Fig. 2: Structural analysis of OCM/PEI adhesive.

FTIR spectra of (a) CM and OCM samples, (b) PEI, OCM, and OCM/PEI samples. c O 1 s and (d) N 1 s of XPS curves towards CM, OCM and OCM/PEI adhesive. e Schematic diagram of the adhesion mechanism of OCM/PEI adhesive.