An Ultrasound-Driven Bioadhesive Triboelectric Nanogenerator for Instant Wound Sealing and Electrically Accelerated Healing in Emergencies

A bioadhesive triboelectric nanogenerator (BA-TENG), as a first-aid rescue for instant and robust wound sealing and ultrasound-driven accelerated wound healing, is designed. This BA-TENG is fabricated with biocompatible materials, and integrates a flexible TENG as the top layer and bioadhesive as the bottom layer, resulting in effective electricity supply and strong sutureless sealing capability on wet tissues. When driven by ultrasound, the BA-TENG can produce a stable voltage of 1.50 V and current of 24.20 mu A underwater. The ex vivo porcine colon organ models show that the BA-TENG seals defects instantly (approximate to 5 s) with high interfacial toughness (approximate to 150 J m(-2)), while the rat bleeding liver incision model confirms that the BA-TENG performs rapid wound closure and hemostasis, reducing the blood loss by about 82%. When applied in living rats, the BA-TENG not only seals skin injuries immediately but also produces a strong electric field (E-field) of about 0.86 kV m(-1) stimulated by ultrasound to accelerate skin wound healing significantly. The in vitro studies confirm that these effects are attributed to the E-field-accelerated cell migration and proliferation. In addition, these TENG adhesives can be applied to not only wound treatment, nerve stimulation and regeneration, and charging batteries in implanted devices.

Automated summary

A bioadhesive triboelectric nanogenerator (BA-TENG) is designed for instant wound sealing and accelerated wound healing. It is fabricated with biocompatible materials and integrates a flexible TENG as the top layer and bioadhesive as the bottom layer. The BA-TENG can produce stable electricity supply and strong sealing capability, and when driven by ultrasound, it can significantly accelerate wound healing. The E-field generated by BA-TENG promotes cell migration and proliferation.