Observation of HOPG by STM and contact AFM in various gas atmospheres under pressures up to 1.1 MPa

Yasumasa Suzuki, Hirotoshi Enoki, Etsuo Akiba

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4 Citations (Scopus)

Abstract

Apparatus comprising a scanning tunneling microscopy (STM) and an atomic force microscopy (AFM) has been developed for use under supra-atmospheres. Observations of highly oriented pyrolytic graphite (HOPG) were carried out by STM and contact AFM operating in air and various gas atmospheres (hydrogen, helium, neon and argon) under pressures up to 1.1 MPa. Atomic resolution images of the HOPG were obtained by STM in all the gas atmospheres studied. However, it was found that the presence of water vapor gave rise to a noise current at increased pressures. Using contact AFM, the atomic resolution in an argon atmosphere decreased with increasing pressure, while atomic images were obtained under the other gas atmospheres at 1.1 MPa.

Original languageEnglish
Pages (from-to)226-232
Number of pages7
JournalUltramicroscopy
Volume104
Issue number3-4
DOIs
Publication statusPublished - Oct 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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