DNA-helix-inspired Kirigami nanogenerator with dual-function energy absorption and conversion

One of the key challenges faced by Triboelectric Nanogenerators (TENGs) in the fields of wearable electronics and biomedical energy harvesting is achieving high output performance, durability, and cost-effectiveness. To address these challenges, a DNA-helix structured kirigami nanogenerator (DSKN) is developed, accommodating 28 hole-shaped power generation units within a compact space, resulting in exceptionally high output performance. Under impulse excitation from footsteps, it generates an instantaneous output of 1552 V and 31.04 μA, achieving a peak power density of 1.30 mW/cm³, through ion beam etching and dip-etching technologies. Notably, it demonstrates a maximum elastic force of 34.5 N during a 24 mm compression-release displacement, requiring 132.4 mJ, indicating its potential for shock-absorbing applications. Building on these mechanical properties, we further integrated DSKN with alternating current electroluminescence (ACEL) to develop a flexible antibacterial insole that harvests mechanical energy from walking to power the ACEL device. The insole activates a photosensitizer (PS) to generate reactive oxygen species (ROS), effectively eliminating over 99 % of drug-resistant bacteria. This work not only enhances the output performance of TENGs but also demonstrates their potential in multifunctional applications, paving the way for next-generation self-powered and antibacterial technologies.