The surface potential of the Si nanostructure on a Si (1 1 1) 7 × 7 surface generated by contact of a cantilever tip

T. Shiota, K. Nakayama

Research output: Contribution to journalArticle

4 Citations (Scopus)


A Si microstructure on a Si (1 1 1) 7 × 7 surface was investigated by a noncontact atomic force microscopy (ncAFM) and a scanning Kelvin probe microscopy (SKPM) in ultra high vacuum. The Si microstructure was generated by intermittent contact of a cantilever tip. It was found by the ncAFM and SKPM observations that the Si mound with a height of 1 Å and a width of 30 nm was generated, and the surface potential of the small mound was 0.1 V lower than that of the 7 × 7 domain. A quenched Si (1 1 1) surface was also observed by the ncAFM and SKPM. The differences in height and potential between the reconstructed 7 × 7 and the disordered 1 × 1 domains were about 1 Å and 0.1 V, respectively. Therefore, it was concluded that there appeared the disordered 1 × 1 structure on the surface of the Si small mound, lowering the surface potential by 0.1 V.

Original languageEnglish
Pages (from-to)218-222
Number of pages5
JournalApplied Surface Science
Issue number3-4
Publication statusPublished - Dec 30 2002
Externally publishedYes



  • Contact
  • Nanostructure
  • SKPM
  • Si (1 1 1)
  • Surface potential
  • ncAFM

ASJC Scopus subject areas

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

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