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| Parsons
Professor of Chemical Engineering |
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INTRO |
CURRENT
RESEARCH |
RECENT
PUBLICATIONS |
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Ultrafine particles
produced in gas phase processes form large agglomerates with fractal-like structures. The
energies which bind the particles together are important for downstream processing. The
rate of restructuring is an activated process, and the restructuring energy can be found
from an Arrhenius plot. Most recently we have discovered that nanoparticle chain
aggregates made of transition metal oxides show elastic behavior. They stretch under
tension and contract when the tension is relaxed. Several powerful experimental techniques
are available for characterizing the properties of very small particles. Electrical
particle analyzers and condensation particle counters are used for on-line measurement.
Transmission and scanning electron microscopy and atomic force microscopy are useful
methods of deposited aggregate characterization.
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