Direct imaging by atomic force microscopy of surface-localized self-assembled monolayers on a cuprate superconductor and surface X-ray scattering analysis of analogous monolayers on the surface of water

Steen B. Schougaard, Niels Reitzel, Thomas Bjørnholm, Kristian Kjaer, Torben R. Jensen, Olga E. Shmakova, Ramon Colorado, T. Randall Lee, J. H. Choi, John T. Markert, David Derro, Alex de Lozanne, John T. McDevitt

Research output: Contribution to journalArticlepeer-review

Abstract

A self-assembled monolayer of CF3(CF2)3(CH2)11N H2 atop the (001) surface of the high-temperature superconductor YBa2Cu3O7-x was imaged by atomic force microscopy (AFM). The AFM images provide direct 2D-structural evidence for the epitaxial 5.5 Å square √2 × √2R45° unit cell previously predicted for alkyl amines by molecular modeling [J.E. Ritchie, C.A. Wells, J.-P. Zhou, J. Zhao, J.T. McDevitt, C.R. Ankrum, L. Jean, D.R. Kanis, J. Am. Chem. Soc. 120 (1998) 2733]. Additionally, the 3D structure of an analogous Langmuir monolayer of CF3(CF2)9(CH2)11N H2 on water was studied by grazing-incidence X-ray diffraction and specular X-ray reflectivity. Structural differences and similarities between the water-supported and superconductor-localized monolayers are discussed.

Original languageEnglish (US)
Pages (from-to)8424-8429
Number of pages6
JournalThin Solid Films
Volume515
Issue number23
DOIs
StatePublished - Sep 14 2007

Keywords

  • Atomic force microscopy
  • Grazing-incidence X-ray diffraction (GIXD)
  • Self-assembled monolayers (SAMs)
  • Surface composition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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