Hydrogen adsorption on (110) tungsten at 30 k: an atom-probe field-ion microscope study

A. T. Macrander*, D. N. Seidman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Adsorption of hydrogen on [110] oriented tungsten specimens has been studied via field desorption in an atom-probe field-ion microscope. Adsorption was studied on surfaces prepared by field evaporation. Typically, hydrogen field desorption events were exhausted after seven tungsten (110) planes had been field evaporated. Exposures were controlled by applying a potential to the specimen which was sufficient to field ionize hydrogen gas molecules approaching the specimen and which thereby prevented additional hydrogen from being adsorbed. An adsorption model which invokes sticking at step sites but not at plane sites is proposed to explain the coverage data.

Original languageEnglish (US)
Pages (from-to)451-465
Number of pages15
JournalSurface Science
Volume147
Issue number2-3
DOIs
StatePublished - Nov 3 1984

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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