	US 7,481,990 B2
	Methods for osmylating and ruthenylating single-walled carbon nanotubes
Stanislaus S. Wong, Middle Island, N.Y. (US); and Sarbajit Banerjee, Stony Brook, N.Y. (US)
Assigned to The Research Foundation of State University of New York, Albany, N.Y. (US)
Filed on Jan. 27, 2005, as Appl. No. 11/45,808.
Prior Publication US 2006/0165586 A1, Jul. 27, 2006
Int. Cl. B05D 1/18 (2006.01); C09C 1/44 (2006.01); D01F 9/12 (2006.01)

U.S. Cl. 423—460 [423/461; 423/447.1; 977/748; 977/751; 977/847; 977/892; 427/430.1; 427/443.2; 427/903]

16 Claims

3. A method of separating metallic carbon nanotubes from semiconducting carbon nanotubes based on density, the method comprising:

(a) providing a nanotube dispersion, wherein the nanotube dispersion comprises a plurality of metallic and semi-conducting carbon nanotubes, osmium tetroxide and a solvent;

(b) irradiating the nanotube dispersion with ultraviolet light, wherein the metallic carbon nanotubes are osmylated thereby differentiating the metallic carbon nanotubes from the semiconducting carbon nanotubes; and