Production of fullerenes by electron beam evaporation

Details Production of fullerenes by electron beam evaporation Production of fullerenes by electron beam evaporation

1992-08-12

1994-05-31

Lewis, Michael

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

423445B, C06B 3100

Patent

active

053166361

ABSTRACT:
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.sub.70 and higher fullerenes.

REFERENCES:
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.sub.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.

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