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Nanodisk Codes: Nano-sized physical binary codes
physorg.com — Researchers at Northeastern University have devised a way to use billionth-of-a-meter-sized disks to create codes that could be used to encrypt information, serve as biological labels, and even tag and track goods and personnel. The nanodisks can form a physical pattern, similar in concept to a barcode, as well as a spectroscopic code.
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