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In Situ Studies of Nanocrystalline Particle Formation in Supercritical Fluids
M. Bremholm, J. Becker, N. Lock, B.B Iversen
University of Aarhus, DK
Keywords:
Supercritical Fluids, Nanoparticles, in situ SAXS/WAXS, Growth kinetics
Abstract:
Understanding the structural dynamics of nanoparticle formation is important for the development of novel and controlled syntheses of high quality nanomaterials. Syntheses using supercritical fluids as a solvent are a promising method for high quality nanomaterials due to their unique thermodynamic properties, but the mechanisms controlling the product characteristics, such as crystal phase, size, size distribution and morphology are poorly understood. We have developed X-ray scattering techniques, which allow us to study nanoparticles formation in supercritical fluids. The information, which can be obtained by using time-resolved simultaneous Small Angle X-ray Scattering (SAXS) and Wide Angle X-ray Scattering (WAXS), is demonstrated by recent studies of the formation of TiO2, ZrO2, AlOOH/Al2O3 and LiCoO2 nanoparticles.
Nanotech 2008 Conference Program Abstract
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