3D printed graphene-coated flexible lattice as piezoresistive pressure sensor

Amar M Kamat*, Ajay Giri Prakash Kottapalli

*Corresponding author for this work

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Abstract

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.
Original languageEnglish
Title of host publication2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS)
PublisherIEEE
Pages888-891
Number of pages4
ISBN (Electronic)978-0-7381-2562-6
Publication statusPublished - 2021

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