An anonymous reader writes "The BBC reports researchers in Korea have developed a technology that can be used as a viable alternative to QR codes. Made of plastic and electronic ink, the rectennas cost less than one penny each to produce and use the NFC standards for wireless radio communication to devices. They are seen as a cheap, easy-to-print and environmentally friendly way to overcome the limitations and inconvenience of QR codes, the usage of which has greatly increased in the last few years."
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