Successive change in work function of Al exposed to air

M. Uda*, Y. Nakagawa, T. Yamamoto, M. Kawasaki, A. Nakamura, T. Saito, K. Hirose

*この研究の対応する著者

研究成果: Article査読

21 被引用数 (Scopus)

抄録

Aluminum surface freshly shaven with a steel knife showed significant changes in work functions from 3.25 to 3.60 eV within one day. Successive changes of the work functions were measured in air using the open counter. XPS spectra showed no change fundamentally when the fresh Al surface was exposed to air for 1 min and 24 h. Molecular orbital calculations by use of the DV-X α method predicted an appearance of an additional local density of state near the Fermi edge when an Al-Al distance becomes large. Based on the experimental results and calculations, we proposed formation of an interface between an Al matrix and a surface oxide or oxyhydroxide, which has a stress induced density of state. This state appears at the beginning of air exposure and disappears after the lapse of time because such stress is released after rearrangement of surface and interface structures.

本文言語English
ページ(範囲)767-771
ページ数5
ジャーナルJournal of Electron Spectroscopy and Related Phenomena
88-91
出版ステータスPublished - 1998 3 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 放射線
  • 原子分子物理学および光学
  • 凝縮系物理学
  • 分光学
  • 物理化学および理論化学

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