Materials Genome Institute, Shanghai University, Shanghai, 200444, China.
School of Computer Engineering and Science, Shanghai University, Shanghai, 200444, China.
Small. 2021 Jul;17(30):e2100244. doi: 10.1002/smll.202100244. Epub 2021 Jun 23.
An ideal anti-counterfeiting label not only needs to be unclonable and accurate but also must consider cost and efficiency. But the traditional physical unclonable function (PUF) recognition technology must match all the images in a database one by one. The matching time increases with the number of samples. Here, a new kind of PUF anti-counterfeiting label is introduced with high modifiability, low reagent cost (2.1 × 10 USD), simple and fast authentication (overall time 12.17 s), high encoding capacity (2.1 × 10 ), and its identification software. All inorganic perovskite nanocrystalline films with clonable micro-profile and unclonable micro-texture are prepared by laser engraving for lyophilic patterning, liquid strip sliding for high throughput droplet generation, and evaporative self-assembling for thin film deposition. A variety of crystal film profile shapes can be used as "specificator" for image recognition, and the verification time of recognition technology based on this divide-and-conquer strategy can be decreased by more than 20 times.
一种理想的防伪标签不仅需要不可克隆且准确，还必须考虑成本和效率。但是传统的物理不可克隆功能（PUF）识别技术必须将数据库中的所有图像一一匹配。匹配时间随样本数量的增加而增加。在这里，介绍了一种新型 PUF 防伪标签，其具有高可修改性、低试剂成本（2.1×10 美元）、简单快速的认证（总时间 12.17 秒）、高编码容量（2.1×10）和其识别软件。通过激光雕刻、亲液图案化的液滴高速生成、蒸发自组装的薄膜沉积，制备了具有可克隆微观形貌和不可克隆微观纹理的全无机钙钛矿纳米晶薄膜。各种晶体薄膜的形貌可以作为图像识别的“特征码”，基于这种分而治之策略的识别技术的验证时间可以减少 20 多倍。
