Jörg Zegenhagen

profilephoto

Jörg Zegenhagen joined Diamond as Experimental Coordinator in September 2013 following 14 years at the ESRF, France.

Email: jorg.zegenhagen@diamond.ac.uk
Tel: +44 (0) 1235 778381

Key Research Area

Key Research Areas

  • Surfaces and interfaces
  • Electrochemical, structure and electronic properties
  • X-ray scattering
  • X-ray standing waves
  • Photoelectron spectroscopy
  1. Research Expertise
  2. Publications
Research Expertise -

Current Research Interests

Surface science was for long associated with ultra high vacuum and artificial surfaces and thus considered purely academic. Helped by synchrotron radiation X-ray techniques, surface/interface science has nowadays entered the real world addressing problems ranging from fundamental to applied science. Microelectronics, catalysis, solar energy conversion, batteries, fuel cells, corrosion, all are governed by hidden interfacial properties which can be uncovered with powerful, penetrating x-ray beams. New phenomena and new properties are discovered at the interface of different materials or when the dimensionality is reduced: Oxide interfaces are becoming conducting, electron transport is being quantised, or catalytic properties are being enhanced.

Since several years I am increasingly interested in investigating transition metal oxide materials/surfaces for solar energy harvesting and fuel production. Furthermore, in widening the research portfolio for such investigations, I am exploring ways for extending the analytical power of photoelectron spectroscopy to the investigation of solid electrolyte interfaces, key players in the quest of producing fuel from sunlight and water. More than 95% of the worldwide energy production is based on non replenishable resources, meaning that we are cutting off the branch we are sitting on. Fossil resources, produced over 100s of millions of years are much too valuable for simply burning (going on since more than hundred years). Whether in ten or twenty or fifty years, these resources will be depleted. With fusion technology still far in the future and associated with unexplored risks, solar energy is the only viable alternative to safely satisfy the future energy need of mankind.

Oxide materials are increasingly attracting interest of researchers and engineers since the discovery of high temperature superconductivity in cuprous oxides in 1986. I am interested in these fascinating materials, in particular SrTiO3, from a fundamental point of view. Structurally rather simple, this insulating cubic perovskite continues to surprise the scientific community with a host of astonishing findings. Lately its surface/interface was found exhibiting conductivity and other unexpected electronic properties when epitaxially covered with other oxide insulators.

As one of the three scientific coordinators I am working together with the physical science director of research, e.g. leading of new initiatives in instrumentation development in Physical Sciences, coordinating of beamline design, construction and operational upgrades in Physical Sciences, assistance in coordination of the science programme within Physical Sciences. Furthermore, as detailed above, I am pursuing my own research programme working together with DLS beamline staff, PhD students and several groups from Europe and abroad.

Publications - +

Recent Publications

Interface reconstruction in superconducting CaCuO2/SrTiO3 superlattices: A hard x-ray photoelectron spectroscopy study; Carmela Aruta, Christoph Schlueter, Tien-Lin Lee, Daniele Di Castro, Davide Innocenti, Antonello Tebano, Jorg Zegenhagen and Giuseppe Balestrino, Phys. Rev. B 87, 155145 (2013).

Exploring the Bonding of Large Hydrocarbons on Noble Metals: Diindoperylene on Cu(111), Ag(111), and Au(111); C. Bürker, N. Ferri, A. Tkatchenko, A. Gerlach, J. Niederhausen, T. Hosokai, S. Duhm, J. Zegenhagen, N. Koch, M. Scheffler, and F. Schreiber; Phys. Rev. B. 87, 165443 (2013).

Tuning the structure of ultrathin BaTiO3 films on Me(001) (Me=Fe, Pd, Pt); H. L. Meyerheim, A. Ernst, K. Mohseni, I. V. Maznichenko, J. Henk, S. Ostanin, N. Jedrecy, F. Klimenta, J. Zegenhagen, C. Schlueter, I. Mertig, and J. Kirschner; Phys. Rev. Lett. 111, 105501 (2013).

Structure of the TiO2(110) interface with water; Geoff Thornton, Tom Woolcot, Hassan Hussain; 245th National Meeting of the American-Chemical-Society (ACS), New Orleans, 2013; ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY Volume 245, Abstract: 23-COLL, APR 7 (2013).

Chemically Resolved Interface Structure of Epitaxial Graphene on SiC(0001); Jonathan D. Emery, Blanka Detlefs, Hunter J. Karmel, Luke O. Nyakiti, D. Kurt Gaskill, Mark C. Hersam, Jӧrg Zegenhagen, and Michael J. Bedzyk; Phys. Rev. Lett 111, 215501 (2013).

In Situ Surface X-Ray Diffraction Studies of the Influence of the PEG-Cl-Complex on Homoepitaxial Electrodeposition on Cu(001); F. Golks, Y. Gründer, A. Drünkler, J. Roy, J. Stettner, J. Zegenhagen, and O. M. Magnussen; J. Electrochem. Soc. 160, D3165 (2013).

Cu(111) in chloride containing acidic electrolytes: Coadsorption of an oxygenated species; Y. Gründer, A. Drünkler, F. Golks, G. Wijts, J. Stettner, J. Zegenhagen, O. M. Magnussen; Journal of Electroanalytical Chemistry 712C, 74 (2014).

Dealloying of CuxAu studied by hard x-ray photoelectron spectroscopy; Parasmani Rajput, Ajay Gupta, Blanka Detlefs, Dieter M. Kolb, Satish Potdar, and Jӧrg Zegenhagen; Journal of Electron Spectroscopy and Related Phenomena 190,289 (2013).

In operando GISAXS studies of mound coarsening in electrochemical homoepitaxy; Martin Ruge, Frederik Golks, Jӧrg Zegenhagen, Olaf M. Magnussen, and Jochim Stettner; Phys. Rev. Lett. 112, 055503 (2014).

Probing deeper by hard x-ray photoelectron spectroscopy; P. Risterucci, O. Renault, E. Martinez, B. Detlefs, V. Delaye, J. Zegenhagen, C. Gaumer, G. Grenet and S. Tougaard, Appl. Phys. Lett. 104, 051608 (2014).