Investigation of the effect of oxygen impurities on the wetting properties of alkali metal surfaces by liquid helium
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- Demolder, B., Raad, F. & Dupont-Roc, J. J Low Temp Phys (1995) 101: 337. doi:10.1007/BF00753317
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The weak binding properties of heavy alkali metal surfaces for helium have been related to their metallic nature and their particularly small work function. A natural consequence would be that oxidized surfaces should loose their non wetting properties for liquid helium. It is pointed out that the special oxidization process of these metals could unexpectedly lead to an opposite result at some intermediate stage. First experimental results on rubidium shows evidences for such an effect.