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Stefan
Vajda
Chemist, Cluster Studies Group
Chemistry Division
Bldg. 200, Room A129
Argonne National Laboratory
9700 South Cass Avenue
Argonne, IL 60439
Phone: 630-252-8123; Fax: 630-252-4954
E-mail: vajda@anl.gov
Education
M.Sc. (Physical Chemistry, 1985), Ph.D. (Chemistry, 1990),
Charles
University Prague, Czechoslovakia (Research advisor Prof. Vlastimil
Fidler, now joint appointment at Brown University, Providence, USA)
Dr. Habil. (Experimental Physics, 2003), Freie Universität Berlin,
Germany (Group of Prof. Ludger Wöste)
Professional
Background
1989-1991 Research Assistant,
Charles University Prague,
Department
of Physical Chemistry
1991-1992 Postdoctoral
Fellow, The University of Chicago,
Department
of Chemistry (Prof. G.R. Fleming)
1992-1995 Researcher, Charles University
Prague, Departments
of
Physical Chemistry & Chemical Physics
1995-2000 Researcher, subgroup and
project leader, Freie
Universität
Berlin, Institut für Experimentalphysik
2000-2002 University Assistant
(C1), subgroup and project leader,
Freie
Universität Berlin, Germany
2002-present Chemist, Argonne National Laboratory,
Chemistry
Division,
Argonne, Illinois, USA
Teaching
Experience
1985-1994 Photochemistry
and General Physical Laboratory Courses,
Charles
University Prague
1995-2000 Courses and seminars on
Atomic and Molecular Physics
I
& II, Physics Laboratory Courses, Freie Universität Berlin
1985- Supervisor
and cosupervisor of undergraduate, graduate
students
and postdoctoral employees
Research
Stays
1990 Universität
Göttingen, Institut für Physikalische Chemie,
Germany
1994 Freie
Universität Berlin, Institut für Experimentalphysik,
Germany
Honors
and Awards
1990 Fulbright/USIA
grant for postdoctoral research stay in the
group
of Prof. Graham R. Fleming, The University of
Chicago,
Department of Chemistry
Memberships
American Chemical Society, American Physical Society, American
Association for the Advancement of Science, Catalysis Club of Chicago
Professional
Activities
– Reviewer of research proposals: DOE, NSF, DFG (German
Research
Foundation)
– Reviewer of scientific articles: Applied Physics Letters, Catalysis
Letters, Collection of Czechoslovak Chemical Communications,
Encyclopedia of Mass Spectroscopy (Elsevier, Oxford),
European
Physics Journal AP, European Physics Journal D, Journal
of Applied
Physics, Journal of Chemical Physics, Spectrochimica
Acta, Science
– Invited to join the Advisory Board of The Dekker Encyclopedia of
Nanoscience and Nanotechnology, Marcel Dekker, Inc,
New York
– Coorganizer, International Workshop on "Analysis and Control of
Ultrafast Photoinduced Reactions", Berlin, Germany,
2001
– Session Chairman, International Workshop on "Quantum Dynamical
Concepts: From Diatomics to Biomolecules", Dresden,
Germany,
2002
– Member of the Committees for Diploma (M.Sc.) and Ph.D. Theses
and Thesis Opponent, Charles University Prague 1990-1995,
and
Freie Universität Berlin 1995-2002
Publications
Articles in books and journals: 55, Talks presented: around
60
Current
Research Interests
Physical and chemical properties of supported size-selected
metal
clusters and cluster-based nanomaterials; Synchrotron X-ray studies
of the thermal stability and kinetics of nanoparticle growth; Surface
composition and morphology effects on nanoparticle properties;
Controlled assembly; Optical properties; Nanocatalysis.
Other
Areas of Research Expertise
Chemistry of size-selected clusters in the gas phase; Femtosecond
vibrational and fragmentation dynamics in clusters and molecules;
Coherent control of laser-induced processes; Ultrafast time-resolved
spectroscopy on solvated molecular systems (conformational changes
in macromolecules, micellization, solvation dynamics, ionic sphere
relaxation, energy transfer, substrate binding to enzymes).
