Helium diffraction study of pentacene films on Au(111)

ALBAYRAK E., DANIŞMAN M. F.

APPLIED SURFACE SCIENCE, vol.295, pp.54-58, 2014 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 295
  • Publication Date: 2014
  • Doi Number: 10.1016/j.apsusc.2014.01.003
  • Journal Name: APPLIED SURFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.54-58
  • Keywords: Pentacene, Organic semiconductors, Helium diffraction, Supersonic molecular beam deposition, Au(111) surface, Quartz crystal microbalance, Quartz crystal resonance frequency shift, SCANNING-TUNNELING-MICROSCOPY, THIN-FILMS, GROWTH
  • Middle East Technical University Affiliated: Yes

Abstract

Here we present a helium atom diffraction study of pentacene films on Au(1 1 1) surface prepared by supersonic molecular beam deposition. Though investigated parameter space was limited no significant difference between the films prepared by different deposition energies was observed. Completion of monolayer coverage was confirmed by simultaneous helium scattering and quartz crystal resonance frequency shift measurements during pentacene film growth on the gold electrode of a quartz resonator. Monolayer films were found to adopt a (6 x 3) unit cell which was also observed for pentacene monolayers on Ag(1 1 1). However no ordered multilayer film structure could be observed which is in contrast with the previous Ag(1 1 1) studies. (C) 2014 Elsevier B. V. All rights reserved.