By XiaoZhi Lim
New York Times
Ben Zhong Tang was stumped. A chemist at the Hong Kong University of Science and Technology, he was looking at a powder that glowed bright green under ultraviolet light. But when the powder was dissolved in a clear solution, the glow disappeared.
It was 2001, and Dr. Tang’s observation defied everything then known about light-emitting molecules.
Continue reading at the New York Times. Originally published on Feb 15, 2016.