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CENTER FOR EXCITONICS SEMINAR SERIES
Structuring materials on multiple length scales for energy applications
Andreas Stein, Department of Chemistry, University of Minnesota
THURSDAY, OCT 25, 2012
3:00 PM - 4:00 PM
RLE HAUS ROOM: 36-428
Abstract
Nanoporous and nanostructured materials are becoming increasingly important for advanced
applications, including energy storage and conversion materials. Templating methods based
on hard templates (colloidal crystal templating, nanocasting) and soft templates
(surfactant systems) provide access to nanostructured porous materials in which both the
internal pore architecture and the material's morphology can be controlled at a range
of length scales from the subnanometer to the millimeter scale. Significant benefits of
materials with structural features of nanometer and submicrometer dimensions have been
demonstrated, at least at the proof-of-concept stage. Some applications profit from short
diffusion paths in hierarchical nanostructures. Other applications take advantage of the
relatively high surface areas of nanoporous solids and improved reactivity. Yet others
benefit from the precise spacing of active materials in a periodic porous host. Using
examples of porous materials for excitonics, lithium ion batteries, solar thermal energy
conversion, and gas separation, this presentation will highlight methods of controlling
pore architecture and materials morphology at various length scales. In particular,
factors that influence structural assembly and interactions between multiple components
(multiple templates, host-guest interactions) will be emphasized, as these determine the
distribution and spacing of components in the porous solids, factors that control optical,
electronic, and reactive properties of the materials.o
Bio
Professor Andreas Stein obtained his B.Sc. degree in chemistry at the University of
Calgary in 1986 and carried out his graduate work with Professor Geoff Ozin at the
University of Toronto, specializing in the synthesis and characterization of zeolite
materials. After earning his Ph.D. degree in 1991, he joined the Advanced Inorganic
Materials group at the corporate research labs of Bayer A.G. in Germany as an NSERC
postdoctoral fellow, followed by postdoctoral research with Professor Tom Mallouk at both
the University of Texas, Austin, and at Penn State University. In 1994 he joined the
faculty at the University of Minnesota, where he is now a Distinguished McKnight
University Professor of Chemistry. Professor Stein's research interests are in the
field of solid state chemistry, in particular porous materials and nanocomposites
targeting a wide range of applications, including membranes, solar thermal energy
conversion, bioactive glasses, lithium ion batteries, ion-selective sensors, catalyst
materials, polymer-clay nanocomposites, photonic crystal materials, and pigments. His
program has pioneered research on the compositional and structural control of templated
mesoporous and macroporous sieves, nanoparticle shaping, open-framework structures, and
polymer/inorganic nanocomposites. He is the recipient of several awards, including a Merck
Professorship in Chemistry, a 3M Faculty Grant, a Dupont Young Professor Grant, an NSF
CAREER Award, a McKnight Land-Grant Professorship, and a David & Lucile Packard
Fellowship. In 2011, he was listed among the top 100 materials scientists for impact
during the decade 2000-2010 by Thomson Reuters. He is on the editorial advisory boards for
Advanced Functional Materials and Particle and has been on the board for Chemistry of
Materials.
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PLEASE POST AND FORWARD TO YOUR GROUPS
_______________
CENTER FOR EXCITONICS SEMINAR SERIES
Structuring materials on multiple length scales for energy applications
Andreas Stein, Department of Chemistry, University of Minnesota
THURSDAY, OCT 25, 2012
3:00 PM - 4:00 PM
RLE HAUS ROOM: 36-428
Abstract
Nanoporous and nanostructured materials are becoming increasingly important for advanced
applications, including energy storage and conversion materials. Templating methods based
on hard templates (colloidal crystal templating, nanocasting) and soft templates
(surfactant systems) provide access to nanostructured porous materials in which both the
internal pore architecture and the material's morphology can be controlled at a range
of length scales from the subnanometer to the millimeter scale. Significant benefits of
materials with structural features of nanometer and submicrometer dimensions have been
demonstrated, at least at the proof-of-concept stage. Some applications profit from short
diffusion paths in hierarchical nanostructures. Other applications take advantage of the
relatively high surface areas of nanoporous solids and improved reactivity. Yet others
benefit from the precise spacing of active materials in a periodic porous host. Using
examples of porous materials for excitonics, lithium ion batteries, solar thermal energy
conversion, and gas separation, this presentation will highlight methods of controlling
pore architecture and materials morphology at various length scales. In particular,
factors that influence structural assembly and interactions between multiple components
(multiple templates, host-guest interactions) will be emphasized, as these determine the
distribution and spacing of components in the porous solids, factors that control optical,
electronic, and reactive properties of the materials.o
Bio
Professor Andreas Stein obtained his B.Sc. degree in chemistry at the University of
Calgary in 1986 and carried out his graduate work with Professor Geoff Ozin at the
University of Toronto, specializing in the synthesis and characterization of zeolite
materials. After earning his Ph.D. degree in 1991, he joined the Advanced Inorganic
Materials group at the corporate research labs of Bayer A.G. in Germany as an NSERC
postdoctoral fellow, followed by postdoctoral research with Professor Tom Mallouk at both
the University of Texas, Austin, and at Penn State University. In 1994 he joined the
faculty at the University of Minnesota, where he is now a Distinguished McKnight
University Professor of Chemistry. Professor Stein's research interests are in the
field of solid state chemistry, in particular porous materials and nanocomposites
targeting a wide range of applications, including membranes, solar thermal energy
conversion, bioactive glasses, lithium ion batteries, ion-selective sensors, catalyst
materials, polymer-clay nanocomposites, photonic crystal materials, and pigments. His
program has pioneered research on the compositional and structural control of templated
mesoporous and macroporous sieves, nanoparticle shaping, open-framework structures, and
polymer/inorganic nanocomposites. He is the recipient of several awards, including a Merck
Professorship in Chemistry, a 3M Faculty Grant, a Dupont Young Professor Grant, an NSF
CAREER Award, a McKnight Land-Grant Professorship, and a David & Lucile Packard
Fellowship. In 2011, he was listed among the top 100 materials scientists for impact
during the decade 2000-2010 by Thomson Reuters. He is on the editorial advisory boards for
Advanced Functional Materials and Particle and has been on the board for Chemistry of
Materials.