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Determination of the Absolute Density of Fe3+ and Ni2+ Ions in Langmuir-Blodgett Films

✍ Scribed by Faldum, T.; Meisel, W.; G�tlich, P.

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
512 KB
Volume
24
Category
Article
ISSN
0142-2421

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✦ Synopsis

By means of the Langmuir-Blodgett (LB) technique, mono-aud multilayers of Ni'+ and Fe3+ containing fatty acid salts are transferred onto silicon wafers. After thermal treatment, oxidic layers can be produced.

The absolute amounts of Fe3+ and Ni2+ ions per monolayer of LB film were measured and calculated by three different methods. In the case of nickel, the amount expected from ,theory and preparation conditions was obtained experimentally. In contrast, about twice the number of Fe3+ ions as expected is transferred. An explanation can be given by the presence of hydroxide groups bound to iron.

The mean film thickness of the oxidic layers after thermal treatment was estimated where the thicknesses were found to be t l nm.

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