Materials · 1991

Carbon nanotubes

Rolled sheets of carbon atoms with extraordinary strength.

Sumio Iijima at NEC reported multi-walled carbon nanotubes in 1991. Nanotubes are now used in battery electrodes and conductive composites.

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 1