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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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Will Meta’s deal make social media safe for kids? Researchers are dubious
2+ week, 1+ day ago (214+ words) Nature talks to specialists about the changes coming to Facebook and Instagram, and whether there’s evidence they will help....