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

A. T. Macrander; D. N. Seidman

doi:10.1016/0039-6028(84)90466-7

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

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 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 language	English (US)
Pages (from-to)	451-465
Number of pages	15
Journal	Surface Science
Volume	147
Issue number	2-3
DOIs	https://doi.org/10.1016/0039-6028(84)90466-7
State	Published - Nov 3 1984

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Condensed Matter Physics
Surfaces and Interfaces

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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.",

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N2 - 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.

AB - 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.

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