“…However, the most widely used method to fabricate these nanopatterns, photolithography, is inherently limited in terms of the achievable feature size, and its advanced counterpart, extreme ultraviolet photolithography, is dauntingly costly and mostly inaccessible to the typical scientist. In this light, block copolymer (BCP) self‐assembly serves as an attractive alternative as it enables access to sub‐10 nm and supra‐100 nm nanopatterns in an incredibly simple manner (e.g., heating in an oven) . BCPs are highly available and affordable working tools for any scientist because they can be easily synthesized in the lab via various controlled/living polymerization techniques including atom transfer radical polymerization (ATRP), single‐electron transfer living radical polymerization, reversible addition–fragmentation chain transfer polymerization, nitroxide‐mediated polymerization, ionic polymerization, and ring‐opening metathesis polymerization …”