Foto Ioannis Zegkinoglou

Science, Energy and Building Services Prof. Dr. rer. nat. Ioannis Zegkinoglou


Esslingen City Centre Campus
Room: S 04.304
Kanalstraße 33
73728 Esslingen

+49 711 397-3414


Founding Director

Head of Scanning Electron Microscopy (SEM) Laboratory


2022:                  Professor, Experimental Physics | Faculty of Science, Energy and Building Services,  Esslingen University of Applied Sciences

2020:                  Senior Lecturer (Privatdozent), Experimental Physics | Faculty of Physics and Astronomy,  Ruhr University Bochum

2015-2019:         Habilitation | Faculty of Physics and Astronomy, Ruhr University Bochum

2011-2014:         Research Associate | Lawrence Berkeley National Laboratory, Berkeley, CA (USA)

2011-2013:         Research Associate | Department of Physics, University of Wisconsin-Madison, Madison, WI (USA)

2007-2010:         Postdoctoral Researcher | Max Planck Institute for Solid State Research, Stuttgart 

2007:                   Doctoral degree, Dr. rer. nat. | Max Planck Institute for Solid State Research / University of Stuttgart

2002:                   Degree in Physics (Diploma) | Faculty of Physics, National and Kapodistrian University of Athens, Greece


ORCID ID:           0000-0002-1101-6935

ResearcherID:    H-2343-2013


  1. I. Zegkinoglou, Surface and Interface Science of Energy Conversion Materials: Novel Insights with X-ray Spectroscopy, Habilitation thesis, Ruhr University Bochum (2019).
  2. I. Zegkinoglou, Resonant and High-Energy X-Ray Scattering Studies on Strongly Correlated Electron Systems in Transition Metal Oxides, Ph.D. Dissertation, Max-Planck Institute for Solid State Research / University of Stuttgart (2006).
  3. I. Zegkinoglou, Broadband AC Dielectric Relaxation Spectroscopy and Hydration Properties of Segmented Polyurethanes, Diploma thesis, National and Kapodistrias University of Athens (2002).

Book Contributions

  1. I. Zegkinoglou and B. Keimer, X-Ray Scattering Studies of 4d- and 5d-Electron Transition Metal Oxides, Chapter in: Frontiers of 4d- and 5d-Transition Metal Oxides, edited by G. Cao and L. E. De Long, World Scientific Press, ISBN: 978-981-4374-859 (2013).

