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QLEDs â light-emitting diodes that rely on nanocrystals called quantum dots â are usually made with toxic heavy metals. A strategy has been developed to make QLEDs with a performance comparable to that of commercially available technologies but using a more environmentally friendly alloy of zinc, selenium, telluriu
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Exclusive: NSF set to issue lowest number of new grants in four decades
3+ week, 3+ day ago (23+ words) The US science-funding agency is withholding $1 billion of its budget so that the money can go to a special White House project....