ePubs

The open archive for STFC research publications

Full Record Details

Persistent URL http://purl.org/net/epubs/work/30272
Record Status Checked
Record Id 30272
Title The distribution of hydroxyl ions at the surface of anodic alumina
Contributors
Abstract Barrier-type anodic films 3-15 nm thick have been formed on electropolished 99.999% aluminium. Variable-angle XPS has been used to identify a significant proportion of hydroxyl ions at the surface of the relatively compact alumina films. The location of an oxygen-rich region at the outer surface of the oxide has been confirmed by medium-energy ion scattering (MEIS). Combining the information from these two techniques leads to the conclusion that a hydroxyl-containing surface region is responsible for this oxygen-rich surface layer, MEIS revealing an approximately linear relationship between the total oxide thickness and the thickness of the hydroxyl-rich surface region. From consideration of the mechanisms of amorphous alumina formation by ionic transport, with incorporation of electrolyte-derived species into the thickening film, the generation of the hydroxyl-rich outermost region is considered to result from the formation of gel-like material at the film/electrolyte interface.
Organisation CCLRC , SND , MEIS
Keywords
Funding Information
Related Research Object(s):
Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article Surf. Inter. Anal. 35, no. 8 (2003): 649-657. doi:10.1002/sia.1585 2003
Showing record 1 of 1
RCUK
Science and Technology Facilities Council Switchboard: 01793 442000