A compact disk coated entirely with zinc nanorods (Photo: Din Ping Tsai, National Taiwan University)
Electron microscope image showing nanorods growing on the disk. (Image: Din Ping Tsai, National Taiwan University)
An unlikely tool for sewage treatment (Photo: Stuart Pilbrow)
A team of Taiwanese researchers is to demonstrate a method of treating sewage using old optical disks such as CDs. The disks are used as a platform to grow minuscule nanorods of zinc oxide, a known photocatalyst capable of breaking down organic matter. By spinning the disks, sewage water spreads into a thin layer through which light can pass, exciting the nanorods into action.
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