Self-cleaning Glass
A recent (2001 Pilkington Glass) innovation is so-called self-cleaning glass, aimed at building, automotive and other technical applications. A nanometre-scale coating of titanium dioxide on the outer surface of glass introduces two mechanisms which lead to the self-cleaning property. The first is a photo-catalytic effect, in which ultra-violet rays catalyse the breakdown of organic compounds on the window surface; the second is a hydrophilic effect in which water is attracted to the surface of the glass, forming a thin sheet which washes away the broken-down organic compounds.
Read more about this topic: Architectural Glass
Famous quotes containing the word glass:
“Like a wild stranger out of wizard-land
He dwelt a little with us, and withdrew;
Black and unblossomed were the ways he knew,
Dark was the glass through which his fire eye shined.”
—Edwin Arlington Robinson (1869–1935)