Who explained carbon nanotubes for the first time?

Sumio Iijima of NEC discovered carbon nanotubes for the first time in 1991 and explained what they are.The images of carbon nanotubes were produced for the first time by Roger Bacon in 1959. You can read about Nanotechnology in India – Origins, Uses, Developments in the given link.

Further readings:

1. Nano Mission – UPSC Nanotechnology Notes for Science & Technology
2. Science & Technology Notes For UPSC – General Science Notes