Peer-Reviewed Journal Articles

  1. U. Hejral, J. Timoshenko, D. Kordus, M. Luna Lopez, N. Jimenez Divins, S. Widrinna, I. Zegkinoglou, L. Pielsticker, H. Mistry, J. A. Boscoboinik, S. Kühl, B. Roldan Cuenya, Tracking the Phase Changes in Micelle-Based NiGa Nanocatalysts for Methanol Synthesis under Activation and Working Conditions, J. Catal. 405, 183 (2022).
  2. L. Pielsticker, I. Zegkinoglou, Z.-K. Han, J. J. Navarro, S. Kunze, O. Karslıoğlu, S. V. Levchenko, B. Roldan Cuenya, Crystallographic Orientation Dependence of Surface Segregation and Alloying on PdCu Catalysts for CO2 Hydrogenation, J. Phys. Chem. Lett. 12, 2570 (2021).
  3. N. J. Divins, D. Kordus, J. Timoshenko, I. Sinev, I. Zegkinoglou, A. Bergmann, S. W. Chee, S. Widrinna, O. Karslioglu, H. Mistry, M. Lopez Luna, J. Q. Zhong, A. S. Hoffman, A. Boubnov, J. A. Boscoboinik, M. Heggen, R. E. Dunin-Borkowski, S. R. Bare, B. Roldan Cuenya, Operando High-Pressure Investigation of Size-Controlled CuZn Catalysts for the Methanol Synthesis Reaction,        Nat. Commun. 12, 1435 (2021).
  4. A. A. Cordones, C. D. Pemmaraju, J. H. Lee, I. Zegkinoglou, M.-E. Ragoussi, F. J. Himpsel, G. de la Torre, R. W. Schoenlein, Excited-State Charge Distribution of a Donor−π−Acceptor Zn Porphyrin Probed by N K‑Edge Transient Absorption Spectroscopy, J. Phys. Chem. Lett. 12, 1182 (2021).
  5. S. Kunze, P. Grosse, M. Bernal Lopez, I. Sinev, I. Zegkinoglou, H. Mistry, J. Timoshenko, M. Y. Hu, J. Zhao, E. E. Alp, S. W. Chee, B. Roldan Cuenya, Operando NRIXS and XAFS Investigation of Segregation Phenomena in Fe-Cu and Fe-Ag Nanoparticle Catalysts during CO2 Electroreduction, Angew. Chem.Int. Ed. 59, 22667 (2020).
  6. F. Dionigi, Z. Zeng, I. Sinev, T. Merzdorf, S. Deshpande, M. Bernal Lopez, S. Kunze, I. Zegkinoglou, H. Sarodnik, D. Fan, A. Bergmann, J. Drnec, J. Ferreira de Araujo, M. Gliech, D. Teschner, J. Zhu, W.-X. Li, J. Greeley, B. Roldan Cuenya, P. Strasser, In-situ Structure and Catalytic Mechanism of NiFe and CoFe Layered Double Hydroxides during Oxygen Evolution, Nat. Commun. 11, 2522 (2020).
  7. S. Anke, T. Falk, G. Bendt, I. Sinev, M. Hävecker, H. Antoni, I. Zegkinoglou, H. Jeon, A. Knop-Gericke, R. Schlögl, B. Roldan Cuenya, S. Schulz, M. Muhler, On the reversible deactivation of cobalt ferrite spinel nanoparticles applied in selective 2-propanol oxidation, J. Catal. 382, 57 (2020).
  8. S. Anke, G. Bendt, I. Sinev, H. Hajiyani, H. Antoni, I. Zegkinoglou, H. Jeon, R. Pentcheva, B. Roldan Cuenya, S. Schulz, M. Muhler, Selective 2-Propanol Oxidation over Unsupported Co3O4 Spinel Nanoparticles: Mechanistic Insights into Aerobic Oxidation of Alcohols, ACS Catal. 9, 5974 (2019).
  9. I. Zegkinoglou, L. Pielsticker, Z.-K. Han, N. J. Divins, D. Kordus, Y.-T. Chen, C. Escudero, V. Pérez-Dieste, B. Zhu, Y. Gao, B. Roldan Cuenya, Surface Segregation in CuNi Nanoparticle Catalysts during CO2 Hydrogenation: the Role of CO in the Reactant Mixture, J. Phys. Chem. C 123 (13), 8421 (2019).
