Nuclear magnetic resonance-based study of ordered layering on the surface of alumina nanoparticles in water
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Buongiorno_Nuclear Magnetic.pdf
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Author(s)
Gerardi, Craig
Cory, David G.
Buongiorno, Jacopo
Hu, Lin-Wen
McKrell, Thomas J.
Date Issued
December 2009
Journal
Applied Physics Letters
Publisher
American Institute of Physics
Citation
Gerardi, Craig et al. “Nuclear magnetic resonance-based study of ordered layering on the surface of alumina nanoparticles in water.” Applied Physics Letters 95 (2009): 253104. © 2009 American Institute of Physics
Version
Final published version
Abstract
Layering of water molecules on the surface of alumina nanoparticles in an alumina/water nanofluid is studied using nuclear magnetic resonance (NMR). The data suggest that a thin ordered layer ( ∼ 1.4 nm) of water molecules surrounds each nanoparticle. This ordered layer increases the nanoparticle effective volumetric fraction; however, the nanofluid thermal conductivity appears to be unaffected by this layer, and in good agreement with Maxwell’s effective medium theory. Furthermore, the NMR data suggest that the nanoparticles do not enhance, but rather stifle micromixing in the base fluid.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
MIT Nuclear Reactor Laboratory
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.3276551
