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SEMINARIOS 2010<br>
Gerencia Investigacion y Aplicaciones - TANDAR -
CNEA<br>
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Viernes 6 de Agosto, 11:00 Hs.<br>
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ATENCIÓN CON EL CAMBIO DE LUGAR USUAL:<br>
<br>
SALA DEL NIVEL 63, TANDAR<br>
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Prof. Dr. Marcus Müller (*)<br>
Institut für Theoretische Physik - Georg-August Universität -
Göttingen<br><br>
<br>
"Modelling structure formation in diblock copolymer materials on
patterned<br>
surfaces"<br><br>
(presentación en inglés)<br><br>
Diblock copolymers self-assemble into a variety of periodic<br>
nano-structures in the bulk. The length scale is dictated by the
molecular<br>
extension and ranges from 10 nm to 100nm. The application of
copolymer<br>
materials have attracted abiding interest for templating
nano-structures<br>
in microelectronics and catalysis. If the copolymer material is
in<br>
contact with a patterned surface, the morphology of the diblock
copolymer<br>
may either replicate the surface pattern without defects over large
areas<br>
or a more complex reconstruction of the soft morphology at the
patterned<br>
surface occurs depending on the mismatch between the symmetry and
length<br>
scale of surface pattern and bulk morphology. Certain irregular patterns
<br>
that do not have an analogue in the bulk phase diagram, can be
replicated<br>
by the adding "defectants" to the copolymer material.
These are<br>
substances;e.g., homopolymers or nanoparticles; enrich at<br>
locations, where the substrate pattern deviates from the bulk
morphology,<br>
and thereby reduce the excess free-energy of these local structures,<br>
permitting defect-free replication.<br><br>
Using computer simulation of soft, coarse-grained polymer models, we<br>
investigate the directed assembly of copolymer materials on various<br>
surface patterns. The model allows us to investigate large,<br>
three-dimensional systems with an experimentally relevant degree of<br>
polymerization by computer simulations. Special methods for
computing<br>
free-energy differences of self-assembled morphologies and<br>
grain-boundaries will be discussed and applied to block copolymers in
thin<br>
films. The computer simulation provides a wealth of information about
the<br>
three-dimensional structure, its free energy, and also about the
kinetics<br>
of structure formation.<br><br>
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<br>
(*) Ph.D. (1995) and Habilitation (1999) in theoretical physics
from the<br>
Johannes Gutenberg-Universität in Mainz, Germany. He researched at
the<br>
University of Washington, at the University of Mainz, at the
Edinburgh<br>
Parallel Computing Centre, at the Instituto de Investigaciones<br>
Fisicoquímicas Teóricas y Aplicadas of La Plata, at the Institute of
Solid<br>
State Research of Jülich, at the University of California and at the<br>
Comisión Nacional de Energía Atómica. He was guest professor at the<br>
Universidad Nacional de General San Martin, assistant professor at
the<br>
University of Mainz, and associate professor at the University of<br>
Wisconsin-Madison. He is presently university professor at the
Institute<br>
for Theoretical Physcis at the Georg-August University of
Göttingen. He<br>
was awarded with the Feodor Lynen fellowship from the Alexander von<br>
Humbodt Foundation, with the Sponsorship for the Research of the<br>
University of Mainz, with the Heisenberg fellowship of the German
Science<br>
Foundation, with a Lichtenberg professorship from the Volkswagen<br>
Foundation and with the “John H. Dillon” Medal of the American
Physical<br>
Society.<br>
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<br>
Quedan todos cordialmente invitados!<br><br>
11:00 hs - Sala del nivel 63, TANDAR<br>
CNEA - Centro Atomico Constituyentes<br>
Av. Gral. Paz 1499 (y Constituyentes)<br>
6772-7065 / 7007 / 7072 / 7081<br><br>
Coordinadores:<br>
Dr. Andres Arazi: < mailto:
<a href="https://www2.tandar.cnea.gov.ar/sqmail/src/compose.php?send_to=arazi%40tandar.cnea.gov.ar">
arazi@tandar.cnea.gov.ar</a> ><br>
Dr. Alejandro Monastra: < mailto:
<a href="https://www2.tandar.cnea.gov.ar/sqmail/src/compose.php?send_to=monastra%40tandar.cnea.gov.ar">
monastra@tandar.cnea.gov.ar<br>
</a>Secretaria:<br>
Graciela Mastrogiacomo: < mailto:
<a href="https://www2.tandar.cnea.gov.ar/sqmail/src/compose.php?send_to=gmastro%40tandar.cnea.gov.ar">
gmastro@tandar.cnea.gov.ar</a> ><br>
<a href="http://www.tandar.cnea.gov.ar/eventos/seminariosGIyA/" eudora="autourl">
http://www.tandar.cnea.gov.ar/eventos/seminariosGIyA/<br><br>
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