“…Nanobowls are nanospheres with a single dent, and are often dubbed as dimpled beads and dented nanospheres when the dent is rather small. 1,2 They have shown more intriguing prospects than simple hollow nanostructures in a broad range of research fields, such as energy storage, surface-enhanced Raman scattering (SERS), photonics, catalysis, nanomotors, and drug delivery, and so forth. 3–6 Current methods for synthesizing polymer-based nanobowls are dominated by the template technique, the main disadvantages of which are time consumption and environmental contamination.…”