THE ROLE OF ADSORPTION IN HETEROGENEOUS NUCLEATION, II: THE ADSORPTION OF WATER VAPOR ON PHOTOLYZED SILVER IODIDE

S. J. Birstein Air Force Cambridge Research Center

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Abstract

Studies have been made of the adsorption of water vapor on photolyzed silver iodide. Adsorption isotherms, run at +20 and −20C, have been compared with the isotherms of water vapor on unphotolyzed silver iodide at the same temperatures. It has been found that, while water on silver iodide gives a type III isotherm characterized by extremely high multilayer adsorption, as the silver iodide is photolyzed and its nucleating ability destroyed, water adsorption is greatly diminished.

Abstract

Studies have been made of the adsorption of water vapor on photolyzed silver iodide. Adsorption isotherms, run at +20 and −20C, have been compared with the isotherms of water vapor on unphotolyzed silver iodide at the same temperatures. It has been found that, while water on silver iodide gives a type III isotherm characterized by extremely high multilayer adsorption, as the silver iodide is photolyzed and its nucleating ability destroyed, water adsorption is greatly diminished.

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