Details

Autor(en) / Beteiligte

• Gogurla, Narendar
• Roy, Biswajit
• Park, Ji-Yong
• Kim, Sunghwan

Titel

Skin-contact actuated single-electrode protein triboelectric nanogenerator and strain sensor for biomechanical energy harvesting and motion sensing

Ist Teil von

• Nano energy, 2019-08, Vol.62, p.674-681

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 (~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/cm2, 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. [Display omitted] •Flexible, biocompatible, and transparent strain sensors and triboelectric nanogenerators are integrated on silk platform.•The silk strain sensor shows a high gauge factor than the commercial metal sensors.•Finger-contact-actuated bio-TENGs show high outputs and reliable biomechanical energy harvesting.•Our silk-based platform opens a new way for wearable electronics, human-machine interface, and bioenergy harvesters.