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ARS Home » Southeast Area » New Orleans, Louisiana » Southern Regional Research Center » Commodity Utilization Research » Research » Publications at this Location » Publication #215279
Title: Laser-Induced Production of Large Carbon-Based Toriods

Author
item Lyn, Margaret
item HE, JIBAO - TULANE UNIVERSITY
item KOPLITZ, BRENT - TULANE UNIVERSITY

Submitted to: Applied Surface Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/13/2004
Publication Date: 12/19/2004
Citation: Lyn, M.E., He, J., Koplitz, B. 2005. Laser-Induced Production of Large Carbon-Based Toriods. Journal of Applied Science and Technology. 246:44-47.

Interpretive Summary: We report on the production of large carbon-based toroids (CBTs) from fullerencs. The process involves two step laser irradiation of a mixed fullcrene target (76% C-60, 22% C-70). Transmission electron microscopy (11M) clearly identifies toroidal-shaped structures as well as Q-shaped constructs. The typical diameters of the CBT’s are~0.2~0.3 µm with tubular diameters of ~50-100 nm, but toriods as wide as 0.5 µm are observed making them nanostructures on the vergo of being microstructures.

Technical Abstract: We report on the production of large carbon-based toroids (CBTs) from fullerencs. The process involves two step laser irradiation of a mixed fullcrene target (76% C-60, 22% C-70). Transmission electron microscopy (11M) clearly identifies toroidal-shaped structures as well as Q-shaped constructs. The typical diameters of the CBT’s are~0.2~0.3 µm with tubular diameters of ~50-100 nm, but toriods as wide as 0.5 µm are observed making them nanostructures on the vergo of being microstructures.