Applications of wrinkles based on liquid crystalline polymer
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초록
내용
Periodic microstructures over a large area allow interesting functionalities such as structural color and self-cleaning surfaces and lead to a wide range of applications from adaptive bioengineering and flexible electronics to adhesives. Surface wrinkles can be used in various fields and it has been applied to improve the efficiency of electro-optical devices and the mobility of charge carriers in semiconductor devices. A custom-built optical setup employing a spatial light modulator (SLM) illuminates polarized ultraviolet light on a particular area of photo-alignment layers. Wrinkles produced during the plasma-treatment polymerization of RMs can be aligned accordingly. The pixelated wrinkles can record naturally invisible images by mapping the gray level to the orientation of the wrinkles. As a result, it is shown that pixelated wrinkles enable new applications in optics such as informative labeling, anti-counterfeiting, and physical unclonable functions (PUFs).