Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 767-771 |
| Number of pages | 5 |
| Journal | Journal of Electron Spectroscopy and Related Phenomena |
| Volume | 88-91 |
| Publication status | Published - 1998 Mar |
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Keywords
- Al
- AlO(OH)
- Interface
- Molecular orbital calculation
- Surface
- Work function
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Spectroscopy
- Atomic and Molecular Physics, and Optics
- Surfaces and Interfaces
Cite this
Successive change in work function of Al exposed to air. / Uda, M.; Nakagawa, Y.; Yamamoto, Tomoyuki; Kawasaki, M.; Nakamura, A.; Saito, T.; Hirose, K.
In: Journal of Electron Spectroscopy and Related Phenomena, Vol. 88-91, 03.1998, p. 767-771.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Successive change in work function of Al exposed to air
AU - Uda, M.
AU - Nakagawa, Y.
AU - Yamamoto, Tomoyuki
AU - Kawasaki, M.
AU - Nakamura, A.
AU - Saito, T.
AU - Hirose, K.
PY - 1998/3
Y1 - 1998/3
N2 - 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.
AB - 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.
KW - Al
KW - AlO(OH)
KW - Interface
KW - Molecular orbital calculation
KW - Surface
KW - Work function
UR - http://www.scopus.com/inward/record.url?scp=0042138331&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042138331&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0042138331
VL - 88-91
SP - 767
EP - 771
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
SN - 0368-2048
ER -