What is stronger than carbon nanotubes?

Carbon nanotubes are the strongest material discovered till date. This is the main difference between carbon nanotubes and graphene. 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