Srivastava, V. K. ; Verma, Ajit Ram (1962) Multiple beam interferometric study of 'Built-up' films of barium stearate Proceedings of the Physical Society, 80 (1). pp. 222-225. ISSN 0370-1328
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Official URL: http://iopscience.iop.org/0370-1328/80/1/325
Related URL: http://dx.doi.org/10.1088/0370-1328/80/1/325
Abstract
A direct determination of the metrical thickness of mono- and multi-molecular films of barium stearate has been carried out with the use of multiple beam interferometry. The thickness of the unimolecular film, as obtained from measurements on a four-layer film, is 25.7 ± 0.3 Å which is in excellent agreement with the length of the molecular chain of barium stearate (=25.75 ± 0.25 Å ) as obtained from Fankuchen's X-ray data. The technique employed eliminates differential phase change effects and does not involve the refractive index of the films. The result confirms the monomolecular spreading of stearic acid on a water surface.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| ID Code: | 70046 |
| Deposited On: | 19 Nov 2011 10:37 |
| Last Modified: | 19 Nov 2011 10:37 |
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