UNT Research, Volume 20, 2011 Page: 43
50 p. : col. ill. ; 28 cm.View a full description of this periodical.
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structures of bioactive glasses for use in bnr
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the glasses at the atomic level, invest
ing how they dissolve in a body fluid
environment and their bioactivity aln
biocompatibility to soft and hard tissue
he says.
After fabricating the bioactive
glasses, Du studies how the atoms are
structured through computer simulationsI
using UNT's Talon High-Performance
Computing System and instruments at
the Center for Advanced Research and
Technology, as well as high energy X-ray
sources at Argonne National Laboratory.
Through the integrated research of
computer simulation and experimental
studies, he is uncovering the relationships
between the structure and the bioactiv-
ity of the material. He specifically looks
at how the glasses form a mineralized
hydroxyapatite layer on their surface that
allows them to grow to the bone.
"Glass structures are one of the fron-
tiers of physical science. Unlike crystal
structures, the glass structures lack long-
range order," Du says, adding that their
complexity is what makes the integrated
modeling and experimental approach an
ideal methodology.
"With detailed atomic structure
from simulations, we can see how they
bond to each other, if they form clusters,
channels or intermediate-range orders,
and how these would influence properties
such as diffusion and vibrational behav-
iors. All of this would help us identify the
structural origin of their bioactivity and
design new glass compositions for various
biomedical applications."
Du also uses computer modeling in
other nanotechnology research, in areas
such as molecular crystals for flexible
electronics, semiconductor nanocrystals,
plasma interaction of dielectric materi-
als for micro- and nanoelectronics, and
defects, surfaces and interfaces in materi-als for energy and environmental applica-
tions. He is a member of UNT's Center
for Advanced Scientific Computing and
Modeling and the Materials Modeling
Research Cluster.
"Materials science used to be empiri-
cal - trial and error - but now with
improved computer modeling and simula-
tion, we can have a deeper understanding
of the correlation between different levels
of structures and material properties and
can predict with deep insights," he says.
"We're not replacing experiments, but
complementing them, to understand the
nature of material behavior."
NANOELECTRONICS OF THE FUTURE
Keeping up with the demands of
technology-savvy consumers has semi-
conductor companies such as Texas
Instruments, Intel Corp. and Appleworking to meet needs 10 to 20 years
in the future. Saraju Mohanty, associate
professor of computer science and engi-
neering, is designing application-specific
hardware these companies and customers
will want.
Mohanty, director of UNT's Nano-
system Design Laboratory, and student
researchers collaborate with major
industry players such as Intel using the
International Technology Roadmap of
Semiconductors. The goal is to invent
and design consumer electronic "chal-
lenges" (10 years ahead) and "grand chal-
lenges" (20 years ahead).
With about $1 million in grants
from the National Science Foundation
and the Semiconductor Research Corp.,
Mohanty keeps pushing the boundar-
ies of chip processors' capabilities in
the booming technology industry thatUNT RESEARCH 2f011
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University of North Texas. UNT Research, Volume 20, 2011, periodical, 2011; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc115034/m1/43/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting University Relations, Communications & Marketing department for UNT.