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surprising subtleties, will be described. On a different
tack, this talk will also describe how our understanding
of the manner in which aggregates form has evolved
through the years to include recent work that shows that
a direct consequence of the fractal morphology is that
such systems must ultimately form gels. Dr. Sorensen will
conclude by pointing to as yet unresolved questions that
indicate that fractal aggregates abound with opportunities
for new and useful research.
Chris Sorensen is the Cortelyou-Rust University
Distinguished Professor and a Distinguished Teaching
Scholar at Kansas State University in the departments of
physics and chemistry. He earned BS and PhD degrees at
the Universities of Nebraska and Colorado, respectively.
His current research focuses on aggregation phenomena
in aerosols and colloids, light scattering, and the synthesis
and physical chemistry of nanoparticles. He has published
more than 250 professional publications and holds six
patents. He received the David Sinclair Award of the
AAAR in 2003 and served as president in 2007 to 2008.
In 2007 he was named the National Professor of the Year
for Doctoral and Research Universities by the CASE/
Carnegie Foundation for the Advancement of Teaching.
speCIAl sYmposIA
nAnoToxIColoGy
Convenors: Michele Ostraat and Amy Wang
As nanotechnology, an inherently interdisciplinary
technology, continues its expansion into diverse R&D
and product portfolios, the need to assess the health
and environmental implications of nanotechnology is only
growing. Currently a complex challenge, nanotoxicology
research must address untraditional issues, including
dearth of suitable instruments, nonstandard protocols and
approaches that cause differences in the measured toxicity
and difficulties in reproducibility, and intricate interactions
of nanomaterials in biological and environmental systems.
The purpose of this symposium is to bring together an
interdisciplinary audience of aerosol scientists, instrument
engineers, industrial hygienists, toxicologists, and others
to 1) exchange ideas and discuss current best practices
across disciplinary boundaries, 2) report new information
that can guide research priorities for the future, and
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