| 초록 |
So far, highly accurate and quantitative mechanical sensors have been developed based on electrical signaling system and widely used in industries for diagnosis of device lifetime and safety issues. However, it is still extremely challenge to distinguish strain types using mechanical sensors. Here, we fabricate photonic crystal elastomer film that is consisting of cholesteric liquid crystals(CLCs) showing helical layering structure normal to the film. the CLC film shows a susceptive responsibility to external stress with various curvatures by locally varying the photonic band gap over the film from IR(infrared radiation) to the UV(ultra violet) region within 70% strain. Based on the CLC film, we demonstrated the mechanical stimuli-responsive photonic sensor that is capable of presenting quantitative deformation including not only simple stretching but also bending with direction out of plane, in-plane, and even complex deformation with Gaussian curvature. |
