This calendar is your conduit to the events in Plan-It Purple that pertain specifically to the McCormick School of Engineering. If you would like to list an event on the calendar, please consult the list of department contacts.
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Event List
This list shows events for May 8 only. [Show all events]
ChBE Seminar: M.Thackeray, Argonne National Laboratory
Thursday May 8, 2008 at 9:00 AM — Tech LR4
The Evolving Lithium Battery Economy - A Personal Perspective
Dr. Michael Thackeray
Argonne National Laboratory
Thursday, May 8, 2008 at 9:00 AM
The Technological Institute, Lecture Room 4
2145 Sheridan Road
Refreshments will be served at 8:45 AM
Event URL: http://www.chem-biol-eng.northwestern.edu/news/seminars/
For more information, contact:
Allison Sillers
a-strick@northwestern.edu
847-491-2773
Chemical & Biological Engineering Colloquia
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Mechanical Engineering Seminar: Prof. Eiji Osawa, Shinshu Univ, Japan
Thursday May 8, 2008 at 11:00 AM — 2133 Sheridan Rd. Ford Bldg, ITW auditorium, Rm 1.350
Recent Progress in the R&D of Single-Nano Diamond Particles
Abstract: In the past 40+ years, R&D in detonation nanodiamond has long suffered from the persistent covalent aggregation among primary particles. Although the nature of this tight assembly has not yet been thoroughly understood, it is most likely that, as in all other nanocarbons including soot (carbon black) and carbon nanohorn formed by the bottom-up processes, primary particles of nanodiamond were glued to each other through C-C bonding as they are formed under high-temperature high-pressure conditions to form secondary particles of 60-200 nm in size. It was impossible to disintegrate the covalent aggregates since its discovery in 1963 until 2002, when we applied wet stirred-media milling with zirconia beads to disintegrate them by brute force. The resulting colloid is diaphanous, although pitch black in high concentration, but surprisingly stable. Dried residue from the milled colloid is van der Waals aggregates of primary particles, and can be re-dispersed quickly in water and a few organic solvents by sonication to form stable colloidal solution which is transparent and forms no precipitates after long-standing.
Dispersed single-nano diamond (DSND) particles, as we temporarily call them, have a narrow size-distribution of 4.6±0.7nm irrespective of its origin and methods of determination. They behave distinctly different from the previously commercialized covalent aggregates (under the name of Ultradispersed Diamond) and exhibit long-dreamed size-dependent behavior of semi-quantum particles, a new breed in science and technology. Here we report some of our recent results obtained during preliminary scanning of the applicative possibilities of DSND particles.
For more information, contact:
Arlene Preus
a-preus@northwestern.edu
847 293-7417
McCormick - Mechanical Engineering
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