Header menu link for other important links
Effect of carbon chain length on the dynamics of heat transfer at a gold/hydrocarbon interface: Comparison of simulation with experiment
, J.A. Carter, D.D. Dlott, W.L. Hase
Published in
Volume: 115
Issue: 19
Pages: 9622 - 9628
In a previous article (Phys. Chem. Chem. Phys.2010, 12, 4435), nonequilibrium molecular dynamics (MD) simulations of heat transfer from a hot Au{111} substrate to an alkylthiolate self-assembled monolayer (H-SAM) were presented. The simulations were performed for an H-SAM chain length of eight carbon atoms, and a qualitative agreement with the experiments of Wang et al. (Science2007, 317, 787) was found. Here, simulation results are presented for heat transfer to H-SAM surfaces with carbon chain lengths of 10-20 carbon atoms. Relaxation times for heat transfer are extracted, compared with experiment, and a qualitative agreement is obtained. The same relaxation time is found from either the temperature of the H-SAM or the orientational disorder of the H-SAM versus time. For a simulation model with the Au substrate thermally equilibrated, the relaxation times determined from the simulations are approximately a factor of 4 larger than the experimental values. © 2011 American Chemical Society.
About the journal
JournalJournal of Physical Chemistry C