Synthesis, Characterization and Evaluation of Sonochemically Generated Materials
Ekhtiarzadeh, Arash
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https://hdl.handle.net/2142/84036
Description
Title
Synthesis, Characterization and Evaluation of Sonochemically Generated Materials
Author(s)
Ekhtiarzadeh, Arash
Issue Date
2001
Doctoral Committee Chair(s)
Kenneth S. Suslick
Department of Study
Chemistry
Discipline
Chemistry
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Materials Science
Language
eng
Abstract
In the fourth chapter we have studied the effects of experimental parameters on size distribution of sonochemically generated Fe colloids. It has been found that changing temperature, precursor concentration, stabilizer amount, frequency, and sparging gas has no noticeable effect on the size distribution of Fe colloids, which remain in the 3--12 nm range. We have concluded that the size distribution does not change significantly because small Fe particles (∼0.4 nm with MP ≈ 350 K) melt together and coalesce to form larger (3--12 nm) particles, at which point the melting temperature is high enough that makes further coalescence unlikely.
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