Ultra-Adaptable and Wearable Photonic Skin Based on a Shape-Memory, Responsive Cellulose Derivative
- Authors
- Yi, H.; Lee, S.-H.; Ko, H.; Lee, D.; Bae, W.-G.; Kim, T.-I.; Hwang, D.S.; Jeong, H.E.
- Issue Date
- Aug-2019
- Publisher
- Wiley-VCH Verlag
- Keywords
- colorimetric sensor; dry adhesive; hydroxypropyl cellulose (HPC); photonic skin; skin patch
- Citation
- Advanced Functional Materials, v.29, no.34, pp.1902720
- Journal Title
- Advanced Functional Materials
- Volume
- 29
- Number
- 34
- Start Page
- 1902720
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/34845
- DOI
- 10.1002/adfm.201902720
- ISSN
- 1616-301X
- Abstract
- Photonic skins enable a direct and intuitive visualization of various physical and mechanical stimuli with eye-readable colorations by intimately laminating to target substrates. Their development is still at infancy compared to that of electronic skins. Here, an ultra-adaptable, large-area (10 × 10 cm2), multipixel (14 × 14) photonic skin based on a naturally abundant and sustainable biopolymer of a shape-memory, responsive multiphase cellulose derivative is presented. The wearable, multipixel photonic skin mainly consists of a photonic sensor made of mesophase cholesteric hydroxypropyl cellulose and an ultra-adaptable adhesive layer made of amorphous hydroxypropyl cellulose. It is demonstrated that with multilayered flexible architectures, the multiphase cellulose derivative–based integrated photonic skin can not only strongly couple to a wide range of biological and engineered surfaces, with a maximum of ≈180 times higher adhesion strengths compared to those of the polydimethylsiloxane adhesive, but also directly convert spatiotemporal stimuli into visible color alterations in the large-area, multipixel array. These colorations can be simply converted into 3D strain mapping data with digital camera imaging. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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