1. Department of Chemical Engineering, University of MissouriColumbia, Columbia, Missouri 65211
2. IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120
3. STC 230-3, NASA Ames Research Center, Moffett Field, California 94035
4. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802
5. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853
6. Exxon Research and Engineering Company, Corporate Research, Annandale, New Jersey 08801