Architecting Silk Protein and Melanin for Photoresponsive and Self-Healable Optoelectronic Skins
- Authors
- Wahab, Abdul; Gogurla, Narendar; Park, Ji-Yong; Kim, Sunghwan
- Issue Date
- Jul-2022
- Publisher
- WILEY
- Keywords
- melanin; self-healable optoelectronic skin; silk protein
- Citation
- ADVANCED MATERIALS TECHNOLOGIES, v.7, no.7, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED MATERIALS TECHNOLOGIES
- Volume
- 7
- Number
- 7
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/187285
- DOI
- 10.1002/admt.202101271
- ISSN
- 2365-709X
- Abstract
- The central processes driving biological phenomena are based on the conduction of ions and electrons in biomaterials, implying the possibility of achieving a fully biomaterial-based electronic skin. However, finding the appropriate biomaterials for electronic skins is still challenging. Here, a photoresponsive, self-healable, and biomaterial-based optoelectronic skin (OE-skin) fabricated with melanin nanoparticles and silk protein is proposed and the electronic properties and their mechanisms in the artificially generated OE-skin are reported. Not only does silk protein hydrogel provide a transparent and skin-compatible platform for use as OE-skin but it also provides the appropriate environment for melanin to demonstrate high electrical conductivity. The OE-skin can be considered a p-type semiconducting material showing high conductivity of up to 6 mS cm(-1) in addition to a 40% enhancement in the conductivity by green laser and ultraviolet light emitting diode illuminations. Additionally, the OE-skin autonomously heals itself from multiple cuts, allowing the restoration of its electrical properties. These material properties enable applications for strain-sensors, humidity sensors, and ultraviolet light sensors, as well as image pixels to convert light-lettering into electrical signals. The proposed fully biomaterial-based OE material platform offers a new way for next-generation electronic skins to achieve a seamless interface with the human body.
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