COLL 164 |
| Christopher L. Kitchens, Christopher B. Roberts, and M. Chandler McLeod. Department of Chemical Engineering, Auburn University, 230 Ross Hall, Auburn, AL 36849-5127 |
| Reverse micelles systems formed in tunable supercritical solvents have been effectively employed for nano-material production. Previously, we demonstrated that solvent interactions with reverse micelle surfactant tails influence metallic nanoparticle synthesis, particularly particle size and growth rate. The use of supercritical fluids as an alternative medium for nanoparticle synthesis affords the ability to control particle synthesis by adjusting the temperature and pressure of the system. In this presentation, the properties of the bulk fluid and influence on metallic nanoparticle synthesis will be discussed. Emphasis will be placed on compressed propane, SCF ethane and SCF carbon dioxide. Specifically, the ability to tailor the ultimate particle size within a given micelle system through adjustments in temperature and pressure will be presented. Furthermore, a total interaction energy model is used to predict ultimate particle sizes produced in each of the bulk solvents examined, providing a thermophysical explanation of metallic nanoparticle synthesis in microemulsions. |
|
Nanoscience and Nanotechnology
2:00 PM-5:15 PM, Monday, March 29, 2004 Marriott -- Grand Ballroom J, Oral
Division of Colloid and Surface Chemistry |