United States Patent | 5,223,479 |
McCauley, Jr., et. al. | Jun. 29, 1993 |
Inventors: | McCauley, Jr.; John P. (Folscroft, PA); Zhu; Qing (Philadelphia, PA); Vaughan; Gavin (Philadelphia, PA); Coustel; Nicole (Philadelpha, PA). |
Assignee: | The Trustees of the University of Pennsylvania (Philadelphia, PA). |
Appl. No.: | 738,888 |
Filed: | Aug. 1, 1991 |
Intl. Cl.: | H01L 39/24; H01L 39/12; C01B 31/00; |
U.S. Cl.: | 505/1.; 505/725.; |
Field of Search: | 500;518 |
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Superconducting, metal-doped fullerenes are provided, along with processes for their preparation in relatively high stoichiometric purity. In one embodiment, the processes provide fullerenes of the formula M(3) C(60) where M is an alkali metal. The processes comprise contacting C(60) with alkali metal in an amount and under reaction conditions effective to produce a compound having the formula M(y) C(60), where y is greater than 3, and contacting said M(y) C(60) with a portion of C(60) in an amount and under reaction conditions effective to produce said M(3) C(60).
Certain of the inventors have been supported by National Science Foundation MRL Program grant DMR 88-19885.