In-Situ Studies of Copper Nanoparticles Using a Novel Tandem Ultra-High Vacuum Particle Production Chamber Transmission Electron Microscope
Olynick, Deirdre Lynn
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https://hdl.handle.net/2142/82878
Description
Title
In-Situ Studies of Copper Nanoparticles Using a Novel Tandem Ultra-High Vacuum Particle Production Chamber Transmission Electron Microscope
Author(s)
Olynick, Deirdre Lynn
Issue Date
1997
Doctoral Committee Chair(s)
Gibson, J. Murray
Department of Study
Materials Science and Engineering
Discipline
Materials Science and Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Condensed Matter
Language
eng
Abstract
Nanophase materials, a compaction of nano-particles, are arguably a new phase of matter whose high grain-boundary-to-volume ratio leads to new and enhanced material properties. Previously, these materials have been difficult to study because of their sensitivity to contaminating atmospheres. We have built a novel apparatus, an ultra-clean nano-particle production chamber connected directly to a ultra-high vacuum transmission electron microscope (UHVTEM), which allows in-situ TEM study of various nano-particle phenomena without exposure to contaminating atmospheres. Using this apparatus, we have shown specific contaminants' effects on copper nano-particle growth mechanics, morphology, and sintering. Our findings contribute significantly to our understanding of nano-particles and shed light on how to approach the ideal nanophase material.
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