Thermal Probes of Nanoparticle Interfaces: Thermodiffusion and Thermal Conductivity of Nanoparticle Suspensions
Putnam, Shawn Arthur
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https://hdl.handle.net/2142/82814
Description
Title
Thermal Probes of Nanoparticle Interfaces: Thermodiffusion and Thermal Conductivity of Nanoparticle Suspensions
Author(s)
Putnam, Shawn Arthur
Issue Date
2007
Doctoral Committee Chair(s)
Cahill, David G.
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)
Engineering, Materials Science
Language
eng
Abstract
At T < 20°C, all nanoparticles studied in nearly pure water were found to migrate to the hot regions of the fluid; i.e., DT 50°C, the thermodiffusion coefficients were positive with a value consistent with the predictions of a theoretical model originally proposed by B. Derjaguin that is based on the enthalpy changes due to polarization of water molecules in the double-layer. At high temperatures, DT was also independent of particle size.
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