Collective excitations in liquid D-2 confined within the mesoscopic pores of a MCM-41 molecular sieve (Articolo in rivista)

Type
Label
  • Collective excitations in liquid D-2 confined within the mesoscopic pores of a MCM-41 molecular sieve (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.73.094206 (literal)
Alternative label
  • C. Mondelli; M.A. Gonzalez; F. Albergamo; C. Carbajo; M.J. Torralvo; E. Enciso; F. J. Bermejo; R. Fernandez-Perea; C. Cabrillo; V. Leon, M.L. Saboungi (2006)
    Collective excitations in liquid D-2 confined within the mesoscopic pores of a MCM-41 molecular sieve
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • C. Mondelli; M.A. Gonzalez; F. Albergamo; C. Carbajo; M.J. Torralvo; E. Enciso; F. J. Bermejo; R. Fernandez-Perea; C. Cabrillo; V. Leon, M.L. Saboungi (literal)
Pagina inizio
  • 94206 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 73 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • INFM-OGG Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France European Synchrotron Radiat Facil, F-38043 Grenoble, France Univ Complutense, Fac Ciencias Quim, Dept Quim Inorgan, E-28040 Madrid, Spain Univ Complutense, Fac Ciencias Quim, Dept Quim Fis 1, E-28040 Madrid, Spain Univ Basque Country, Dept Elect & Elect, CSIC, Bilbao 48080, Spain CSIC, Inst Estructura Mat, E-28006 Madrid, Spain 7. Ctr Rech Mat Divisee, F-45071 Orleans 2, France (literal)
Titolo
  • Collective excitations in liquid D-2 confined within the mesoscopic pores of a MCM-41 molecular sieve (literal)
Abstract
  • We present a comparative study of the excitations in bulk and liquid D-2 confined within the pores of MCM-41. The material (Mobile Crystalline Material-41) is a silicate obtained by means of a template that yields a partially crystalline structure composed by arrays of nonintersecting hexagonal channels of controlled width having walls made of amorphous SiO2. Its porosity was characterized by means of adsorption isotherms and found to be composed by a regular array of pores having a narrow distribution of sizes with a most probable value of 2.45 nm. The assessment of the precise location of the sample within the pores is carried out by means of pressure isotherms. The study was conducted at two pressures which correspond to pore fillings above the capillary condensation regime. Within the range of wave vectors where collective excitations can be followed up (0.3 <= Q <= 3.0 angstrom(-1)), we found confinement brings forward a large shortening of the excitation lifetimes that shifts the characteristic frequencies to higher energies. In addition, the coherent quasielastic scattering shows signatures of reduced diffusivity. (literal)
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