The Field Ion Microscopy of Gold. I. Hydrogen Promoted Field Evaporation - Experimental Results,

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Abstract:

A systematic study of the effect of hydrogen gas on the field evaporation characteristics of gold field ion microscope FIM specimens has been performed. The dependence of the field evaporation rate on hydrogen gas pressure, tip temperature, electric field strength, and time has been measured for the central axially symmetric 001 plane. There was no value of electric field strength at which FIM images of gold specimens were stable in the presence of hydrogen gas. Electron microscope observations of the hydrogen etched specimens indicated that the radius of curvature on the 001 region has a tendency to blunt, and that this tendency increased with increased hydrogen promoted field evaporation and temperature. Modified author abstract

Author(s):
Ast, D. G. ; Seidman, D. N.
Author Organization(s):
CORNELL UNIV ITHACA N Y MATERIALS SCIENCE CENTER
Supplementary Note:
Sponsored in part by Advanced Research Projects Agency.
Pagination:
0042

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
MSC-1322, NYO-3504-39
Contract/Grant Number(s):
AT(30-1)-3504
Monitor Series:
3504-39
 Subject Terms
Communities of Interest:
Air Platforms
Descriptor(s):
(*GOLD, *ELECTRON MICROSCOPY), FIELD EMISSION, HYDROGEN, EVAPORATION, ETCHING
Field(s)/Group(s):
Physical Chemistry
Keyword(s):
*FIELD ION MICROSCOPY
Report Date:
1970 Feb 24