🔬 How small is nano?

Intro · The nano world · 9 min

1 nanometre = one-billionth of a metre (10⁻⁹ m). A hair is ~80,000 nm thick; DNA is ~2 nm wide. At the nanoscale, colour, strength and conductivity change: gold nanoparticles can look red!

Project: Find 3 nano-products (sunscreen, water-repellent fabric, phone screen) and write what nano does in each.