  10. L. Madauß*, I. Zegkinoglou*, H. Vázquez Muiños, Y.-W. Choi, S. Kunze, M.-Q. Zhao, C. H. Naylor, P. Ernst, E. Pollmann, O. Ochedowski, H. Lebius, A. Benyagoub, B. Ban d-Etat, A. T. C. Johnson, F. Djurabekova, B. Roldan Cuenya, M. Schleberger, Highly active single-layer MoS2 catalyst synthesized by swift heavy ion irradiation, Nanoscale 10, 22908 (2018). (* equal contributions)
  11. H. S. Jeon, I. Sinev, F. Scholten, N. J. Divins, I. Zegkinoglou, L. Pielsticker, B. Roldan Cuenya, Operando Evolution of the Structure and Oxidation State of Size-Controlled Zn Nanoparticles during CO2 Electroreduction, J. Am. Chem. Soc. 140, 9383 (2018).
  12. O. Karslioglu, L. Trotochaud, I. Zegkinoglou, H. Bluhm, X-Ray Spectroscopic Characterization of BaO, Ba(OH)2, BaCO3, and Ba(NO3)2, J. Electron Spectrosc. Relat. Phenom. 225, 55 (2018).
  13. L. Pielsticker, I. Zegkinoglou, N. J. Divins, H. Mistry, Y.-T. Chen, A. Kostka, J. A. Boscoboinik, B. Roldan Cuenya, Segregation phenomena in size-selected bimetallic CuNi nanoparticle catalysts,         J. Phys. Chem. B 122, 919 (2018).
  14. I. Zegkinoglou, A. Zendegani, I. Sinev, S. Kunze, H. Mistry, H. S. Jeon, J. Zhao, M. Hu, E. E. Alp, S. Piontek, M. Smialkowski, U.-P. Apfel, F. Körmann, J. Neugebauer, T. Hickel, B. Roldan Cuenya, Operando phonon studies of the protonation mechanism in highly active hydrogen evolution reaction pentlandite catalysts, J. Am. Chem. Soc. 139, 14360 (2017).
  15. A. Shavorskiy, X. Ye, O. Karslıoğlu, A. Poletayev, M.  Hartl, I. Zegkinoglou, L. Trotochaud, S. Nemsak, C. Schneider, E. Crumlin, S. Axnanda, Z. Liu, P. Ross, W. Chueh, H. Bluhm, Direct Mapping of Band Positions in Doped and Undoped Hematite During Photoelectrochemical Water Splitting,       J. Phys. Chem. Lett. 8, 5579 (2017).
  16. H. Mistry, Y. Choi, A. Bagger, F. Scholten, C. Bonifacio, I. Sinev, N. J. Divins, I. Zegkinoglou, H. Jeon, K. Kisslinger, E. A. Stach, J. C. Yang, J. Rossmeisl, B. Roldan Cuenya, Enhanced carbon dioxide electroreduction to carbon monoxide over defect rich plasma-activated silver catalysts, Angew. Chem. 56, 11394 (2017).
  17. D. Gao*, I. Zegkinoglou*, N. J. Divins, F. Scholten, I. Sinev, P. Grosse, B. Roldan Cuenya, Plasma-Activated Copper Nanocube Catalysts for Efficient Carbon Dioxide Electroreduction to Hydrocarbons and Alcohols, ACS Nano 11, 4825 (2017). (* equal contributions)
  18. H. Mistry, A. Varela, C.S. Bonifacio, I. Zegkinoglou, I. Sinev, Y.-W. Choi, K. Kisslinger, E. A. Stach, J.C. Yang, P. Strasser, B. Roldan Cuenya, Highly selective plasma-activated copper catalysts for carbon dioxide reduction to ethylene, Nat. Commun. 7, 12123 (2016).
  19. Y. Choi, I. Sinev, H. Mistry, I. Zegkinoglou, B. Roldan Cuenya, Probing the Dynamic Structure and Chemical State of Au Nanocatalysts during the Electrochemical Oxidation of 2-Propanol, ACS Catal. 6, 3396 (2016).
