Quantum Dots…The Future of Solar?

A recent discovery shatters the notion that one photon can only excite one electron.  Researchers from the joint SLAC-Stanford Pulse Institute for Ultrafast Energy Science are on the move to boost solar cell efficiencies by confirming that a single photon can indeed excite more than one electron in a quantum … [continued]

Revved-Up Sand Could Purify Water

First there was the Life Straw.  Then there was the Aquaduct Tricycle.  Now ordinary sand could provide an answer to one of the thorniest problems of the future: how to purify drinking water for the many millions of people who don’t have access to a clean, disease-free source — and … [continued]