Abstract
TRACER and self-diffusion investigations under electric field of Li+, Na+, K+, Rb+ and Cs+ ions in fused alkali nitrates1, as also in aqueous-agar gel media2, revealed an asymmetry in their spatial distribution following migration: corresponding data for diffusion in the absence of field showed no asymmetry. Present initially as a narrow zone, 2–5 mm. wide, at the origin, the band migrates 30–50 cm. in the field direction, depending on the intensity and the duration of the applied field; the actual displacement of the centre is a measure of the ionic mobility. A plot of the ion concentration as a function of the distance from origin is sensibly Gaussian with a pronounced skew, the arm in the field direction being more precipitous (Fig. 1).
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References
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ARNIKAR, H. An Anisotropy Effect in Diffusion under Electric Field. Nature 194, 271–272 (1962). https://doi.org/10.1038/194271a0
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DOI: https://doi.org/10.1038/194271a0
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