Water- and alcohol-soluble AuPd nanoparticles have been investigated to determine the effect of the organic stabilizing group on the thermal conductance G of the particle/fluid interface. The thermal decays of tioproninstabilized 3-5-nm diameter AuPd alloy nanoparticles, thioalkylated ethylene glycol-stabilized 3-5-nm diameter AuPd nanoparticles, and cetyltrimethylammonium bromide-stabilized 22-nm diameter Au-core/AuPd-shell nanoparticles give thermal conductances G ≈ 100-300 MW m -2 K -1 for the particle/water interfaces, approximately an order of magnitude larger than the conductance of the interfaces between alkanethiolterminated AuPd nanoparticles and toluene. The similar values of G for particles ranging in size from 3 to 24 nm with widely varying surface chemistry indicate that the thermal coupling between AuPd nanoparticles and water is strong regardless of the self-assembled stabilizing group.

Original languageEnglish (US)
Pages (from-to)18870-18875
Number of pages6
JournalJournal of Physical Chemistry B
Issue number49
StatePublished - Dec 9 2004

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry


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