Flexible Photonic Crystal Material for Multiple Anticounterfeiting Applications

ACS Applied Materials & Interfaces
Chang-Yi PengGou-Jen Wang

Abstract

In this study, a nanoimprinting method was introduced to fabricate polycarbonate films with transparent and flexible photonic crystal (FPC) structures. The fabricated flexible polymer films display a full-color grating because of the nanohemispherical structures on the surface. Through the Bragg diffraction formula, it was confirmed that the FPC polymer films transfer a part of the light energy to the second-order diffraction spectrum. Furthermore, the full-color grating properties can be modulated through geometric deformation because of the film's elasticity. Additionally, anticounterfeiting features were also successfully achieved when the polymer films were either engraved with drawings and bent or patterned with fluorophores, which can be revealed under ultraviolet light. The most important aspect of this research is that the preparation of this FPC-structured polymer film is inexpensive and convenient, enabling the mass production of a new generation of smart materials.

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Citations

Jul 17, 2019·Advanced Materials·Wenyi LiFiorenzo G Omenetto
May 21, 2021·ACS Applied Materials & Interfaces·Zhujun ZengYongqing Xia
Jun 24, 2021·IScience·Pengxiang SiBoxin Zhao
Feb 13, 2019·ACS Applied Materials & Interfaces·Soo-Jung KimSung-Hoon Hong
Mar 5, 2019·ACS Applied Materials & Interfaces·Yeong Jae KimYoung Min Song
Nov 9, 2021·Chemical Reviews·Zhiwei LiYadong Yin

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