Practically any material can be given an optical characteristic expressed in numerical value - the level of absorption and reflection of light. In the course of studying carbon nanotubes, specialists were able to discover material that absorbs up to 99.96% of light rays. The world has never seen such a black color.
The randomness of the discovery was that the researchers were actually working on studying the properties of nanotubes to improve their characteristics. The task of the specialists was to determine the most appropriate way to grow them on electrically conductive materials.
During experiments with aluminum foil with a chlorine etching process, the researchers obtained a clot of vertically arranged nanotubes. Scientists were surprised by the color of the material, and after measuring its optical reflectivity, the authors of the project realized that they had discovered the blackest material in the world.
The absorption force of the material is so great that it covered a natural yellow diamond weighing 16.78 carats and worth $ 2 million looks like a flat black void. The use of such a coating is important for optical devices in order to reduce the level of glare. Researchers are confident that the search for" true black " continues and in the future, scientists will be able to find even more light-absorbing material.