THERMIONIC EMISSION BY SOLUTIONS OF SOLVATED ELECTRONS

Solutions of solvated electrons (generated by dissolution of sodium) in hexamethylphosphoric triamide in a nitrogen atmosphere exhibit thermionic emission. This process was established on three counts: near perfect rectification at the solution-gas interface; measurement of the drift velocity of cha...

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Bibliographic Details
Main Authors: Baron,Bill, Delahay,Paul, Lugo,Roberto
Format: Report
Language:English
Subjects:
ELECTRONS
HEMPA COMPOUND
Physical Chemistry
SODIUM
SOLVATES
SOLVATION
THERMIONIC EMISSION
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Summary:Solutions of solvated electrons (generated by dissolution of sodium) in hexamethylphosphoric triamide in a nitrogen atmosphere exhibit thermionic emission. This process was established on three counts: near perfect rectification at the solution-gas interface; measurement of the drift velocity of charge carrier in the gas between solution and collector; analysis of electrical conduction in the gas phase. Measured currents were corrected for the Schottky effect and for back scattering of electrons in the gas phase. Changes in surface potential of less than 0.1 V, for two simple limiting cases, account for experimental results. The temperature dependence of current yielded an energy of 1.0 eV. This energy includes the work function and contributions from solution and interfacial equilibria. Techniques are described, and ancillary measurements of solution conductivity are reported. (Author)