Figure 1
(a) Scanning electron photographs of (a) unaligned SWCNT buckypaper and (b) aligned CNT fiber from in-house floating catalyst chemical vapor deposition. The typical bundle size for the aligned fiber is approximately 30 nm. Red bars indicate 500 nm (c) Typical Raman spectra for these materials at a 785 nm laser excitation. Radial breathing modes appearing below 200 cm−1 indicate the presence of few-walled CNTs. (d) Schematic of the four probe configuration where the field is perpendicular to the probing current flow.