  20. O. Karslioglu, S. Nemsak, I. Zegkinoglou, A. Shavorskiy, M. Hartl, F. Salmassi, E. M. Gullikson, M. L. Ng, C. Rameshan, B. Rude, D. Bianculli, A. A. Cordones, S. Axnanda, E. J. Crumlin, P. N. Ross, C. M. Schneider, Z. Hussain, Z. Liu, C. S. Fladley, H. Bluhm, Aqueous solution/metal interfaces investigated in operando by photoelectron spectroscopy, Faraday Discuss. 180, 35 (2015).
  21. S. Nemŝák, A. Shavorskiy, O. Karslioglu, I. Zegkinoglou, A. Rattanachata, C. S. Conlon, P. K. Greene, K. Liu, F. Salmassi, E. M. Gullikson, S.-H. Yang, H. Bluhm, C. S. Fadley,  Concentration and chemical-state profiles at heterogeneous interfaces with sub-nm accuracy from standing-wave ambient-pressure photoemission, Nat. Commun. 5, 5441 (2014).
  22. M. Kapilashrami, G. Conti, I. Zegkinoglou, S. Nemŝák, C. S. Conlon, T. Törndahl, V. Fjällström, J. Lischner, S. G. Louie, R. J. Hamers, L. Zhang, J.-H. Guo, C. S. Fadley, F. J. Himpsel, Boron Doped Diamond Films as Electron Donors in Photovoltaics: an X-Ray Absorption and Hard X-Ray Photoemission Study,   J. Appl. Phys. 116, 143702 (2014).
  23. C. X. Kronawitter, I. Zegkinoglou, S.-H. Shen, P. Liao, I. S. Cho, O. Zandi, Y.-S. Liu, K. Lashgari, G. Westin, J.-H. Guo, F. J. Himpsel, E. A. Carter, X. L. Zheng, T. W. Hamann, B. E. Koel, S. S. Mao, L. Vayssieres, Titanium Incorporation into Hematite Photoelectrodes: Theoretical Considerations and Experimental Observations, Energy Environ. Sci. 7, 3100 (2014).
  24. S. Neppl, A. Shavorskiy, I. Zegkinoglou, M. Fraund, D. S. Slaughter, T. Troy, M. P. Ziemkiewicz, M. Ahmed, S. Gul, B. Rude, J. Z. Zhang, A. S. Tremsin, P.-A. Glans, Y.-S. Liu, C. H. Wu, J. Guo, M. Salmeron, H. Bluhm, O. Gessner, Capturing interfacial photoelectrochemical dynamics with picosecond time-resolved X-ray photoelectron spectroscopy, Faraday Discuss. 171, 219 (2014).
  25. A. Shavorskiy, S. Neppl, D. S. Slaughter, J. P. Cryan, K. R. Siefermann, F. Weise, M.-F. Lin, C. Bacellar, M. P. Ziemkiewicz, I. Zegkinoglou, M. W. Fraund, C. Khurmi, M. P. Hertlein, T. W. Wright, N. Huse, R. W. Schoenlein, T. Tyliszczak, G. Coslovich, J. Robinson, R. A. Kaindl, B. S. Rude, A. Ölsner, S. Mähl, H. Bluhm, O. Gessner, Sub-Nanosecond Time-Resolved Ambient-Pressure X-ray Photoelectron Spectroscopy Setup for Pulsed and Constant Wave X-ray Light Sources, Rev. Sci. Instrum. 85, 093102 (2014).
  26. M. Bakr, S. M. Souliou, S. Blanco-Canosa, I. Zegkinoglou, H. Gretarsson, J. Strempfer, T. Loew, C. T. Lin, R. Liang, D. A. Bonn, W. N. Hardy, B. Keimer, M. Le Tacon, Lattice dynamical signature of charge density wave formation in underdoped YBa2Cu3O6+x, Phys. Rev. B 88, 214517 (2013).
  27. I. Zegkinoglou, M.-E. Ragoussi, C. D. Pemmaraju, P. S. Johnson, D. F. Pickup, J. E. Ortega, D. Prendergast, G. de la Torre, F. J. Himpsel, Spectroscopy of Donor-p-Acceptor Porphyrins for Dye-Sensitized Solar Cells, J. Phys. Chem. C 117, 13357 (2013).
