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Research focus:

Lehrstuhl für Physikalische Chemie II Am Hubland, 97074/Würzburg Mail: wolfgang.kiefer@mail.uni-wuerzburg.de Url: http://www.uni-wuerzburg.de/kiefer/welcome.html

Scientific members:

   Professors:

• Prof. Dr. Wolfgang Kiefer ,Tel: 0931/8886330

   Outside lecturer:

• PD Dr. Jürgen Popp

   Scientific assistants:

• Dr. Erika Vogel
• Dr. Petra Rösch
• Dr. E. J. Liang
• Dr. Y. Yang
• Dr. Damien Moigno
• Dipl. Phys. Monica Bolboaca
• Dipl. Phys. N. Leopold
• Dipl. Chem. Ralph Geßner
• Dipl. Chem. Petra Meuer
• Dipl. Phys. Ioana Pavel

   Other participating persons and organisations:

• Dr. S. Cinta , Physics Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Dr. M. Venter , Chemistry Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Prof. Dr. T. Iliescu , Physics Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Prof. Dr. O. Cozar , Physics Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Dr. I. Haiduc , Chemistry Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Prof. Dr. M. H.B. Hayes , School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
• Prof. Dr. Roger Thull , Abteilung experimentelle Zahnmedizin, Universität Würzburg
• Dr. D. Maniu , Physics Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Dr. A. Deak , Chemistry Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Dr. F. D. Irimie , Chemistry Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Dr. Cs. Paisz , Chemistry Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Dr. R. Pacurariu , Physics Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Dr. M. Ristoiu , Physics Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Dr. G. Damian , Physics Department, Babes-Bolyai University, Cluj-Napoca, Romania
• Prof. Dr. B. Lendl , Institut für Chemische Technologie und Analytik, Technische Universität Wien

Research foci (and basic equipment-based research projects):
The Raman scattering intensity of many molecules adsorbed on roughened metal surfaces (e.g. Ag, Au, Cu) is very often enhanced by orders of magnitude. The underlying effect (SERS = surface enhanced Raman scattering) is particular ascribed to an electromagnetic field enhancement in the vincnity of the metall surface which can be related to a resonance excitation of surface plasmons in these metal particles. On the basis of the specific selection rules for the SERS process predictions about the bonding situation, geometry and orientation of the surface-species can be made. The presence of the metal particles very often leads to a quenching of fluorescence which can be observed for many organic and biological substances. The interaction of several organic and inorganic molecules e.g. miscellaneous natural products (amino acids, dyes, vitamines) or environmental moelcules (Humin or Fulvin acid) with the metal surfaces has been investigated by means of SERS spectroscopy. The SERS effect has also been used to characterize new materials or coatings as well as for structural investigations of biological substances.

Results:
For the results in this research area, please consult the above-mentioned publications.

Rewards and prizes:
Prof. Dr. W. Kiefer: Honorary Fellow of the Laser and Spectroscopy Society of India (F.L.S.S.), 1999. - Distinguished Service Award of the Society of Applied Spectroscopy, 2000. - Foreign Councillor of the Institute for Molecular Science, Okazaki National Research Institutes, Okazaki, Japan, 1999-2001. - Technical Expert Monitor of the International Science and Technology Center, Moscow, Russia, 1999-2002. - Chief Editor of the: Journal of Raman Spectroscopy, 2000.-- PD Dr. J. Popp: Zehetmaier Award (postdoctoral lecture qualification scholarship) awarded by the Freistaat Bayern, 1999. - Cooperation Prize of the University of Würzburg, 2001, - Bunsen-Kirchhoff Prize awarded by the German Bunsen-Society, 2002. -- Dr. D. Moigno: Faculty Award (Dissertation) of the Faculty of Chemistry and Pharmacy, 2002.

Equipment:
Micro Raman set up incl. confocal pinhole (LabRam JobinYvon): HeNe-Laser, 785 diode laser, Ar ion laser (514 nm) and cw Nd:YAG laser / accessories; VIS Raman spectrometer incl. microscope: Ar ion laser / XY triple monochromator (DILOR) / OMA detector; VIS Raman spectrometer incl. microscope: Kr ion laser + Ar ion laser / Spex 1404 double monochromator / CCD camera; UV/VIS Raman spectrometer incl. microscope: Ar ion laser (275, 300, 305, 333, 351, 363, 454, 457, 466, 473, 476, 488, 496 and 514 nm) / Spex 1404 double monochromator / CCD camera; NIR Raman spectrometer: cw Nd:YAG laser / Jarrell Ash spectrometer / InGaAs detector / lock in amplifier; FT-IR spectrometer incl. FT-Raman module (Bruker): Nd:YAG laser / Ge detector / accessories.