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. 2019 Jul 2;6(16):1900925. doi: 10.1002/advs.201900925

Figure 12.

Figure 12

a) Coding encryption capability of the flexible plasmonic metafilm with a 5 × 5 iridescent square array, the logo of Zhejiang University, and a quick response (QR) code. b) Demonstration of the flexibility of the plasmonic tape. c) Example of an encoding strategy using the iridescent QR system. Scale bars: a,b) 1 cm; c) 2 mm. Reproduced with permission.80 Copyright 2016, John Wiley & Sons. d) Demonstration of a flexible 3D SERS security label. e) Such security label subjected to bending, flexing, and twisting forces. f) SERS images and the corresponding SERS spectra of the letter “G” i) before and ii) after 50 mechanical stress cycles. All scale bars represent 5 µm. Reproduced with permission.183 Copyright 2017, American Chemical Society.