'Magic wand' reveals a colorful nano-world

Researchers describe a revolutionary imaging technology that compresses lamp light into a nanometer-sized spot. It holds that light at the end of a silver nanowire like a Hogwarts student practicing the 'Lumos' spell, and uses it to reveal previously invisible details, including colors, in nanomaterials such as carbon nanotubes.

source https://www.sciencedaily.com/releases/2021/11/211125154829.htm