Gold clusters sliding on graphite: a possible quartz crystal microbalance experiment? (Articolo in rivista)

Type
Label
  • Gold clusters sliding on graphite: a possible quartz crystal microbalance experiment? (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Pisov, S; Tosatti, E; Tartaglino, U; Vanossi, A (2007)
    Gold clusters sliding on graphite: a possible quartz crystal microbalance experiment?
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Pisov, S; Tosatti, E; Tartaglino, U; Vanossi, A (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 19 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ICTP, I-34014 Trieste, Italy; Univ Sofia, Dept Atom Phys, Sofia 1164, Bulgaria; SISSA, I-34014 Trieste, Italy; Democritos, I-34014 Trieste, Italy; Univ Modena & Reggio Emilia, CNR, INFM, Natl Res Ctr S3, I-41100 Modena, Italy; Univ Modena & Reggio Emilia, Dept Phys, I-41100 Modena, Italy (literal)
Titolo
  • Gold clusters sliding on graphite: a possible quartz crystal microbalance experiment? (literal)
Abstract
  • A large measured two-dimensional (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 can be measured. We examine the hypothetical possibility of measuring 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 behaviour 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 at the standard measurable size of 10(-9) s for temperatures around 450-500 K, or 200 degrees C. Since gold nanoclusters may also melt at around these temperatures, QCM could offer the additional chance of observing this phenomenon through a frictional change. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Autore CNR di
Prodotto
Insieme di parole chiave di
data.CNR.it