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Many types of smart devices are readily available and convenient to use. The goal now is to make wearable electronics that are flexible, sustainable, and powered by ambient renewable energy. This last goal inspired researchers to explore how the attractive physical features of zinc oxide (ZnO) materials could be used to tap into abundant mechanical energy sources to power micro devices.

They discovered that inserting aluminum nitride insulating layers into ZnO-based energy harvesting devices led to a significant improvement of the devices’ performance. The group’s findings are expected to provide an effective approach for realizing “nanogenerators” for self-powered electronic systems such as portable communication devices, healthcare monitoring devices, environmental monitoring devices, and implantable medical devices.

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