Figure 3 Vertical cross-section SEM images of Fc (a,b), and horizental cross section SEM images of Fc (c), CN-Fc (c), CN-Fc1 (c) and AO-Fc(c)
Figure 4 showed dark-field images of CN-Fc, CN-Fc1 and AO-Fc with the corresponding elemental mapping. The images clearly showed the high number of nano precipitates as illustrated in corresponding Figure 4a-i and their elemental percentage was reported in Table 1. These precipitates were mostly C, N, and O which are arranged in a rectangular homogenous pattern. The C and N elements of CN-Fc and CN-Fc1 were distributed in a rectangular fashion (Figure 4dgeh) confirming the presence of C and N elements in plenty and arranged in a homogenous pattern. Figure 4fi showed the presence of O in rectangular patterns confirmed the successful conversion of nitrile groups into amidoxime groups.