Field electron emission from molybdenum platinum alloy tips

Megumi Nakajima; Wataru Ito; Boklae Cho; Chuhei Oshima

doi:10.1002/sia.4809

Field electron emission from molybdenum platinum alloy tips

Megumi Nakajima^*, Wataru Ito, Boklae Cho, Chuhei Oshima

^*Corresponding author for this work

Waseda University

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

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 language	English
Pages (from-to)	644-646
Number of pages	3
Journal	Surface and Interface Analysis
Volume	44
Issue number	6
DOIs	https://doi.org/10.1002/sia.4809
Publication status	Published - 2012 Jun

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

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10.1002/sia.4809

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title = "Field electron emission from molybdenum platinum alloy tips",

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.",

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author = "Megumi Nakajima and Wataru Ito and Boklae Cho and Chuhei Oshima",

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T1 - Field electron emission from molybdenum platinum alloy tips

AU - Nakajima, Megumi

AU - Ito, Wataru

AU - Cho, Boklae

AU - Oshima, Chuhei

PY - 2012/6

Y1 - 2012/6

N2 - 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.

AB - 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.

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KW - FES

KW - FIM

KW - molybdenum platinum (Mo-Pt) alloy

KW - single-atom termination

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Field electron emission from molybdenum platinum alloy tips

Abstract

Keywords

ASJC Scopus subject areas

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