“…Thirdly, it can reproducibly provide drug-loaded nano/microparticles (5 nm−100 μm) with a narrow size distribution (Chen and Pui, 1997); Coulombic repulsion between the highly charged electrosprayed droplets results in self-dispersion particles without coalescence (Xu and Hanna, 2006). Last, but not least, through adjustment of the above-mentioned solution factors and processing parameters, carriers in different structures can be obtained, such as hollow microspheres (Jafari-Nodoushan et al, 2015; Zhou et al, 2017), nanocups (Kiran et al, 2016), porous microcarriers (Gao et al, 2015; Karimian et al, 2016; Huang et al, 2017), cell-shaped microparticles (Khanum et al, 2015; Ju et al, 2017), core–shell/multilayered microspheres (Rasekh et al, 2017; Zhang et al, 2017a), and Janus particles (Sanchez-Vazquez et al, 2017; Li et al, 2018). The schematic diagram of the structures can be found in Figure 1, and the real images can be found in the referred publications.…”