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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 36,
  • Issue 4,
  • pp. 471-473
  • (1982)

Application of Raman Spectroscopy to the Study of Adsorption Effects at Liquid-Solid Interfaces

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Abstract

A sample cell for investigating suspensions or emulsions by Raman spectroscopy in the optically favorable 90° scattering arrangement is described. The Raman spectra of pyridine in a suspension of Aerosil 200 in carbon tetrachloride are recorded. The adsorption isotherm of pyridine is determined from the intensities of the Raman lines at 1008 and 990 cm<sup>−1</sup>. Over a long range of coverage a linear relationship exists between reciprocal concentrations of chemisorbed and dissolved molecules. The minimal surface area that is occupied by a chemisorbed molecule is determined to be approximately 0.75 nm<sup>2</sup>.

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