Self-assembling materials called block copolymers, which are known to form a variety of predictable, regular patterns, can now be made into much more complex patterns that may open up new areas of materials design, a team of MIT researchers say.
source https://www.lifetechnology.com/blogs/life-technology-news-blog/self-assembling-materials-can-form-patterns-that-might-be-useful-in-optical-devices