Lee Gibum, Mun Jonghwan, Choi Hyunsik, Han Seulgi, Hahn Sei Kwang
Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH) 77 Cheongam-ro, Nam-gu Pohang Gyeongbuk 37673 Korea
RSC Adv. 2021 Jun 21;11(36):21897-21903. doi: 10.1039/d1ra03572j.
Individual recognition technology such as iris recognition and bar coding has been extensively investigated for non-face-to-face authorization. However, there are still 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 lenses and patch devices. A multispectral UCNP film in a contact lens showed various luminescence colors of patterns under 980 nm NIR light irradiation and each color could be assigned to 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 UCNP 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 UCNP transparent films as a facile individual recognition platform for non-face-to-face authorization.
诸如虹膜识别和条形码等个体识别技术已被广泛研究用于非面对面授权。然而，对于简便、快速且稳健的个体识别仍存在强烈的未满足需求。在此，我们开发了用于包括隐形眼镜和贴片设备在内的可穿戴设备近红外（NIR）编码的上转换纳米粒子（UCNP）多光谱透明薄膜。隐形眼镜中的多光谱UCNP薄膜在980 nm近红外光照射下呈现出各种发光颜色的图案，并且通过RGB值分析，每种颜色都可以被赋予一个特定代码。通过电荷耦合数字（CCD）相机的RGB值分析成功解码了隐形眼镜中UCNP的编码薄膜。此外，UCNP条形码薄膜可以以可附着条形码贴片的形式应用于各种基材，如猪皮和纸币。综上所述，我们可以确认多光谱UCNP透明薄膜作为非面对面授权的简便个体识别平台的可行性。
