期刊
ACS APPLIED POLYMER MATERIALS
卷 1, 期 1, 页码 47-53出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsapm.8b00031
关键词
grain boundaries; breath figure; anti-counterfeiting; physical unclonable function; high encoding capacity
资金
- National Natural Science Foundation of China [51522305, 51873192]
- Fundamental Research Funds for the Central Universities [2015XZZX004-26]
Grain boundaries widely exist in 2-D materials, and they are often considered as defects harming the physicochemical properties of materials. Here, we report unclonable anti-counterfeiting films based on the grain boundaries of patterned porous structures. The porous films are prepared from hydroxyl-end-functionalized polystyrene (OH-PS), polystyrene-block-poly(N,N-dimethylaminoethly methacrylate) (PS-b-PDMAEMA), and cyclic polystyrene (c-PS) via a typical breath figure process, during which the evaporation of solvents provides enough instability and promises the uniqueness of surface grain boundaries. The anti-counterfeiting tags are convenient to be authenticated by portable devices. The self-assembly nature of the arrays endows the films with an extremely high encoding capacity. Moreover, the present anti-counterfeiting films are configurable, transparent, flexible, and aesthetically appealing to adapt to various applications. This work demonstrates highly secure unclonable anti-counterfeiting films and provides new understandings to grain boundaries of 2-D materials.
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