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Mater Sci Nanotechnol 2017 | Volume 1 Issue 2
allied
academies
Nanomaterials and Nanochemistry
November 29-30, 2017 | Atlanta, USA
International Conference on
N
ovel nanostructured metal oxide island sites are made
to decorate a microporous/nanoporous array forming
efficient sensor platforms. These nanoparticle metal oxide
island sites, formed from easily obtained solutions allow the
formation of sensor platforms distinct from film-based coating.
The nanostructure directing acidic metal oxide sites which
vary in their Lewis acidity control the electron transduction
process. The interaction of analytes with these island sites
varies in a predictable manner and can be modified through
in-situ functionalization of their Lewis acidity. The microporous
structure allows rapid Fickian diffusion of analytes to the
active nanostructure island sites whose reversible interaction
dominates the sensor response as it requires low energy
consumption. Highly accurate repeat depositions are not
required. The island sites are deposited at sufficiently low
concentration so as not to interact electronically with each
other. The response time of these interfaces is more rapid
than film-based depositions, which require a more lengthy
diffusion time. The sensors are reversible. The nanoporous
structure prevents sintering of the island centers at elevated
temperatures. The concentration of detection centers can
be made to produce an optimum matrix of enhanced sensor
responses and force a dominant, distinct, analyte-interface
physisorption (rather than chemisorption). The produced
semiconductor interface is easily functionalized to create an
enhanced range of nanoparticle semiconductor sites. The
matrix provides a sensitive means of transferring electrons that
are easily detected. The sensors operate at room temperature
as well as elevated temperatures. Low energy magnetic field
signal enhancement can be achieved with transition metals.
Contaminated sensors can be readily rejuvenated. Pulsedmode
operation ensures low analyte consumption and high analyte
selectivity and further provides the ability to rapidly assess false
positive signals using Fast Fourier Transfer techniques, Solar
pumped sensors requiring low light levels (≤ 1 Watt) have been
demonstrated. Water vapor contamination can be greatly if not
entirely reduced. The modeling of sensor response with a new
Fermi energy distribution based response isotherm is found to
be superior to other isotherms. Sensors can bemade to operate
efficiently for two gases simultaneously. Modes of extending
these studies to multiple gas arrays have been considered.
Speaker Biography
James L. Gole received the B.S. degree in chemistry from the University of California,
Santa Barbara where he was an NSF Research Fellow (1967). He received the Ph.D from
Rice University (1971) where he was a Phillips Research Fellow. He was an NSF Post-
Doctoral Fellow at Columbia University from 1971 to 1973. He joined the Department
of Chemistry at M. I.T. in 1973 and in 1977 he joined the School of Chemistry at the
Georgia Institute of Technology where he became Professor of Chemistry in 1981. In
1983 he joined the School of Physics, GIT, where he is currently Professor of Physics.
In 2002, he became a joint Professor in Mechanical Engineering. He is a Fellow of the
American Physical Society (APS) and the American Association for the Advancement of
Science (AAAS). Dr. Gole is interested in high temperature materials nanosynthesis, the
chemical physics of surfaces, porous silicon structures for hybrid nano/microsensors
and nanostructure enabled photocatalytic reactors, nanostructured directed sensing,
and the IHSAB principle. He holds 27 patents and has published over 300 papers. Dr.
Gole has been a recipient of the Sustained Research Award of the Sigma Xi Research
Society. He has been named GIT Outstanding Research Author. In 2005, he was named
Outstanding Undergraduate Research Mentor. He was also recipient of the Professional
of the Year Award from Worldwide Who’s Who.
e:
james.gole@physics.gatech.eduJames Gole
Georgia Institute of Technology, Georgia
Nanostructure directing sensor interfaces created from nanoparticle island sites
deposited to micro- porous arrays