Piezoresistive sponges represent a popular design for highly flexible pressure sensors and are typically fabricated using templating methods. In this work, we used stereolithography (SLA) to 3D-print an elastomeric body-centered cubic (BCC) lattice structure with a relative density of 21% and an elastic modulus of 31.5 kPa. The lattice was dip-coated with graphene nanoplatelets to realize a piezoresistive pressure sensor with excellent performance (gauge factor = 3.25, sensitivity = 0.1 kPa-1), high deformability (up to 60 % strain), and repeatability. The novel approach outlined in this work offers greater control over the microstructure and can be used to fabricate sensors with tunable properties.
|Publication status||Accepted/In press - 27-Apr-2021|
|Event||Transducers 2021: The 21st International Conference on Solid-State Sensors, Actuators and Microsystems - Virtual|
Duration: 20-Jun-2021 → 25-Jun-2021
|Period||20/06/2021 → 25/06/2021|