Nanometer-scale mapping of local work function with a photon-assisted STM technique

Yasuo Nakayama, Hiroshi Kondoh, Toshiaki Ohta

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Local work-function mapping has been performed using scanning tunneling microscopy (STM) combined with visible laser light. Spatial distribution of the work function was visualized for inhomogeneous alkali-metal overlayers on a patterned Cu surface in a nanometer scale formed by nitrogen ion implantation. The spatial resolution of this technique is estimated to be in a sub-nanometer range.

Original languageEnglish
Pages (from-to)18-22
Number of pages5
JournalApplied Surface Science
Issue number1-2 SPEC. ISS.
Publication statusPublished - 2005 Feb 28
Externally publishedYes


  • Alkali metals
  • Cu(1 0 0)
  • N implantation
  • Photo-assisted STM
  • Scanning tunneling microscopy
  • Work function

ASJC Scopus subject areas

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


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