  28. C. X. Kronawitter, I. Zegkinoglou, S. Shen, J.-H. Guo, F. J. Himpsel, S. S. Mao, L. Vayssieres, On the Orbital Anisotropy in Hematite Nanorod-Based Photoanodes, Phys.Chem. Chem. Phys. 15, 13483 (2013).
  29. M. A. Hossain, I. Zegkinoglou, Y.-D. Chuang, J. Geck, B. Bohnenbuck, A. G. Cruz Gonzalez, H.-H. Wu, C. Schüßler-Langeheine, D. G. Hawthorn, J. D. Denlinger, R. Mathieu, Y. Tokura, S. Satow, H. Takagi, Y. Yoshida, Z. Hussain, B. Keimer, G. A. Sawatzky, A. Damascelli, Electronic superlattice revealed by resonant scattering from random impurities in Sr3Ru2O7, Sci. Rep. 3, 2299 (2013).
  30. P. S. Johnson, P. L. Cook, I. Zegkinoglou, J.-M. García-Lastra, A. Rubio, R. E. Ruther, R. J. Hamers, F. J. Himpsel, Electronic structure of Fe- vs. Ru-based dye molecules,J. Chem. Phys. 138, 044709 (2013).
  31. D. F. Pickup, I. Zegkinoglou, B. Ballesteros, C. R. Ganivet, J.-M. García-Lastra, P. L. Cook, P. S. Johnson, R. González-Moreno, C. Rogero, F. de Groot, A. Rubio, G. de la Torre, J. Enrique Ortega, F. J. Himpsel, Influence of Axial and Peripheral Ligands on the Electronic Structure of Titanium Phthalocyanines, J. Phys. Chem. C 117, 4410 (2013).
  32. F. J. Himpsel, P. L. Cook, G. de la Torre, J.-M. García-Lastra, R. González-Moreno, J.-H. Guo, R. J. Hamers, C. X. Kronawitter, P. S. Johnson, J. E. Ortega, D. Pickup, M.-E. Ragoussi, C. Rogero, A. Rubio, R. E. Ruther, L. Vayssieres, W. Yang, I. Zegkinoglou (authors in alphabetical order), Design of Solar Cell Materials via Soft X-ray Spectroscopy, J. Electron Spectrosc. Relat. Phenom. 190, 2 (2013).
  33. C. X. Kronawitter, I. Zegkinoglou, C. Rogero, J.-H. Guo, S. S. Mao, F. J. Himpsel, L. Vayssieres, On the Interfacial Elecronic Structure Origin of Efficiency Enhancement in Hematite Photoanodes, J. Phys. Chem. C 116, 22780 (2012).
  34. I. Zegkinoglou, P. L. Cook, P. S. Johnson, W. Yang, J. Guo, D. Pickup, R. González-Moreno, C. Rogero, R. E. Ruther, M. L. Rigsby, J. E. Ortega, R. J. Hamers, F. J. Himpsel, Electronic Structure of Diamond Surfaces Functionalized by Ru(tpy)2, J. Phys. Chem. C 116, 13877 (2012).
  35. R. González-Moreno, P. L. Cook, I. Zegkinoglou, X. Liu, P. S. Johnson, W. Yang, R. E. Ruther, R. J. Hamers, R. Tena-Zaera, F. J. Himpsel, J. E. Ortega, C. Rogero, Attachment of Protoporphyrin Dyes to Nanostructured ZnO Surfaces: Characterization by Near-Edge X-Ray Absorption Fine Spectroscopy, J. Phys. Chem. C 115, 18195 (2011).
  36. E. Benckiser, M. W. Haverkort, S. Brück, E. Goering, S. Macke, A. Frañó; X. Yang, O. K. Andersen, G. Cristiani, H.-U. Habermeier, A. V. Boris, I. Zegkinoglou, P. Wochner, H.-J. Kim, V. Hinkov, B. Keimer, Orbital reflectometry of oxide heterostructures, Nat. Mater. 10, 189 (2011).
  37. B. Bohnenbuck, I. Zegkinoglou, J. Strempfer, C. S. Nelson, H.-H. Wu, C. Schüßler-Langeheine, M. Reehuis, E. Schierle, Ph. Leininger, T. Herrmannsdörfer, J. C. Lang, G. Srajer, C. T. Lin, B.Keimer, Magnetic Structure of RuSr2GdCu2O8 Determined by Resonant X-Ray Diffraction, Phys. Rev. Lett. 102, 037205 (2009).
