Figure 1From: Effect of Nitric Acid “Washing” Procedure on Electrochemical Behavior of Carbon Nanotubes and Glassy Carbon μ-Particles a Cyclic voltammograms of 4% untreated MWCNT-GCPE, b 4% untreated DWCNT-GCPE, c untreated plain GCPE for 1 mM ferricyanide in 50 mM phosphate buffer at different scan rates (inner to outer): 0.01, 0.025, 0.05, 0.1, 0.25 and 0.5 V s−1 Back to article page