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Nano
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Nano Onderzoek
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Groundbreaking
Nanotechnology Research at
The University of Scranton Published in `Science'
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SCRANTON,
Pa., Nov. 12 /PRNewswire/ -- For the first time, an
innovative
research technique successfully completed a detailed
measurement of how heat
energy is created at the molecular level, an approach
that could have far-
reaching implications for developing nano-devices in
health care, computer and
other industries.
Research results, published in the October 15 issue
of "Science," detail a
collaborative effort involving The University of Scranton,
a Jesuit university
in Pennsylvania, and the University of Illinois at Urbana-Champaign,
a
research institution in Illinois.
"This is the first time that anyone has measured
how a specific motion of
a molecule on one side of a molecular wall causes molecules
within the wall to
move," said John Deak, Ph.D., assistant professor
of chemistry at The
University of Scranton. "In nanotechnology, researchers
design materials whose
properties originate in clusters of molecules on the
nanometer level. This
research can be used to help us better understand how
molecules interact on
these dimensions."
"The experiment detailed the pathways for energy
transfer and also
provided the tools to study other molecules," said
Dana Dlott, Ph.D.,
chemistry professor, University of Illinois. "In
designing nanoscale devices,
the shapes of the molecules must be designed not only
to be small and fast,
but also to move heat effectively. There is no reason
that this technique is
not applicable to just about any molecule."
The research used vibrational spectroscopy with picosecond
time resolution
to monitor the flow of energy across surfactant molecules
that separate
droplets of confined water from a nonpolar liquid phase.
Their research shows
that the surfactant layer must be analyzed in terms
of its vibrational
couplings, rather than by ordinary heat conduction.
Their research provided
the first detail of the precise pathways for interfacial
vibrational energy in
both time and space resolution.
The paper, entitled "Vibrational energy transfer
across a reverse micelle
surfactant layer," was published in "Science"
and on the "Science Express" Web
site. Faculty and students involved are Dr. Deak and
his undergraduate student
Timothy Sechler from The University of Scranton; and
Dr. Dlott, Yoonsoo Pang,
graduate assistant, and Zhaohui Wang, post-doctoral
research associate, from
the University of Illinois.
The National Science Foundation, the Air Force Office
of Scientific
Research and the U.S. Department of Energy supported
this work. Two University
of Scranton research grants also supported this research.
SOURCE The University of Scranton
Web Site: http://www.scranton.edu
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This
story has been adapted from a news release -
Diese Meldung basiert auf einer Pressemitteilung -
Deze
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