Thanks for your question, we looked up several literature and couldn't find a fixed usage of cracks and voids, and in this article, we think that using pores would completely cover our research objectives, so we deleted the cracks in this paper. Computed microtomography is usually used to confirm the voids in micron-scale but this paper focuses on nano-scale voids.
The authors mention cracks as well as voids. How are the cracks differentiated from the voids? Were voids observed? Could computed microtomography be used to confirm some of the experimental results?