Special Issue Information

The growing demand for sustainable energy solutions, Internet of Things (IoT) networks, and intelligent electronics has driven the rapid development of self-powered systems capable of harvesting ambient mechanical energy. Triboelectric nanogenerators (TENGs) and piezoelectric nanogenerators (PENGs), as two rapidly emerging energy harvesting technologies, have attracted significant attention due to their high energy conversion efficiency, broad material selection, structural diversity, lightweight characteristics, and excellent compatibility with flexible electronics. These unique features make TENGs and PENGs promising building blocks for next-generation self-powered systems. By integrating TENGs and PENGs with functional materials, micro/nano-structural designs, and advanced manufacturing techniques, nanogenerator-based energy harvesting platforms provide new opportunities for developing high-performance self-powered technologies, including wearable electronics, environmental monitoring sensors, implantable medical devices, and human–machine interactive systems.

This Special Issue aims to highlight the latest advancements and emerging trends in the design, fabrication, characterization, and applications of advanced triboelectric and piezoelectric nanogenerators for self-powered systems. The topics covered include, but are not limited to:
(1) Innovative synthesis, structural engineering, and surface/interface modification of triboelectric and piezoelectric materials;
(2) Advanced fabrication technologies and device architectures for high-output, flexible, and stretchable nanogenerators;
(3) Triboelectric and piezoelectric nanogenerator-based self-powered sensors, electronic skins, and health monitoring systems;
(4) Hybrid nanogenerator systems and multi-source energy harvesting strategies for enhanced power output;
(5) Self-powered systems enabled by TENGs and PENGs for environmental monitoring, blue energy, and wireless transmission;
(6) Durability, environmental stability, and system-level integration of nanogenerator-based self-powered devices.

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