Fig. 5: The morphology analysis of CTF film.

a, b SEM images of the film supported on TEM copper grid. c Cross-section SEM image. d SEM image and element mapping: e carbon; f nitrogen. The CTF film was prepared using 6.3 mM amidine.

a, b SEM images of the film supported on TEM copper grid. c Cross-section SEM image. d SEM image and element mapping: e carbon; f nitrogen. The CTF film was prepared using 6.3 mM amidine.