An Ellipsometric Study of the Adsorption of Gelatin on Silver Bromide
- 1 November 1974
- journal article
- research article
- Published by Taylor & Francis in The Journal of Photographic Science
- Vol. 22 (6) , 279-285
- https://doi.org/10.1080/00223638.1974.11737795
Abstract
Optically-polished surfaces of silver bromide were examined by ellipsometry to establish their optical properties. The adsorption of gelatin onto the surfaces from an aqueous solution at 40° C was then followed ellipsometrically. Measurements were carried out as a function of time and as a function of pH at pBr 3. From the measurements, it was possible to obtain the adsorption excess of the gelatin at the surface, the optical thickness of the adsorbed layer and the concentration of gelatin in the adsorbed layer. The optical thickness of the adsorbed layer was found to vary significantly with pH and to reach a maximum value of ca. 400 A at the isoelectric point of the gelatin.Keywords
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