2D Layered Materials Based Triboelectric Self-Powered Sensors

Sensors play a crucial role in enhancing the quality of life, ensuring safety, and facilitating technological advancements. Over the past decade, 2D layered materials have been added as new sensing element in addition to existing materials such as metal oxides, semiconductors, metals, and polymers. 2D Layered materials are typically characterized by their single or few-layer thickness and offer a high surface-to-volume ratio, exceptional mechanical strength, and unique electronic attributes. These properties make them ideal candidates for a variety of sensing applications. This review article focused on utilizing 2D layered materials in triboelectric nanogenerators (TENGs) for different sensing applications. The best part of TENG-based sensing is that it is self-powered, so no external power supply is required. The initial part of the review focused on the importance of the 2D layered materials and their innovative integration methods in TENGs. Further, this review discusses various sensing applications, including humidity, touch, force, temperature, and gas sensing, highlighting the impact of 2D layered materials in enhancing the sensitivity and selectivity of TENG sensors. The last part of the review discusses the challenges and prospects of TENG-based self-powered sensors. The present review explores the utilization of 2D layered materials in triboelectric nanogenerators and its application in self-powered sensors. It covers the fundamentals of TENGs, various sensing applications including humidity, touch, gas, force, respiratory, and temperature sensing, and discusses the challenges and future prospects of TENG-based sensors. image