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Northern NY Section of the American Chemical Society Receives National Awards for Programs Run by Clarkson's Dr. Dana Barry

cont. from page 9

Dr. Barry is an officer for the ACS's Northern NY Section, a certified professional chemist, the president of Ansted University's Scientific Board, and a member of the National Science Teachers Association. She serves on the editorial review board for The Chemist, a publication of the American Institute of Chemists, and The Science Education Review, an international journal published in Australia. She served as a visiting professor in Malaysia (2001), Japan (2002), and England (2003). Dana has received nine APEX awards for Publication Excellence and other professional honors, and has authored over 100 professional publications including five books. In addition, her biographical profile is listed in the Outstanding Gale Reference Something About the Author (Volume 139, June 2003).

Dr. Dana Barry Receives APEX Award for the CAMP Newsletter

CAMP Editor/Technical Writer Dr. Dana Barry received an APEX 2004 Award of Publication Excellence, for editorial content and over-all communications excellence, for the 2002-2003 CAMP Annual Report Newsletter. This is the ninth consecutive time that Dr. Barry's work has been recognized with an APEX award. More than 5,500 entries were submitted to this year's competition of which some 1600 awards were distributed in 109 subcategories of 11 major areas. APEX awards are sponsored by Communications Concepts, Inc. in Springfield, VA.

Modeling of Next-Generation Semiconductor Devices

Professor Ming-Cheng Cheng, in collaboration with Professor Privman, is working with Drs. Min Shen and Semion Saykin of the Center for Quantum Device Technology to study spin-polarized transport and injection in semiconductor spintronic devices. The goal of this project is to develop transport models at different levels of efficiency and accuracy for modeling and optimization of semiconductor spintronic devices.

Also Professor Cheng and some of his graduate students have been developing efficient thermal models and circuits for the SOI devices and interconnects to take into account self-heating effects in SOI chips. These efficient thermal models and circuits greatly improve the accuracy of the existing thermal circuit used in the SOI industry for electro-thermal simulation of integrated circuits. The models/circuits will provide useful tools for modeling, characterization, optimization and reliability prediction of SOI devices and integrated circuits.

SUPPORTING TECHNOLOGIES

Extruders

Professor Greg Campbell, director of CAMP's Extrusion and Mixing Consortium, continues to develop a more descriptive analysis for screw pumps, augers, and extruders. Over the past year much of his group's effort has been focused on the conveying of particular solids with these devices. In addition, his group is working to understand structure development in concentrated two phase systems. They found that bimodal dispersions act quite differently from single particle size systems. Also they have an actual program focused on understanding the reactions and physical changes that occur in an epoxy which forms liquid crystalline structures.

Measurement of Number Concentration of Submicron and Ultra-Fine Particles

There is a growing interest in the measurement of the number concentration of submicron and ultra-fine particles both in the environment and in various industrial settings. CAMP Professor Philip Hopke, the Bayard D. Clarkson Distinguished Professor, and his group are very involved in this work. One of the major hypotheses that has been proposed to explain the adverse health effects of ambient airborne particulate matter is that ultra-fine particles that are present in high number concentrations are the responsible agents. In this case, particle mass that is the currently measured quantity may not be the best indicator of potential adverse consequences. Thus, particle number concentration measurements are needed to test this hypothesis. In addition, there are a variety of particle counting needs in industrial settings. With the increased emphasis on nanometer sized particles, particle counters can be important in process control. There is currently only a limited number of instruments available to make such measurements. At Clarkson University, Professor Hopke and his group have been exploring heterogeneous nucleation with a turbulent mixing condensation nuclei counter (TMCNC) with support from the Environmental Protection Agency, NYSTAR and NYSERDA. Although the concept of a TMCNC has been available for over 15 years, it has been underutilized and could provide an instrument capable of particle detection down to 2 nm and could be developed into a viable commercial instrument. Clarkson University and Rupprecht and Patashnick, Inc., a leading manufacturer of airborne particle monitoring instruments, are developing this instrument into a functional, stand-alone particle counting prototype system that could then be the basis for a commercial product. Recently, a Commercialization Assistance Program grant from the New York Indoor Environmental Quality Systems Center was provided to Rupprecht and Patashnick to assist in the development of a commercial prototype.

Particle Size Analysis and the Use of Particulates in Advanced Materials Processing

Professor Don H. Rasmussen has published extensively in the areas of nucleation and growth of new phases and on techniques to study nucleation and particle growth processes. His research is focused on (1) the study of phase stability in ternary systems using DIT (diffusive interface transport) techniques; (2) characterizing concentrated colloidal systems using fiber optic dynamic light scattering; (3) metal particle nucleation and growth in non-aqueous media; (4) nano-scale ceramic particle nucleation and growth, and in the deposition of thin ceramic films; (5) homogeneous nucleation in aerosols; and finally, the influence of surface properties of polymers and colloidal particles on the chemical-mechanical polishing of metal and nonmetal films. His ongoing experimental projects include: (1) measurement of the dynamic scattered light power spectrum from concentrated colloidal systems using a bifurcated single mode fiber optic probe (being developed to study particle breakdown, aggregation or growth in concentrated systems; the probe reduces the influence of multiple scattered light), (2) determination of the particle size from the shape of the power spectrum and the particle concentration from the integrated power spectral density, (3) nucleation and growth of particles in supersaturated systems (both aerosols in vapors and particles in supersaturated liquors), and (4) the characterization of the hardness and surface properties of CMP polishing pads by surface energy determination and measurement of hardness using nano-indentation resistance. The establishment of a laboratory for the determination of phase equilibrium in ternary surfactant systems is currently a high priority.

Granular Flows and Materials

CAMP Professor Hayley Shen, of Clarkson University's Department of Civil and Environmental Engineering, is investigating granular flows in terms of constitutive relations, flow rate effects, particle size and shape effects. She is also interested in two-phase flows. Professor Shen is currently funded by a NASA Microgravity Fluid Physics Program to study the behavior of granular flows in different gravitational fields. This project is being conducted in collaboration with researchers from the University of Florida and Cornell University.

Professor Shen is also applying the new knowledge on dry granular materials to improve the design of soil handling machinery. She is collaborating with Professor Janoyan on a project supported by John Deere. They combine laboratory tests andmathematical modeling to simulate soil/structure interactions

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