The electronegativities of -SF���, -CF���SO���, and -SO���F have been measured with gas phase X-ray photoelectron spectroscopy. Of these three groups previously measured values were found only for -SF���. The electronegativities of -Cl, -Br, -CF���, and -CF���, were concurrently measured to determine how the findings of this research compare with other experimental values found in the literature. Our experimental electronegativities for -SF���, -CF���SO���, and -SO���F are 2.81 �� 0.12, 2.49 �� 0.09, and 2.92 �� 0.12 respectively. The electronegativity of -CF���, currently measured (2.78 �� 0.08) is significantly lower than other experimental values. The electronegativity of -SF��� is in agreement with other experimental values. The experimental electronegativities are compared with theoretical values calculated based on the assumption of Electronegativity Equalization and based on Mulliken's definition of electronegativity. It is found that the electronegativities calculated with Electronegativity Equalization are higher than the experimental values currently measured, and those calculated with Mulliken's definition are lower than the experimental values. / Graduation date: 1999

Graduation date: 1998

Graduation date: 1997

Chemical microreactors offer opportunities for portable power generation, on-site waste remediation and point-of-use chemical synthesis. Much of the existing development of microreactor devices involves silicon-based microfabrication techniques. It is recognized that new refractory materials are important to realizing high-temperature microreactors. Requirements of these materials include high-temperature resistance, chemical inertness and low-cost microfabrication. Advances in multilayer ceramics hold promise for the fabrication of microreactor structures from ceramic tape. Problems include creep, moderate levels of densification, and volumetric shrinkage, all of which can lead to dimensional instability. Intermetallics are another class of refractory materials which may hold some promise for high-temperature microreactor development. In this paper, a new method of forming microchannel arrays from thin layers of intermetallics is demonstrated. This method has the advantage of eliminating volumetric shrinkage due to binder removal. Various iterations of NiAl intermetallic conversion and bonding are presented. Results show that the NiAl system may be suitable as a substrate for microchannel reactor designs. / Graduation date: 2002

Thesis (Ph.D.)--University of Nebraska-Lincoln, 2006. / Title from title screen (site viewed on Mar. 13, 2007). PDF text: xiii, 159 p. : ill. (some col.) UMI publication number: AAT 3223008. Includes bibliographical references. Also available in microfilm, microfiche and paper format.

Thesis (Ph. D.)--University of Delaware, 2006. / Principal faculty advisor: Klaus H. Theopold, Dept. of Chemistry & Biochemistry. Includes bibliographical references.

Thesis (Ph. D.)--Ohio State University, 2006. / Title from first page of PDF file. Includes bibliographical references (p. 148-156).

Thesis (M.Sc.)--York University, 2004. Graduate Programme in Chemistry. / Typescript. Includes bibliographical references (leaves 88-93). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: LINK NOT YET AVAILABLE.

Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.

Thesis (M.S.)--Oregon Graduate Center, 1972.