Abstract
Inspired by microfluidics and microchannels, we demonstrate a new method based on graphene microfluidics and serpentine microchannels (GMSM) to fabricate and pattern graphene/polymer composite film for pressure and strain measurement. With several types of experiment paraments including concentration of graphene suspension, deposition frequency and width of microchannels, the resistance response of the sensors is measured as a function of mechanical stimulations. The pressure sensor exhibits the high sensitivity (maximum: 0.27 /MPa) with ultrawide range (0–3 MPa), fast response and recovery time (88 ms, 217 ms), good repeatability (250 cycles). For the strain sensor, high sensitivity (maximum: 60) with high deformation limits (75%), good repeatability (2000 cycles) have been achieved. Finally, some human bio-signals are measured, demonstrated that the sensors have good potential for human-motions detecting and health surveillance.
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