A liquid laser that is robust in air and tunable by wind

https://phys.org/news/2023-02-liquid-laser-robust-air-tunable.html

"work as flexible, long-lasting, and pneumatically tunable lasers that can be used in ambient conditions... copies microscopic bumps in lotus leaf enabling liquid droplets of near-perfect spheres which act like lasers... ionic liquid called 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIBF4) mixed with dye that allows it to become a laser... evaporates very slowly and has relatively large surface tension... quartz substrate is coated with tiny fluorinated silica nanoparticles to make the surface repel liquids"