|United States Patent||5,316,636|
|Bunshah, et. al.||May 31, 1994|
|Inventors:||Bunshah; Rointan F. (Playa del Rey, CA); Jou; Shyankay (Santa Monica, CA); Prakash; Shiva (Santa Barbara, CA); Doerr; Hans J. (Westlake Village, CA).|
|Assignee:||The Regents of the University of California (Oakland, CA).|
|Filed:||Aug. 12, 1992|
|Intl. Cl.:||C06B 31/00;|
|U.S. Cl.:||204/157.47; 423/445.B;|
|Field of Search:||445 B |
Kratschmer et al. "Spectroscopy or Matrix-Isolated Carbon Cluster Molecules Between 200 and 850 nm Wavelength", Surface Science, vol. 156 (1985) pp. 814-821.
Haufler et al. "Carbon Arc Generation of C(60) ", Mat. Res. Soc. Symp. Proc. vol. 206, Nov. 29, 1990, pp. 627-637.
Strem Chemicals, Inc. "Procedure for Extracting Fullerenes from Raw Soot", Jul. 22, 1991.
A process and system for producing fullerenes by electron beam evaporation of a carbon target in a vacuum. A carbon target is evaporated by an electron beam in a vacuum to form a flux of carbon atoms or clusters. The evaporated carbon atoms or clusters are deposited onto collection substrates which are electrically charged and heated or neutral and chilled. The resulting carbon soot is extracted to recover fullerenes. The process produces carbon soot which is rich in C(70) and higher fullerenes.