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Kỷ lục thế giới: Mã QR siêu nhỏ chỉ 1,98 micromet vuông nhỏ hơn cả vi khuẩn

World record: Ultra-small QR code measuring just 1.98 square micrometers, smaller than a bacterium.

Scientists at TU Wien and Cerabyte have created the world's smallest QR code, measuring 1.98 square micrometers, using focused ion beam technology to permanently engrave data onto ceramic.
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