TY - JOUR
T1 - Versatile Mechanochromic Sensor based on Highly Stretchable Chiral Liquid Crystalline Elastomer
AU - Han, Woong Chan
AU - Lee, Young Joo
AU - Kim, Se Um
AU - Lee, Hye Joo
AU - Kim, Young Seok
AU - Kim, Dae Seok
N1 - Publisher Copyright:
© 2022 Wiley-VCH GmbH.
PY - 2023/2/15
Y1 - 2023/2/15
N2 - A mechanochromic strain sensor that is capable of distinguishing the orientation, the location, and the degree of deformation based on the highly stretchable membrane of main-chain chiral liquid crystalline elastomer (MCLCE) is proposed. The MCLCE film is designed to exhibit uniform and significant color shift upon the small strain by using step-growth polymerization of liquid crystal (LC) oligomer and its phase-stabilization in solvent mesogen. As conformally placed on the bottom elastomer sheet, the MCLCE film shows multimodal, instantaneous color change for sensing arbitrary in-plane deformation, out-of-plane bending, and nonzero Gaussian deformation. Based on high freedom in the device design, it is also demonstrated that this sensor can display color patterns or encrypted images in response to the localized weight or strain. The simple and straightforward concept proposed here can be applicable in the fields of wearable devices, displays, and soft robotics.
AB - A mechanochromic strain sensor that is capable of distinguishing the orientation, the location, and the degree of deformation based on the highly stretchable membrane of main-chain chiral liquid crystalline elastomer (MCLCE) is proposed. The MCLCE film is designed to exhibit uniform and significant color shift upon the small strain by using step-growth polymerization of liquid crystal (LC) oligomer and its phase-stabilization in solvent mesogen. As conformally placed on the bottom elastomer sheet, the MCLCE film shows multimodal, instantaneous color change for sensing arbitrary in-plane deformation, out-of-plane bending, and nonzero Gaussian deformation. Based on high freedom in the device design, it is also demonstrated that this sensor can display color patterns or encrypted images in response to the localized weight or strain. The simple and straightforward concept proposed here can be applicable in the fields of wearable devices, displays, and soft robotics.
KW - chiral liquid crystalline elastomers
KW - mechanochromic applications
KW - mechanochromic sensors
KW - multimodal strain sensors
KW - photonic elastomers
UR - http://www.scopus.com/inward/record.url?scp=85143892363&partnerID=8YFLogxK
U2 - 10.1002/smll.202206299
DO - 10.1002/smll.202206299
M3 - Article
C2 - 36464625
AN - SCOPUS:85143892363
SN - 1613-6810
VL - 19
JO - Small
JF - Small
IS - 7
M1 - 2206299
ER -