Figure 4From: Effects of Gas Composition on Highly Efficient Surface Modification of Multi-Walled Carbon Nanotubes by Cation TreatmentXPS C 1s spectra of the pristine MWCNTs and the five chemical species: (1) graphite; (2) sp3 carbons; (3) hydroxyl groups; (4) carbonyl groups; and (5) carboxyl groupsBack to article page