Helium on planar and nanostructured alkali-metal surfaces (Articolo in rivista)

Type
Label
  • Helium on planar and nanostructured alkali-metal surfaces (Articolo in rivista) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.79.104514 (literal)
Alternative label
  • Ancilotto, F;Barranco, M; Hernandez, ES; Hernando, A ; Pi, M (2009)
    Helium on planar and nanostructured alkali-metal surfaces
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Ancilotto, F;Barranco, M; Hernandez, ES; Hernando, A ; Pi, M (literal)
Pagina inizio
  • 104514 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 79 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy and DEMOCRITOS Natl Simulat Ctr, I-34014 Trieste, Italy Univ Barcelona, Fac Fis, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain Univ Barcelona, IN2UB, E-08028 Barcelona, Spain Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Consejo Nacl Invest Cient & Tecn, RA-1428 Buenos Aires, DF, Argentina (literal)
Titolo
  • Helium on planar and nanostructured alkali-metal surfaces (literal)
Abstract
  • We investigate the effects (on the wetting characteristics of helium below 3 K) of tailoring an alkali-metal surface by incorporating a regular array of nanoscopic indentations. We establish the prewetting line of helium on semi-infinite planar Cs up to 3 K in the frame of a finite-range temperature-dependent density-functional theory, and examine the modifications introduced in the isotherms when the substrate is covered with a periodic lattice of parabolic cavities. We show that, both for the planar and nanostructured surfaces, the unstable regions of the isotherms are stabilized by nucleation of drops and/or bubbles. Results corresponding to nonwettable Cs surfaces are compared with those obtained both for planar and nanopatterned Na substrates, where wetting at zero temperature is instead expected to occur, for a planar surface, preceded by a first-order prewetting transition. (literal)
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