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Superfulleride formation and electronic properties of C60 on K/Rh(111) surfaces

โœ Scribed by L.Q. Jiang; B.E. Koel

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
701 KB
Volume
223
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Despite the high electron affinity of Cso, photoemission and work function measurements of C&, on Rh ( 111) surfaces containing submonolayer amounts of K show that a low value of the work function is not sufftcient to cause extensive charge transfer ( > 1 electron) from the substrate to the CsO molecule. However, when appropriate amounts of Cso are evaporated onto potassium multilayem of controlled thickness at 100 K, interdiffusion occurs and potassium superfullerides, K,C, with 6 < x< 12, form on the surface. The resulting phases can be purified by annealing the sample to = 325 K for x+ 12, or higher temperatures for lower K stoichiometries, to drive out excess K.

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