The DNA VPS coacervates on the microdroplet interface were key in forming complex hierarchical structures, such as porous DNA microcapsules. In this study, the diffusion of the DNA Y-motif was considered to be limited by the microdroplet interface friction, and the difference in the diffusion rate between the DNA Y-motif and surrounding small molecules was enhanced, resulting in the formation of the VPS pattern, which was not observed in bulk solution experiments before . In addition, the dependence of the porous pattern formation on the microdroplet radius can be interpreted in terms of the wettability of the DNA coacervate to the microdroplet interface; i.e., the decrease in the wettability of the DNA coacervate to the surface with the increase of the microdroplet radius would result in the preferable formation of porous structures of capsular DNA coacervates.