Field electron emission from molybdenum platinum alloy tips

Megumi Nakajima, Wataru Ito, Boklae Cho, Chuhei Oshima

Research output: Contribution to journalArticle

Abstract

Through annealing at 900-1000 K under ultrahigh vacuum, a nanopyramid terminated by a single atom was spontaneously grown on a Mo-Pt alloy tip surface. We observed single-atom termination of the pyramid by field ion microscopy and detected its characteristic features by field emission spectroscopy. Mo95%-Pt5% alloy tips were fabricated into single-atom terminated pyramids at a higher success rate than were Mo99%-Pt1% alloy tips, strongly suggesting that Pt segregation at the tip surface was crucial for single-atom termination. In addition, we found the Mo95%-Pt5% alloy tips to be self-repairing and demountable, which are common properties in single-atom termination of body-centered cubic metal tips covered with a face-centered cubic material.

Original languageEnglish
Pages (from-to)644-646
Number of pages3
JournalSurface and Interface Analysis
Volume44
Issue number6
DOIs
Publication statusPublished - 2012 Jun

Fingerprint

molybdenum alloys
Platinum alloys
platinum alloys
Molybdenum alloys
Electron emission
electron emission
field emission
Atoms
atoms
pyramids
Emission spectroscopy
Ultrahigh vacuum
Field emission
Microscopic examination
ultrahigh vacuum
Metals
maintenance
Annealing
Ions
microscopy

Keywords

  • FEM
  • FES
  • FIM
  • molybdenum platinum (Mo-Pt) alloy
  • single-atom termination

ASJC Scopus subject areas

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

Cite this

Field electron emission from molybdenum platinum alloy tips. / Nakajima, Megumi; Ito, Wataru; Cho, Boklae; Oshima, Chuhei.

In: Surface and Interface Analysis, Vol. 44, No. 6, 06.2012, p. 644-646.

Research output: Contribution to journalArticle

Nakajima, M, Ito, W, Cho, B & Oshima, C 2012, 'Field electron emission from molybdenum platinum alloy tips', Surface and Interface Analysis, vol. 44, no. 6, pp. 644-646. https://doi.org/10.1002/sia.4809
Nakajima, Megumi ; Ito, Wataru ; Cho, Boklae ; Oshima, Chuhei. / Field electron emission from molybdenum platinum alloy tips. In: Surface and Interface Analysis. 2012 ; Vol. 44, No. 6. pp. 644-646.
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