Self-powered artificial skin made of engineered silk protein hydrogel
- Title
- Self-powered artificial skin made of engineered silk protein hydrogel
- Author
- 김성환
- Keywords
- Silk protein; Nanorods; Nanocomposite; Piezoelectric; Electronic skin; Energy harvest
- Issue Date
- 2020-08
- Publisher
- ELSEVIER
- Citation
- NANO ENERGY, v. 77, article no. 105242
- Abstract
- Engineered silk protein hydrogel that resembles skin tissue is a promising material for artificial electronic skin; it can be interfaced with real biological tissues seamlessly and used as an artificial tissue in soft robotics. Herein, we report a soft, biocompatible, and skin-adhesive silk hydrogel incorporating ZnO nanorods (ZnONRs) for a tribo- and piezo-electric energy-generating skin (EG-skin) that can harvest biomechanical energy and sense biomechanical motions. Incorporation of ZnONRs mediates an eight-fold enhancement of piezoelectricity compared to pristine silk hydrogel. An additional two-fold increase in the electrical response is possible when it is encapsulated in silk protein layers because of the hybrid effect of tribo- and piezo-electricity. The high power generated (~1 mW/cm2) is sufficient to activate low-power electrical devices, such as LEDs, oximeters, and stopwatches. Additionally, the EG-skin can be used as a tactile identifier for finger movements with quantized real-time electrical signals. The softness and skin-adhesive properties provide conformal interfaces with human skin and biological tissues, and we can harvest energies of approximately 6.2 and 0.9 μW/cm2, respectively, from their mechanical stimulation. The silk-protein-based artificial EG-skin can be effectively utilized in human–machine interfaces, tactile sensors, soft robotics, and biomedical implants.
- URI
- https://www.sciencedirect.com/science/article/pii/S221128552030820X?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/175095
- ISSN
- 2211-2855; 2211-3282
- DOI
- 10.1016/j.nanoen.2020.105242
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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