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]
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
Abstract:
Stainless Steel is protected against corrosion by an oxide layer naturally forming in the presence of humidity and oxygen. But this protection may break down locally, especially when exposed to protons and chloride ions. This gives rise to the appearance of individual microscopic metastable pits of up to a few micrometers where the surface erodes locally. However, after a few seconds the oxide layer inside the pit rebuilds and the corrosion stops. This metastable pitting process is regarded as the onset of pitting corrosion, which can lead to severe damage of the material.
We succeeded to directly visualize different aspects of the corrosion process by applying two complementary imaging methods simultaneously. While EMSI was used to detect the weakening and rebuilding of the protective oxide layer, contrast enhanced optical microscopy enabled us to follow the formation and spatial distribution of individual pits. Recently we found an expanding region of a weakened oxide layer accompanied by a succeeding front like spreading of the pit nucleation zone and an exponential growth of the number of pitting sites. Thus, the existence of propagating fronts during metastable pitting corrosion of stainless steel could clearly be proven. The results corroborate our belief that the transition to higher corrosion rates can be explained by an autocatalytic reproduction of individual metastable pits. Our experiments are accompanied by numerical simulations with a stochastic reaction diffusion model developed by A. S. Mikhailov and J. L. Hudson.
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last modified: June 7, 2006 / Oliver Rudzick