Friction laws for lubricated nanocontacts (Articolo in rivista)

Type
Label
  • Friction laws for lubricated nanocontacts (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.2345369 (literal)
Alternative label
  • R. Buzio; C. Boragno; U. Valbusa (2006)
    Friction laws for lubricated nanocontacts
    in Journal of chemical physics online; AIP, American institute of physics, Melville, NY (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • R. Buzio; C. Boragno; U. Valbusa (literal)
Pagina inizio
  • 094708 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://jcp.aip.org/resource/1/jcpsa6/v125/i9/p094708_s1 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 125 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-INFM Genova, Dipartimento di Fisica, Via Dodecaneso 33, 16146 Genova, Italy; Nanomed Labs, Advanced Biotechnology Center, Largo R. Benzi 10, 16146 Genova, Italy and Dipartimento di Fisica, Università degli Studi di Genova, Via Dodecaneso 33, 16146 Genova, Italy; Nanomed Labs, Advanced Biotechnology Center, Largo R. Benzi 10, 16146 Genova, Italy and Dipartimento di Fisica, Università degli Studi di Genova, Via Dodecaneso 33, 16146 Genova, Italy; (literal)
Titolo
  • Friction laws for lubricated nanocontacts (literal)
Abstract
  • We have used friction force microscopy to probe friction laws for nanoasperities sliding on atomically flat substrates under controlled atmosphere and liquid environment, respectively. A power law relates friction force and normal load in dry air, whereas a linear relationship, i.e., Amontons' law, is observed for junctions fully immersed in model lubricants, namely, octamethylciclotetrasiloxane and squalane. Lubricated contacts display a remarkable friction reduction, with liquid and substrate specific friction coefficients. Comparison with molecular dynamics simulations suggests that load-bearing boundary layers at junction entrance cause the appearance of Amontons' law and impart atomic-scale character to the sliding process; continuum friction models are on the contrary of limited predictive power when applied to lubrication effects. An attempt is done to define general working conditions leading to the manifestation of nanoscale lubricity due to adsorbed boundary layers. (literal)
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