Fritz-Haber-Institut der Max-Planck-Gesellschaft
DFG-Sonderforschungsbereich 555 "Komplexe Nichtlineare
Prozesse"
Fourth International Symposium
Engineering of Chemical Complexity
Berlin, June 7-9, 2006
Program and Organization: G. Ertl, A. S. Mikhailov, H. H. Rotermund
The aim of this meeting is to review current perspectives for design, manipulation and efficient control of self-organizing complex chemical systems, ranging from biotechnology and reactive nanostructures to macroscopic pattern formation in chemical reactors. Both experimental studies of such phenomena and their mathematical modeling will be discussed. Possible technological applications of self-organization phenomena shall be considered.
Invited Speakers
Download a printer-friendly version of the program (PDF, ca. 83kB).
16:00 – 20:00 Arrival and registration
8:45 Opening: G. Ertl
Session chair: P. De Kepper
9:00
R. Kapral
(Toronto, Canada)
Geometrical effects on spiral defect dynamics
[Abstract]
9:35
Y. Kuramoto
(Sapporo, Japan)
Noise-induced chemical turbulence
[Abstract]
10:10
J. L. Hudson
(Virginia University, USA)
Dynamical order and complexity in populations of electrochemical oscillators
[Abstract]
10:45 – 11:15 Coffee Break
Session chair: R. Kapral
11:15
I. R. Epstein
(Waltham, USA)
Localized structures in reaction-diffusion systems
[Abstract]
11:50
H. Kitahata
(Kyoto, Japan)
Spontaneous motion of a droplet driven by chemical potential or photon flux
[Abstract]
12:25 – 14:00 Lunch
Session chair: N. Jaeger
14:00
P. De Kepper
(Bordeaux, France)
The Landolt reaction: Stationary and oscillating fronts in an open spatial reactor with
conical geometry
14:35
A. De Wit
(Brussels, Belgium)
Hydrodynamic instability of autocatalytic reaction fronts
[Abstract]
15:10
O. Steinbock
(Tallahassee, USA)
Three-dimensional wave structures in excitable media
15:45 – 16:15 Coffee break
Session chair: M. Marek
16:15
K. Showalter
(Morgantown, USA)
Collective behavior in addressable excitable media
[Abstract]
16:50
H. Engel
(Berlin, Germany)
Feedback-controlled motion of a spiral wave core along a desired trajectory in an
excitable medium
[Abstract]
Session chair: K. Showalter
9:00
M. Bär
(Berlin, Germany)
Effective models and homogenization in reaction-diffusion processes: from tunable
pattern formation to realistic heart modeling
[Abstract]
9:35
U. Steiner
(Cambridge, UK)
Structure formation in organic-inorganic hybrid materials
10:10
Y. Yokoyama
(Tsukuba, Japan)
Morphology and dynamics of microscopic bubbles in liquid crystals
[Abstract]
10:45 – 11:15 Coffee Break
Session chair: Y. Kevrekidis
11:15
E. Bodenschatz
(Göttingen, Germany)
Spatially forced patterns and hexaroll chaos
[Abstract]
11:50
R. Ismagilov
(Chicago, USA)
Using microfluidics and modular mechanism to understand spatiotemporal dynamics
of complex reaction networks
[Abstract]
12:25 – 14:00 Lunch
Session chair: Y. Nishiura
14:00
Q. Tran-Cong
(Kyoto, Japan)
Reaction-induced hierarchical structures in multiphase polymer materials
14:35
F. Sagués
(Barcelona, Spain)
Langmuir monolayers: textures, flows and dynamic patterns
[Abstract]
15:10
M. Bonn
(Amsterdam, Netherlands)
Site-dependent surface reactivity investigated using nanostructured surfaces
Abstract:
In chemistry occurring on surfaces in e.g. catalysis, energy is transferred from the metal substrate
into adsorbed molecules, resulting in the excitation of specific vibrational modes, which, in turn,
can trigger chemical transformations. A full, molecular-scale understanding of surface chemistry
therefore contains two essential elements: knowledge of the coupling between the surface and the
different molecular modes within the system, and the coupling of these modes to different
reaction coordinates. A metal substrate supports two heat baths: electrons and phonons, whereas
an elementary diatomic adsorbate (such as carbonmonoxide, CO) supports four distinct
vibrational modes, which may differ in their propensity to accept energy from the substrate.
Ultrafast surface spectroscopy has provided important insights into energy flow pathways
between these different degrees of freedom, by exciting the surface with an ultrashort laser pulse
and monitoring, as a function of time, the subsequent excitation and reaction dynamics. One key
question that has remained unexplored, however, is how the chemical dynamics are affected by
surface defects, despite the well-established fact that defects, such as steps and missing atoms,
play an essential role in heterogeneous catalysis. The ultrafast dynamics of reactions occurring at
such sites can provide insights into important, and technologically relevant, elementary processes
on these sites.
Here, we elucidate the pathways and efficiency of energy flow between a stepped,
nanostructured Pt surface and the different modes of adsorbed CO, for CO adsorbed on different
surface sites: atomically flat regions and controlled ‘defect’ step sites. The dynamics occurring
after substrate excitation are monitored in two complementary ways: by probing ultrafast changes
in the internal C—O stretch vibration and by detecting ultrafast desorption events. Our results
reveal marked variations in adsorbate-substrate coupling and resulting reaction rates in
dependence of the precise adsorption site, although the different adsorption sites are separated by
only a few angstroms.
[close abstract]
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15:45 – 16:15 Coffee Break
Session chair: J. Hudson
16:15
R. Imbihl
(Hannover, Germany)
Pulses transporting potassium on a Rh(110) surface
16:50
D. Luss
(Houston, USA)
What causes temperature oscillations during CO oxidation in packed bed reactors
17:25
J. Lauterbach
(Newark, USA)
Local microdosing as means to control a nonlinear surface reaction
[Abstract]
19:00 Concert by
Bastian Schäfer
(Berliner Philharmoniker, First Violinist)
Matthew Hunter (Berliner Philharmoniker, Violist)
1. Georg Friedrich Händel, Chaconne in G Major
2. Wolfgang Amadeus Mozart, Duo KV 423, for Violin and Viola
Allegro
Adagio
Rondeau
(the concert takes place in the Ballsaal)
19:30 Dinner
Session chair: E. Bodenschatz
9:00
Y. Nishiura
(Sapporo, Japan)
Entropy and sensitivity of particle patterns in dissipative systems
[Abstract]
9:35
B. Fiedler
(Berlin, Germany)
Kinematics of forced meandering and drifting spirals
10:10
Y. Kevrekidis
(Princeton, USA)
Some examples of coarse-grained computation in complex systems
[Abstract]
10:45 – 11:15 Coffee Break
Session chair: G. Ertl
11:15
M. Marek
(Prague, Czech Republic)
Nonlinear dynamics of forced catalytic mufflers
[Abstract]
11:50
K. Krischer
(München, Germany)
Instabilities and pattern formation during electro-oxidation of H2-CO mixtures in a
fuel cell relevant system
[Abstract]
12:25
M. Falcke
(Berlin, Germany)
By chance or by the clock: How does intracellular calcium oscillate?
13:00
Y. Kuramoto
(Sapporo, Japan)
Early days of the research on coupled oscillators
13:30 Closing
Posters will be presented in the Ballsaal
