Hi everybody,
Here are two seminars today which may be of interest to people:
1) Barry Masters (MIT): Resonance energy transfer theories: from experiments
to classical theory to quantum mechanical theories
Noon
Grier Room, MIT Bldg 34-401
Resonance energy transfer is a powerful technique to measure distances and
structural changes in the nanometer scale. The plethora of applications of
this technique to chemistry, biology and medicine is a metric of the impact
of this optical technique. Scientists often use the textbook formulations of
the rate equations; however, sometimes without a critical understanding of
the inherent assumptions and limitations of the theory, to derive
quantitative conclusions. Where did these mathematical formulations of
resonance energy transfer come from? What experiments indicated the
existence of the phenomena? This talk provides insights into the theoretical
developments and the experiments of all the scientists who came before
Theodor Förster. I have reviewed the French and German papers that described
the physics of energy transfer. The theorists and the experimentalists
include: the Perrins (father and son), Heisenberg (1926-his paper on energy
transfer between two harmonic oscillators), Kallmann and London, Förster's
Classical theory of Resonance Energy Transfer (1946), Förster Quantum Theory
of resonance Energy Transfer (1948), Oppenheimer and Arnold (1950), and Hans
Kuhn. I describe the physical aspects of these theories, the approximations
used (dipole-dipole interactions; vibronic interactions etc) and the
mathematics of their theories. Finally, how were each of these theories
validated (or not) by experimental results. What are the limitations of each
theory and when are they inappropriately used?
Refreshments served after the lecture
3) Prof Hans-Joachim Freund (MPI): Thin oxide films: charge transfer and
catalysis!
8:00 p.m.
Pfizer Lecture Hall, Harvard Chemistry
Best
Johannes
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Dr. Johannes Hachmann
Postdoctoral Fellow
Aspuru-Guzik Research Group
Harvard University
Department of Chemistry and Chemical Biology
12 Oxford St, Rm M104A
Cambridge, MA 02138
USA
eMail: jh(a)chemistry.harvard.edu
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