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SERGEI TRETIAK

Career Highlights

Dr. Tretiak graduated with honors from the Moscow Institute of Physics and Technology (1994). He was awarded a Graduate Student Award in Computational Chemistry (1996) and thereafter recieved several distinguished fellowships: Elon Huntington Hooker and Sherman Clarke Fellowships (1996-97), Arnold Weissberger Fellowship (1997-98), Director’s Post-Doctoral Fellowship (1999-01), and Slansky Fellowship (2001). Dr. Tretiak has (co-) authored more than sixty review and research articles and presented more than thirty plenary and invited talks at international and national meetings, including meetings of the American Physical Society, the Materials Research Society, and the American Chemical Society.

Research Areas

Dr. Tretiak investigates the relation between optical and chemical properties of organic and semiconductor materials; development of modern computational methods for molecular optical properties; Time-Dependent Density Functional Theory; Molecular dynamics of the excited states; Collective electronic excitations and optical response of confined excitons in conjugated polymers, semiconductor nanoparticles, and molecular aggregates; Charge and energy transfer in biological and artificial antenna complexes; Ultrafast nonlinear spectroscopy; and Nonlinear dynamics of complex classical and quantum systems.

Selected Publications

• E.A. Badaeva, T.V. Timofeeva, A.M. Masunov, S. Tretiak, "Role of donor-acceptor strengths and separation on the two-photon absorption response of cytotoxic dyes: A TD-DFT study," Journal of Physical Chemistry A 109 (32): 7276-7284 (2005)
• A. Masunov, S. Tretiak, J.W. Hong, B. Liu, G.C. Bazan, "Theoretical study of the effects of solvent environment on photophysical properties and electronic structure of paracyclophane chromophores," Journal of Chemical Physics 122 (22): 224505 (2005)
• C. Katan, F. Terenziani, O. Mongin, M.H.V. Werts, L. Porres, T. Pons, J. Mertz, S. Tretiak, and M. Blanchard-Desce, "Effects of (multi)branching of dipolar chromophores on photophysical properties and two-photon absorption," Journal of Physical Chemistry A 109 (13): 3024-3037 (2005)
• S. Tretiak, K. Igumenshchev, V. Chernyak, "Exciton sizes of conducting polymers predicted by time-dependent density functional theory," Physical Review B 71 (3): 033201 (2005)
• R.J. Magyar, S. Tretiak, Y. Gao, et. al., "A joint theoretical and experimental study of phenylene-acetylene molecular wires," Chemical Physics Letters 401 (1-3): 149-156 (2005)
• S. Tretiak, A. Piryatinski, A. Saxena A, et. al., "On the existence of photoexcited breathers in conducting polymers," Physical Review B 70 (23): 233203 (2004)
• A. Piryatinski, S. Tretiak, P.W. Fenimore, et. al., "Three-pulse photon-echo spectroscopy as a probe of the photoexcited electronic state manifold in coupled electron-phonon system," Physical Review B 70 (16): 161404 (2004)
• I. Franco and S. Tretiak, “Electron-vibrational Dynamics of Photoexcited Polyfluorenes,” Journal of the American Chemical Society 126, 12130 (2004)
• S. Tretiak, R.L. Martin, A. Saxena, A.R. Bishop, “Photoexcited Breathers in Conjugated Polyenes: An Excited State Molecular Dynamics Study”, Proceedings of the National Academy of Sciences. USA 100, 2185 (2003)
• S.A. Crooker, J. Hollingsworth, S. Tretiak, and V.I. Klimov, “Spectrally Resolved Dynamics of Energy Transfer in Quantum-dot Assemblies: Engineered Energy Flows in Artificial Materials,” Physical Review Letters, 89, 6802 (2002)

Professional Appointments

2001-Present		Technical staff member in the Theoretical Division Los Alamos National Laboratory (LANL), Los Alamos, NM
1999-2001		Director’s Postdoctoral Fellow (LANL)

Professional Preparation

University of Rochester		Chemistry		Ph.D. 1998
University of Rochester		Chemistry		M.S. 1996
Institute of Spectroscopy, Russian Academy of Sciences		Physics		M.S. 1994
Moscow institute of Physics and Technology		Physics		B.S. 1992