Selective photobleaching of (-Ag-O-) strings on the Ag(110) surface

Yuji Matsumoto, Yuji Okawa, Kenji Suzuki, Kozo Mukai, Ken Ichi Tanaka

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A p(2 x 3)-N Ag(110) surface obtained by N+ and/or N2+ ion bombardment gave a desorption peak of N2 at 530 K. When this p(2 x 3)-N Ag(110) surface was exposed to O2 at room temperature, the LEED pattern showed a combined structure of [p(2x 3)-N + p(2 x 1)-O]. The STM image proved the growth of the (-Ag-O-) and (Ag2N) strings in the [001] and [110] directions, respectively. The TPD spectrum of the combined surface gave the desorption of N2 at 530 K, NO at 490-520 K, and O2 at 600 K. When this [p(2 x 3)-N + p(2 x 1)-O] Ag(110) surface was illuminated with a UV light at room temperature, the (-Ag-O-) strings in the STM image were selectively erased although the (Ag2N) underwent little influence, and the LEED pattern changed to the p(2 x 3)-N structure. The TPD spectrum of the surface after the illumination gave only N2. These results indicate that surface migration of N atoms triggers the reaction between N and N yielding N2 as well as N and O yielding NO on the surface. Selective photobleaching for the combined structure may suggest a feasibility of atomic scale lithography of the surface by using photochemical reactions.

Original languageEnglish
Pages (from-to)9676-9679
Number of pages4
JournalJournal of the American Chemical Society
Volume118
Issue number40
DOIs
Publication statusPublished - 1996 Oct 9
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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