Replicating the structure of bird feathers with rubber nanostructures

https://techxplore.com/news/2023-12-replicating-bird-feathers-rubber-nanostructures.html

"similar to blue of eastern bluebird feathers... transparent silicone rubber in oily solution and left to swell for several days at 60°C, then cooled and rubber extracted...  phase separation causing network of channels with 800 nm diameter... material is scalable... battery solid electrolytes with network structure of interconnected channels that avoid physical contact between electrodes while maintaining good ion transport... water filters... cellulose, chitin structure similar to the rubber, and environmentally friendly"