Detection and Characterization of Chemicals Present in Tank Waste - Final Report - 09/15/1998 - 09/14/2001 Page: 3 of 13
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Executive Summary
A multifaceted, interdisciplinary research program has served to provide
fundamental insights and practical technological advances toward the development of
miniaturized, highly-sensitive, tunably-selective sensors for monitoring chemical
constituents in complex vapor and liquid matrices.
The aim of this work is to support high-level waste management by improving
methodologies and technologies for low cost, safe, and effective measurements of the
chemical, physical, and radiological characteristics of DOE storage tanks as well as
samples from surrounding areas. Specifically, the focus has been on magnifying,
controlling, and augmenting the chemi-mechanical responses of microcantilever (MC)
sensors. Key advances have resulted from modifying the structures of these MCs with
unique geometries and nanostructured surfaces that provide higher surface area for the
binding of analyte and analyte-recognizing receptors. These novel surfaces also created
new mechanisms of surface stress that have dramatically magnified the responses of MCs.
Methods of uniformly coating the surfaces of smooth and nanostructured surfaces have
been explored and advanced. These methods include vapor deposition, spin coating, and
direct chemical reaction to form self assembled monolayers. The methods of modifying
MC surfaces are being be expanded to include matrix assisted pulsed laser evaporation to
facilitate controlled deposition of a wider array of selective phases. The chemically
selective phases include bifunctional chelating polymers, siloxane-based GC polymers, and
cavitand macrocycle receptors such as calixarenes and cyclodextrins (CDs). Using the
basic structure of native CDs as a template, new CDs have been synthesized to increase the
range of cavitand receptors available for selective binding of DOE significant analytes.3
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Datskos, Panos G. & Sepaniak, Michael J. Detection and Characterization of Chemicals Present in Tank Waste - Final Report - 09/15/1998 - 09/14/2001, report, September 14, 2001; United States. (https://digital.library.unt.edu/ark:/67531/metadc719185/m1/3/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.