Abstract
We developed a flexible force sensor consisting of 3D graphene foam (GF) encapsulated in
flexible polydimethylsiloxane (PDMS). Because the 3D GF/PDMS sensor is based on the
transformation of an electronic band structure aroused by static mechanical strain or KHz
vibration, it can detect frequency signals by both tuning fork tests and piezoelectric
ceramic transducer tests, which showed a clear linear response from audio frequencies,
including frequencies up to 141 KHz in the ultrasound range. Because of their excellent
response with a wide bandwidth, the 3D GF/PDMS sensors are attractive for interactive
wearable devices or artificial prosthetics capable of perceiving seismic waves, ultrasonic
waves, shock waves, and transient pressures.