(Nanowerk News) Everyone knows it from their childhood days in the sandpit: sand is filtered using a sieve. Larger stones get stuck, while fine sand can fall through the sieve. The same principle is ...

The patented process includes the use of stainless steels balls as a high-abrasion sieving aid, with the UNSW team saying that in tests they have been able to extract 99% of the components, including ...