| 초록 |
The individual recognition technology such as iris recognition and bar coding has been extensively investigated for non-face-to-face authorization. However, there are strong unmet needs for facile, rapid, and robust individual recognition. Here, we developed multispectral transparent films of upconversion nanoparticles (UCNPs) for near-infrared (NIR) encoding of wearable devices including contact lens and patch devices. The multispectral UCNPs film in the contact lens showed various luminescence colors of patterns under 980 nm NIR light irradiation and each color could be assigned for a specific code by RGB value analysis. The encoded film of UCNPs in the contact lens was successfully decoded by the RGB value analysis with a charge coupled digital (CCD) camera. Furthermore, the UCNPs barcode film could be applied in the form of attachable barcode patches onto various substrates like porcine skin and paper currency. Taken together, we could confirm the feasibility of multispectral UCNPs transparent films as a facile individual recognition platform for non-face-to-face authorization. |
