in finite-length silicon nanowires", Physica Status Solidi (a), Volume 205 Issue 11, Pages 2625 - 2629 (2008).

14. T. Petsi, G. D. Panagiotou, C. S. Garoufalis, C. Kordulis, P. Stathi, Y. Deligiannakis, A. Lycourghiotis and K. Bourikas, "Interfacial Impregnation Chemistry in the Synthesis of Cobalt supported Titania Catalysts", Chemistry A European Journal, Volume 15 Issue 47, Pages 13090 - 13104 (2009).

15. E. N. Koukaras, C. S. Garoufalis and A. D. Zdetsis, "Elastic properties of ultra-thin hydrogenated silicon nanowires based on all electron mixed ab initio and semiempirical calculations", AIP Conf. Proc. 1148, 376 (2009).

16. K. Bourikas, G Stayropoulos C. S. Garoufalis, T. Petsi C. Kordulis, and A.Lycourghiotis, "Interfacial Impregnation Chemistry in the Synthesis of Nickel Catalysts Supported on Titania", Chemistry A European Journal, 17, 1201-1213, (2011).

17. C. S. Garoufalis, "Optical gap and excitation energies of small Ge nanocrystals" J Math Chem (2009) 46:934–941.

18. D. Zdetsis, C. S. Garoufalis and E. N. Koukaras "Mixed silicon–germanium nanocrystals: a detailed study of SixGe47?x : H" J Math Chem (2009) 46:942–951.

19. A. D. Zdetsis, E. N. Koukaras and C. S. Garoufalis "A parallel study of Ni@Si12 and Cu@Si12 nanoclusters" J Math Chem (2009) 46:971–980.

20. C. S. Garoufalis and A. D. Zdetsis "Optical properties of ultra small Si nanoparticles: potential role of surface reconstruction and oxygen contamination" J Math Chem (2009) 46:952–961.

21. George D. Panagiotou, Theano Petsi, John Stavropoulos, Christos S. Garoufalis, Kyriakos Bourikas, Christos Kordulis, Alexis Lycourghiotis, "Elucidation of the surface configuration of the Co(II) and Ni(II) aqua complexes and of the Cr(VI), Mo(VI) and W(VI) monomer and polymer oxo-species deposited on the titania surface during impregnation", Stud. Surf. Sci. Catal., 175, 117-125 (2010).

22. C S Garoufalis, "Oxygen terminated Goldberg-type Si quantum dots as candidates for stable Si fullerene-like cages" J. Comp. Th. Nanoscience Vol. 8, 2279–2284, 2011.

23. P. Poulopoulos, S. Baskoutas, S.D. Pappas, C.S. Garoufalis, S.A. Droulias, A. Zamani and V. Kapaklis, " Intense quantum confinement effects in Cu2O thin films " J. Phys. Chem. C 115 (30), pp 14839–14843 (2011).

24. S. Baskoutas, C.S. Garoufalis, A.Terzis, "Linear and non linear absorption coefficients and refraction index changes in a single and double inverse parabolic quantum well", Eur. Phys. J. B 84, 241–247 (2011).

25. Zaiping Zeng, Christos S. Garoufalis, and Sotirios Baskoutas, "Combination effects of tilted electric and magnetic fields on donor binding energy in a GaAs/AlGaAs cylindrical quantum dot", J. Phys. D 45, 235102 (2012).

26. Zaiping Zeng, C. S. Garoufalis, S. Baskoutas and A. F. Terzis "Stark Effect of Donor Binding Energy in a Self-assembled GaAs/AlGaAs Quantum Dot Subjected to a Tilted Electric Field", Phys. Lett. A 376 (42-43) , pp. 2712-2716 (2012).

27. Zaiping Zeng, Christos S. Garoufalis, Sotirios Baskoutas and Andreas F. Terzis, "Tuning the Donor Binding Energy in Semiconductor Nanostructures by a Tilted Magnetic Field", J. App. Phys 112, 064326 (2012).

28. Sotirios Baskoutas, Zaiping Zeng, Christos S. Garoufalis and Gabriel Bester, "Tuning of the Optical Emission Polarization of ZnO Nanorods by an applied Hydrostatic Pressure", Journal of Physical Chemistry C 116 (50) , pp. 26592-26597 (2012)

29. Yashar Azizian-Kalandaragh, Ali Khodayari, Zaiping Zeng, Christos S. Garoufalis, Sotirios Baskoutas, Lionel Cervera Gontard, " Strong quantum confinement effects in SnS nanocrystals produced by ultrasound-assisted method", J. Nanoparticle Research 15:1388 (2013).

30. Zeng, Z., Paspalakis, E., Garoufalis, C.S., Terzis, A.F., Baskoutas, S. "Optical susceptibilities in singly charged ZnO colloidal quantum dots embedded in different dielectric matrices", J. App. Phys. 113 (5) , art. no. 054303 (2013) .

31. Zeng, Z., Garoufalis, C.S., Baskoutas, S., Bester, G.  "Electronic and optical properties of ZnO quantum dots under hydrostatic pressure", Phys. Rev. B 87 (12),  125302 (2013).

32. Zaiping Zeng, Christos S. Garoufalis, Andreas F. Terzis and Sotirios Baskoutas, "Linear and nonlinear optical properties of ZnO/ZnS and ZnS/ZnO core shell quantum dots: Effects of shell thickness, impurity, and dielectric environment", J. Appl. Phys. 114, 023510 (2013)

33. Zaiping Zeng, George Gorgolis, Christos S. Garoufalis, and Sotirios Baskoutas, "Competition Effects of Electric and Magnetic Fields on Impurity Binding Energy in a Disc-Shaped Quantum Dot in the Presence of Pressure and Temperature", Science of Advanced Materials 6,586  (2014)

34. Zaiping Zeng, Christos S. Garoufalis, Sotirios Baskoutas, "New Insights in the Excitonic Emission of ZnS Colloidal Quantum Dots", The Journal of Physical Chemistry C 118, 10502 (2014)

35. Zaiping Zeng, Christos S. Garoufalis, Sotirios Baskoutas, "Linear and nonlinear optical susceptibilities in a laterally coupled quantum-dot-quantum-ring system",  Physics Letters A 378 2713 (2014).

36.  Zaiping Zeng, Alexia Petoni, Christos S. Garoufalis, Sotirios Baskoutas and Gabriel Bester, "Near-band-edge exciton polarization change in ZnO nanowires", Physical Chemistry Chemical Physics 17 (2) 1197-1203 (2015).

37.  Zaiping Zeng, Christos S. Garoufalis, Sotirios Baskoutas and Gabriel Bester, "Excitonic optical properties of wurtzite ZnS quantum dots under pressure", The Journal of Chemical Physics 142, 114305 (2015)

 

 

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