Eduardo Glandt Presented the 2004 Leland Lecture
Prof. Eduardo Glandt presented the 2004 Leland lecture on
March 25, 2004 in McMurtry Auditorium. The title of his talk was: "Surface
Deposition: Equilibrium, Nonequilibrium and What Lies in Between."
 Eduardo
Glandt is Dean of the School of Engineering and Applied Science and the
Robert D. Bent Professor of Chemical and Biomolecular Engineering at the
University of Pennsylvania. He received his undergraduate degree from the
University of Buenos Aires in 1968 and his Ph.D. from Penn in 1977, both
in chemical engineering. Since joining the faculty, he has served Penn in
many capacities, including that of department Chairman between 1990 and
1994, and has held the Patterson and the Heuer scholarly chairs.
Dr. Glandt is an expert in thermodynamics and statistical
mechanics and has worked extensively on the prediction of the properties
of liquids and other disordered systems. He serves on the boards of many
national and local organizations, including the McGraw-Hill Chemical Engineering
Editorial Advisory Board, the Editorial Board of “Adsorption” and
the board of the University City Science Center in Philadelphia. Dr. Glandt
has received the Warren and the Lindback Awards for Distinguished Teaching
from Penn and the Victor K. LaMer Award from the American Chemical Society.
In 1996 he was elected to the National Academy of Engineering.
The endowed lectures honor the memory of Professor Thomas
Leland, a distinguished researcher and teacher who had been a member of
our department from the early 1950s until his death in 1986.
THE T.W. LELAND, Jr. LECTURE
IN CHEMICAL ENGINEERING
Eduardo D. Glandt
Dean of the School of Engineering and Applied Science
and the Robert D. Bent Professor of Chemical and Biomolecular Engineering
University of Pennsylvania
Philadelphia, PA
"Surface Deposition:
Equilibrium, Nonequilibrium and What Lies in Between"
Thursday, March 25, 2004
4:00 P.M.
McMurtry Auditorium, Duncan Hall
Rice University
Visitors should use Entrance 12 from Rice Blvd. or Entrance 8
from University and park in the stadium lot. Shuttle service
from the parking lot to Duncan Hall runs every 15 minutes
For more information about this event,
please call Diana Thomas-Walker at (713) 348-4902.
ABSTRACT
The microfabrication of films through deposition
of colloidal particles or adsorption of macromolecular solutes
is a process with multiple characteristic times. If the time between
the arrival or addition of particles is slow on the time scale
of their eventual irreversible attachment to the substrate, each
particle is able to reach local equilibrium. The sequential or
differential quenching process is a model describing this restricted
form of annealing. Since only one particle is mobile at a time,
the process takes place entirely within the limit of infinite dilution
and is perfectly amenable to theoretical study. The well-studied
case of diffusion limited aggregation is a particular (glassy)
limit of sequential quenching. Random sequential deposition is
another (high temperature) limit.
We have applied techniques from the theory of dense fluids to study the formation
of clusters or aggregates in sequentially quenched systems for varying strengths
of the interparticle forces. We studied the degree of ordering within the
clusters at densities close to the jamming limit of random sequential addition.
Sequential quenching allows a continuous evolution from totally random aggregates
to perfect crystals; in this sense it is fundamentally different from equilibrium.
We investigate the emergence of crystallinity, i.e. positional ordering and
the bond-order parameter within the microclusters. The low-temperature limit
is singular, corresponding to either a single annealed crystal or to a polycrystalline
tessellation, depending on the size of the system.
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