Nanoparticle traffic on helical tracks: thermophoretic mass transport through carbon nanotubes |
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Authors: | Schoen Philipp A E Walther Jens H Arcidiacono Salvatore Poulikakos Dimos Koumoutsakos Petros |
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Affiliation: | Laboratory of Thermodynamics in Emerging Technologies, ETH Zurich, CH-8092 Zurich, Switzerland. philipp.schoen@ethz.ch |
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Abstract: | Using molecular dynamics simulations, we demonstrate and quantify thermophoretic motion of solid gold nanoparticles inside carbon nanotubes subject to wall temperature gradients ranging from 0.4 to 25 K/nm. For temperature gradients below 1 K/nm, we find that the particles move "on tracks" in a predictable fashion as they follow unique helical orbits depending on the geometry of the carbon nanotubes. These findings markedly advance our knowledge of mass transport mechanisms relevant to nanoscale applications. |
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