Skin-contact actuated single-electrode protein triboelectric nanogenerator and strain sensor for biomechanical energy harvesting and motion sensing
- Authors
- Gogurla, Narendar; Roy, Biswajit; Park, Ji-Yong; Kim, Sunghwan
- Issue Date
- Aug-2019
- Publisher
- ELSEVIER
- Keywords
- Silk protein; Strain sensor; Triboelectric nanogenerator; Flexible; Wearable electronics
- Citation
- NANO ENERGY, v.62, pp.674 - 681
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANO ENERGY
- Volume
- 62
- Start Page
- 674
- End Page
- 681
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189446
- DOI
- 10.1016/j.nanoen.2019.05.082
- ISSN
- 2211-2855
- Abstract
- Wearable/attachable electronics are essential for the seamless human-machine interface. However, it is still challenging to obtain an efficient and lighter power source. Here, we utilize a nanostructured silk protein and silver nanowires (AgNWs) buried in the silk nanostructure to yield an efficient, flexible, transparent, and skin/textile-compatible triboelectric nanogenerator (TENG) and strain sensor for biomechanical energy harvesting and motion sensing. As a strain sensor, the device shows very high gauge factor (similar to 30), and stably detects the bending and unbending of knuckles. With the large surface area of the nanostructured silk/AgNW surface, finger-contact can actuate the silk bio-TENG and generate the considerably high power density of 2 mW/cm(2), which is sufficient to power light-emitting diodes. The optical transparency of the bio-TENG makes it possible to use the device as a touch sensor on electronic devices. The strain sensor and the bio-TENG are integrated into a single silk chip and attached to skin and fabrics to monitor the strain and harvest the biomechanical energy at the same time. Advantages of the protein-based energy skin including low cost, ease of fabrication, biocompatibility, flexibility, and transparency, empower its usage for a seamless human-machine interface, touch sensor, and wearable bioelectronics.
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