Air-purifying church windows were an early form of nanotechnology

摘要

Stained glass windows that are painted with gold purify the air when they are lit up by sunlight, Queensland University of Technology experts have discovered. Associate Professor Zhu Huai Yong, from QUT's School of Physical and Chemical Sciences, said that glaziers in medieval forges were the first nanotechnologists who produced colours with gold nanoparticles of different sizes.