Communication
Skills
Czech, English, German, Hungarian, Russian
(poor), Slovak
Selected
publications from main areas of
current and previous research
Supported clusters and cluster-based nanomaterials:
"In Situ GISAXS Studies of the Thermal Stability nad Temperature
Induced Growth of Supported Cluster-Based Platinum and Gold
Nanoparticles", S. Vajda, R.E. Winans, J.W. Elam, B. Lee, M.J. Pellin,
S.J. Riley, S. Seifert, G.Y. Tikhonov and N. A. Tomczyk, Am. Chem.
Soc., Div. Fuel Chem. 2005, 50(1), pp.190-191 (invited paper)
"Thermal Stability of Supported Platinum Clusters Studied by In Situ
GISAXS", R. E. Winans, S. Vajda, B. Lee, S. J. Riley, S. Seifert,
G.Y. Tikhonov, and N. Tomczyk, J. Phys. Chem. B 108, 18105
(2004)
Chemistry of free size-selected clusters:
" Strongly Cluster Size Dependent Reaction Behavior of CO with O2
on Free Silver Cluster Anions", L. D. Socaciu, J. Hagen, J. Le Roux,
D. Popolan, T. M. Bernhardt, L. Wöste, and S. Vajda, J. Chem Phys.
120, 2078 (2004)
"Reactions of Size-Selected Metal Cluster Ions", S. Vajda, T. Leisner,
S. Wolf, L. Wöste, Phil. Mag. B 79, 1353 (1999)
Ultrafast laser studies of molecular processes in the gas phase:
"Observation and Theoretical Description of the Periodic Geometric
Rearrangement in Electronically Excited Non-Stochiometric Sodium-
Fluoride Clusters", S. Vajda, C. Lupulescu, A. Merli, F. Budzyn,
L. Wöste, M. Hartmann, J. Pittner, and V. Bonacic-Koutecký, Phys.
Rev. Lett. 89, 213404-1 (2002)
"The Relaxation from Linear to Triangular Ag3 Probed by Femtosecond
Resonant Two-Photon Ionization", T. Leisner, S. Vajda, S. Wolf , L.
Wöste, and R.S. Berry, J. Chem. Phys. 111, 1017 (1999)
Coherent control:
"Probing and Controlling Molecular Dynamics with Tailor-Made
Femtosecond Pulses", S. Vajda, and L. Wöste in The Dekker
Encyclopedia of Nanoscience and Nanotechnology, Editors:
J. A. Schwartz, C. Cotescu,and K. Putyera, Marcel Dekker, Inc.,
New York, invited review article, submitted (2005)
"Deciphering the Reaction Dynamics Underlying Optimal Control
Laser Fields", C. Daniel, J. Full, L. González*, C. Lupulescu, J.
Manz, A. Merli, S. Vajda*, and L. Wöste, Science 299, 536
(2003)
Ultrafast molecular dynamics in the liquid phase:
"Femtosecond through Nanosecond Time Scale Solvation Dynamics
in Pure Water and Inside the g-Cyclodextrin
Cavity", S. Vajda,
R. Jimenez, E.W. Castner, Jr., S.J. Rosenthal, V. Fidler, and G.R.
Fleming, J. Chem. Soc. Faraday Transactions 91, 867 (1995)
"Nanosecond Fluorescence of Tryptophans in Cytochrome
P450SCC (CYP 11 A1): Effect of Substrate Binding", P. Anzenbacher,
J. Hudecek, S. Vajda, V. Fidler, C. Laroque, and R. Lange, Biochem.
Biophys. Res. Commun. 181, 1493 (1991)
"Time-Resolved Fluorescence Study of Chain Dynamics. I.
Poly(Methacrylic Acid) in Dilute Water Solutions", B. Bednar,
S. Vajda, V. Fidler, J. Trnena, P. Svoboda, and K. Prochazka,
Macromolecules 24, 2054 (1991)
"Time-Resolved Fluorescence Study of Micellizing Block Copolymers",
K. Prochazka, S. Vajda, V. Fidler, B. Bednar, E. Mukhtar, M. Almgren,
and A.S. Holmes, J. Mol. Struct. 219, 377 (1990)
Complete
List of Publications
Go to Cluster Studies Group
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