Surface Potential at the Gas–Nonaqueous Solution Interface

Parfenyuk, V. I.
July 2004
Colloid Journal;Jul/Aug2004, Vol. 66 Issue 4, p466
Academic Journal
Data on the values of surface potential at the gas–liquid interface are reviewed and analyzed for a number of organic solvents (saturated alcohols, from methanol to n-butanol; acetone, acetonitrile, dimethylformamide, and dimethyl sulfoxide). The values obtained by different methods are compared with similar values calculated based on the method of Volta-potential difference. It is shown that the solvents studied are characterized by the negative values of surface potential in contrast to water having positive potential (+0.1 V). Negative sign of surface potential for the studied organic liquids confirms that their dipoles are oriented by the positive pole toward the gaseous phase, whereas by their negative pole, toward the liquid phase.


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