Step 3: Determination of background intensities: The last ED pattern's radial intensity profile was considered as the background. The intensity profile of the ED patterns as a function of frequency with increasing cumulative doses is shown in fig. . The intensity profile of the last ED pattern at a cumulative dose of 90 e -Å -2 shows the lowest intensity compared to other cumulative doses. This signifies that the amorphization of ZIF-8 particles does not significantly increase the background value.