Field electron emission from molybdenum platinum alloy tips | Zendy

Nakajima Megumi | Zendy; Ito Wataru | Zendy; Cho Boklae | Zendy; Oshima Chuhei | Zendy

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Field electron emission from molybdenum platinum alloy tips

Author(s) -

Nakajima Megumi,

Ito Wataru,

Cho Boklae,

Oshima Chuhei

Publication year - 2012

Publication title -

surface and interface analysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.52

H-Index - 90

eISSN - 1096-9918

pISSN - 0142-2421

DOI - 10.1002/sia.4809

Subject(s) - alloy , field electron emission , annealing (glass) , atom (system on chip) , molybdenum , materials science , metal , pyramid (geometry) , crystallography , chemistry , electron , nanotechnology , metallurgy , optics , physics , computer science , embedded system , quantum mechanics

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. Copyright © 2011 John Wiley & Sons, Ltd.

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