fig3
Figure 3. SEM images of CF surface morphologies after various treatments: (A1-A2) untreated CF (as received), (B1-B2) desized CF, (C1-C2) GO-modified CF, (D1-D2) CNT-modified CF, and (E1-E2) GO-CNT hybrid-modified CF. High-resolution XPS spectra of CF surfaces: (F) wide scan, and (G) deconvoluted C1s spectra. SEM: Scanning electron microscopy; CF: carbon fiber; GO-CNT: graphene oxide-carbon nanotube.
