Dear Colleagues,

The demand for alternative energy harvesting approaches (small and large scale) is increasing day-by-day due to industrialization in every sector, the tremendous growth of the population, and the development of automated lifestyles. Human lives are in danger due to the massive consumption of natural resources and the catastrophic increase in environmental pollution. To control this, renewable technologies such as solar cells, fuel cells, and hydrogen energy processes have been developed; however, they are unable to utilize the abundant amount of mechanical energy waste produced by society. A new energy harvesting approach is required to harness energy from biomechanical motion, ocean waves, and wind motion. Triboelectric, piezoelectric energy harvesting systems show the way to generate clean energy, and fabricated devices can use a micro-power source to drive low-power-consuming sensors and systems. Sometimes, nanogenerators can play a dual role, such as energy harvesting and active sensing, to monitor various physical, chemical, and biological stimuli. Here, the performance of all of these technologies mainly depends on the design and development of efficient nanomaterials, ceramics, polymers, composite materials, and novel design architectures. To reach this goal, new synthesis routes, flexible in-device designs, cost-effectiveness, and improvement in the power density of devices is highly necessary.

For this Special Issue of Sensors, we aim to present a collection of review and original research articles related to the development of micro energy harvesters as well as sensors. We invite scientists and academic researchers across the globe to contribute relevant articles.

Dr. Fabio Viola
Leading Guest Editor

Dr. Nagamalleswara Rao Alluri
Guest Editor

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• piezoelectric materials
• 2D materials
• ferroelectric materials
• self-powered sensors
• piezoelectric nanogenerator
• triboelectric nanogenerator
• piezo-phototronic effect
• MEMS sensors