COLL 387 |
| Millicent A. Firestone1, Mark L. Dietz2, Julie A. Dzielawa2, Blank A. Young2, Paul G. Rickert2, and Soenke Seifert3. (1) Materials Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, (2) Chemistry Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, (3) Advanced Photon Source Division, Argonne National Laboratory, 9700 S. Cass Ave, Argonne, IL 60439 |
| A major area of current interest in the field of nanoscience is the use of self-assembly to prepare functional materials in a spontaneous, yet controlled fashion. Of particular interest has been the development of means to direct molecular organization and to generate novel supramolecular structures in soft condensed matter phases. Recent work in this laboratory has demonstrated that addition of an appropriate concentration of water to certain room-temperature ionic liquids (RTILs), such as 1-decyl-3-methylimidazolium bromide, can trigger the self-assembly of the IL and the concomitant formation of a liquid-crystalline gel (“ionogel”) phase. By employing a variety of characterization techniques, including polarized optical microscopy, rheology, FT-IR spectroscopy, and small-angle X-ray scattering, we have examined the relationship of the water content and the nature of the IL anion to the mesoscopic structure and macroscopic properties (e.g., viscosity) of ionogels. Of particular note is the observation that by adjustment of the ionogel composition, monodomain materials can be formed that adopt lamellar, 2-D hexagonal, or cubic structures. This work was performed under the auspices of the Office of Basic Energy Sciences, Division of Materials Sciences, United States Department of Energy, under Contract No. W-31-109-ENG-38 |
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Symposium in Memory of Arthur W. Adamson
8:30 AM-12:10 PM, Wednesday, March 31, 2004 Marriott -- Orange County 4, Oral
Division of Colloid and Surface Chemistry |