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. © 2009 The American Physical Society.
Registro:
Documento: |
Artículo
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Título: | Helium on planar and nanostructured alkali-metal surfaces |
Autor: | Ancilotto, F.; Barranco, M.; Hernández, E.S.; Hernando, A.; Pi, M. |
Filiación: | Dipartimento di Fisica G. Galilei, Università di Padova, via Marzolo 8, I-35131 Padova, Italy DEMOCRITOS National Simulation Center, I-34014 Trieste, Italy Departament d'Estructura i Constituents de la Matèria, Facultat de Física, Universitat de Barcelona, 08028 Barcelona, Spain Departamento de Física, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, RA-1428 Buenos Aires, Argentina
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Año: | 2009
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Volumen: | 79
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Número: | 10
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DOI: |
http://dx.doi.org/10.1103/PhysRevB.79.104514 |
Título revista: | Physical Review B - Condensed Matter and Materials Physics
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Título revista abreviado: | Phys. Rev. B Condens. Matter Mater. Phys.
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ISSN: | 10980121
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CODEN: | PRBMD
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10980121_v79_n10_p_Ancilotto |
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Citas:
---------- APA ----------
Ancilotto, F., Barranco, M., Hernández, E.S., Hernando, A. & Pi, M.
(2009)
. Helium on planar and nanostructured alkali-metal surfaces. Physical Review B - Condensed Matter and Materials Physics, 79(10).
http://dx.doi.org/10.1103/PhysRevB.79.104514---------- CHICAGO ----------
Ancilotto, F., Barranco, M., Hernández, E.S., Hernando, A., Pi, M.
"Helium on planar and nanostructured alkali-metal surfaces"
. Physical Review B - Condensed Matter and Materials Physics 79, no. 10
(2009).
http://dx.doi.org/10.1103/PhysRevB.79.104514---------- MLA ----------
Ancilotto, F., Barranco, M., Hernández, E.S., Hernando, A., Pi, M.
"Helium on planar and nanostructured alkali-metal surfaces"
. Physical Review B - Condensed Matter and Materials Physics, vol. 79, no. 10, 2009.
http://dx.doi.org/10.1103/PhysRevB.79.104514---------- VANCOUVER ----------
Ancilotto, F., Barranco, M., Hernández, E.S., Hernando, A., Pi, M. Helium on planar and nanostructured alkali-metal surfaces. Phys. Rev. B Condens. Matter Mater. Phys. 2009;79(10).
http://dx.doi.org/10.1103/PhysRevB.79.104514