Such friction-powered generators could usher new types of wearable sensors
that don't require batteries but instead are powered by the wearer's daily
activities like walking, talking or holding an object.
The new device, which researchers from the National University of Singapore
presented at the IEEE MEMS 2015 conference last week, can generate 90 volts of
open circuit voltage when touched gently with a finger. Electrical and computer
engineering professor Chengkuo Lee and his colleagues demonstrated that the new
device can be used as a wearable self-powered sensor to track the user's motion