supplemental Material and Method

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Aliquots were then analyzed for Ag, Al, As, Ba, Be, Ca, Cd, Co,. Cr, Cu, Fe, K, La, Li, Mg, Mn, Mo, Na, Ni, P, Pb, Sb, Se, Sr, Te, Ti, V, Y, Zn, and Zr ...


Supplemental Materials and Methods
SWCNT particles
Commercially manufactured raw SWCNT made by the Arc method in specifically designed chambers was obtained through collaboration with the National Institute of Standards and Technology (NIST, Gaithersburg, MD. The SE grade SWCNT manufactured by CarboLex was reported to have a purity of 70-90% and contained catalyst impurities encapsulated in carbon shells (Carbolex Inc., Broomall, PA). Some amorphous carbon was also found on the outer surfaces of the ropes. The SWCNT were heated by the manufacturer to 2,800° C in an argon atmosphere using a graphite furnace to improve structural integrity and to remove polyaromatic hydrocarbons and a significant amount of iron. The individual SWCNT are self-assembled into a rope bundle structure. SWCNT manufactured by this method are reported to have an average diameter of 1.4 nm with lengths of 2-5 μm.