Inorganic fullerene-like nested nanostructures (IFs) such as the WS2 IFs shown in the Figure deposited on an a-SiOx-coated TEM grid are confirmed to confer tribological advantages when added to a lubricant fluid (tetradecane) between two shearing mica surfaces. It is shown that the lower friction is associated with friction-induced material transfer of WS2 from the IFs to the mica surfaces.
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Golan et al. (1999) studied this question.