Browsing by Author "Engelsen, Daan Den"

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    Ellipsometric Investigation of Black Soap Films
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (1-6), 1974) Engelsen, Daan Den; Frens, Gerrit
    Thin soap films of sodium dodecyl sulphate and sodium dodecyl bcnzenesulphonatc have been studied with a combination of ellipsometry and reflectometry. It is demonstrated that an optical three-layer model is superior to a one-layer model for the interpretation of the ellipsometric data. The refractive indices of the film core and the surface layers are determined, and it is found that the index for the surface is higher than that for the film core. The composition of the Newton type of film is discussed on the basis of these data.
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    Ellipsometry of Spread Monolayers: Part 2.—Coloured Systems : Chlorophyll a, Carotenoic Acid, Rhodamine 6G and a Cynanine Dye
    (Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (11), 1974) Engelsen, Daan Den; Koning, Bob De
    Ellipsometric measurements of light-absorbing monomolecular layers are described in this paper. Combination of the ellipsometric results with data from surface pressure studies and absorption spectra leads to a better insight into the structure of the monolayers.