TRACE-ELEMENT IMPURITIES IN C-60, C-70, AND GRAPHITE SOOT

Trace element concentrations in graphite soot, C-60, and C-70 have bee n determined by instrumental neutron activation analysis, It has been shown that all these materials contain trace element impurities at par ts-per-billion and even parts-per-million concentration levels. As str uctural and physical properties are known to be sensitive to such dopa nt concentrations of trace element impurities, it is argued that futur e investigations on electrical, magnetic, and the properties of fuller enes will have to consider the concentration of trace element impuriti es in these materials.