Noble metal/W(111) single-atom tips and their field electron and ion emission characterises

Hong Shi Kuo, Ing Shouh Hwang, Tsu Yi Fu, Yu Chun Lin, Che Cheng Chang, Tien T. Tsong

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

We have developed a simple, reliable and reproducible method for preparing single-atom tips. With electrochemical techniques, a very small amount of a noble metal is plated on the surface of a clean W(111) tip. Upon annealing the tip at an appropriate temperature in vacuum, a three-sided {211} pyramid with a single-atom sharpness is formed spontaneously at the tip apex by adsorbate-induced faceting. This tip is both thermally and chemically stable, and can be regenerated several ten times when accidentally damaged. We use a field ion microscope to examine the atomic structure of the tip apex layer by layer and characterize the corresponding electron emission in the field emission mode. Some properties of Ne+ ions emitted from a single-atom tip are also measured, indicating a high brightness and a small extension angle. Many desirable features make the single-atom tips very promising for future particle beam applications in nanoscience and nanotechnology.

Original languageEnglish
Pages (from-to)8972-8983
Number of pages12
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number11
DOIs
Publication statusPublished - 2006 Nov 15

Fingerprint

ion emission
Precious metals
noble metals
electron emission
field emission
Atoms
Electrons
Ions
atoms
Ion microscopes
Nanoscience
Particle beams
Electron emission
Adsorbates
Nanotechnology
Field emission
Luminance
apexes
Vacuum
Annealing

Keywords

  • Adsorbate-induced faceting
  • Electron field emission
  • Field ion beams
  • Single-atom tips

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Noble metal/W(111) single-atom tips and their field electron and ion emission characterises. / Kuo, Hong Shi; Hwang, Ing Shouh; Fu, Tsu Yi; Lin, Yu Chun; Chang, Che Cheng; Tsong, Tien T.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 45, No. 11, 15.11.2006, p. 8972-8983.

Research output: Contribution to journalArticle

Kuo, Hong Shi ; Hwang, Ing Shouh ; Fu, Tsu Yi ; Lin, Yu Chun ; Chang, Che Cheng ; Tsong, Tien T. / Noble metal/W(111) single-atom tips and their field electron and ion emission characterises. In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 2006 ; Vol. 45, No. 11. pp. 8972-8983.
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AU - Chang, Che Cheng

AU - Tsong, Tien T.

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