  38. B. Bohnenbuck, I. Zegkinoglou, J. Strempfer, C. Schüßler-Langeheine, C. S. Nelson, Ph. Leininger, H.-H. Wu, E. Schierle, J. C. Lang, G. Srajer, S. I. Ikeda, Y. Yoshida, K. Iwata, S. Katano, N. Kikugawa, B. Keimer, Magnetic structure and orbital state of Ca3Ru2O7 investigated by resonant x-ray diffraction, Phys. Rev. B 77, 224412 (2008).
  39. J. Strempfer, B. Bohnenbuck, I. Zegkinoglou, N. Aliouane, S. Landsgesell, M. v. Zimmermann, D. N. Argyriou, Magnetic-field-induced transitions in multiferroic TbMnO3 probed by resonant and nonresonant x-ray diffraction, Phys. Rev. B 78, 024429 (2008).
  40. N. N. Kovaleva, A. V. Boris, P. Yordanov, A. Maljuk, E. Brücher, J. Strempfer, M. Konuma, I. Zegkinoglou, C. Bernhard, A. M. Stoneham, B. Keimer, Optical response of ferromagnetic YTiO3 studied by spectral ellipsometry, Phys. Rev. B 76, 155125 (2008).
  41. D. N. Argyriou, N. Aliouane, J. Strempfer, I. Zegkinoglou, B. Bohnenbuck, K. Habicht, and M. v. Zimmermann, Melting of incommensurate-ferroelectric phase with magnetic field in multiferroic TbMnO3, Phys. Rev. B 75, 020101(R) (2007).
  42. N. Aliouane, D. N. Argyriou, J. Strempfer, I. Zegkinoglou, S. Landsgesell, M. v. Zimmermann, Field-induced linear magnetoelastic coupling in multiferroic TbMnO3, Phys. Rev. B 73, 020102(R) (2006).
  43. I. Zegkinoglou, J. Strempfer, C. S. Nelson, J. P. Hill, J. Chakhalian, C. Bernhard, J. C. Lang, G. Srajer, H. Fukazawa, S. Nakatsuji, Y. Maeno, B. Keimer, Orbital Ordering Transition in Ca2RuO4 Observed with Resonant X-Ray Diffraction, Phys. Rev. Lett. 95, 136401 (2005).
  44. J. Strempfer, I. Zegkinoglou, U. Rütt,M. v. Zimmermann, C. Bernhard, C. T. Lin, Th.Wolf, B. Keimer, Oxygen Superstructures Throughout the Phase Diagram of (Y, Ca)Ba2Cu3O6+x, Phys. Rev. Lett. 93, 157007 (2004).
  45. K. Raftopoulos, I. Zegkinoglou, A. Kanapitsas, S. Kripotou, I. Christakis, A. Vassilikou-Dova, P. Pissis, Y. Saveleyev, Dielectric and hydration propertied of segmental polyurethanes, e-Polymers No. 043 (2004) and Mat. Res. Innovat. 8, 134 (2004).

Proceedings and Reports

  1. F. J. Himpsel, P. L. Cook, I. Zegkinoglou, I. Boukahil, R. Qiao, W. Yang, S. C. Pemmaraju, D. Prendergast, C. X. Kronawitter, M. G. Kibria, Z. T. Mi, L. Vayssieres, Synchrotron-based spectroscopy for solar energy conversion, Proc. SPIE 9560, 95600G (2015).
  2. S. Neppl, Y.-S. Liu, C.-H. Wu, A. Shavorskiy, I. Zegkinoglou, T. Troy, D. S. Slaughter, M. Ahmed, A. S. Tremsin, J.-H. Guo, P.-A. Glans, M. Salmeron, H. Bluhm, O. Gessner, Toward Ultrafast In Situ X-ray Studies of Interfacial Photoelectrochemistry, Springer Proc. Phys. 162, 325 (2015).
  3. A. Shavorskiy, O. Karslioglu, I. Zegkinoglou, H. Bluhm, Synchrotron-based Ambient Pressure X-ray Photoelectron Spectroscopy, Synchr. Rad. News 27, 14 (2014).

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