Gold Clusters Sliding on Graphite: a Possible Quartz Crystal Microbalance Experiment?

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dc.creatorPisov, Stoyan
dc.creatorTosatti, Erio
dc.creatorTartaglino, Ugo
dc.creatorVanossi, Andrea
dc.date2007-02-16
dc.date2007-07-14
dc.date.accessioned2026-07-07T08:17:25Z
dc.date.available2026-07-07T08:17:25Z
dc.descriptionA large measured 2D diffusion coefficient of gold nanoclusters on graphite has been known experimentally and theoretically for about a decade. When subjected to a lateral force, these clusters should slide with an amount of friction that could be measured. We examine the hypothetical possibility to measure by Quartz Crystal Microbalance (QCM) the phononic sliding friction of gold clusters in the size range around 250 atoms on a graphite substrate between 300 and 600 K. Assuming the validity of Einstein's relations of ordinary Brownian motion and making use of the experimentally available activated behavior of the diffusion coefficients, we can predict the sliding friction and slip times as a function of temperature. It is found that a prototypical deposited gold cluster could yield slip times in the standard measurable size of 10^(-9) sec for temperatures around 450-500 K, or 200 C. Since gold nanoclusters may also melt around these temperatures, QCM would offer the additional chance to observe this phenomenon through a frictional change.
dc.description5 pages, 3 figures. Published. Minimal changes with respect to the previous version
dc.identifierhttps://arxiv.org/abs/cond-mat/0702389
dc.identifierhttp://arxiv.org/abs/cond-mat/0702389
dc.identifierJ. Phys.: Condens. Matter 19 (2007) 305015
dc.identifierdoi:10.1088/0953-8984/19/30/305015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/134084
dc.subjectMaterials Science
dc.titleGold Clusters Sliding on Graphite: a Possible Quartz Crystal Microbalance Experiment?
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