Sensitive capacitive pressure sensors based on graphene membrane arrays

Makars Šiškins, Martin Lee, Dominique Wehenkel, Richard van Rijn, Tijmen W. de Jong, Johannes R. Renshof, Berend C. Hopman, Willemijn S. J. M. Peters, Dejan Davidovikj, Herre S. J. van der Zant, Peter G. Steeneken
2020 Microsystems & Nanoengineering  
AbstractThe high flexibility, impermeability and strength of graphene membranes are key properties that can enable the next generation of nanomechanical sensors. However, for capacitive pressure sensors, the sensitivity offered by a single suspended graphene membrane is too small to compete with commercial sensors. Here, we realize highly sensitive capacitive pressure sensors consisting of arrays of nearly ten thousand small, freestanding double-layer graphene membranes. We fabricate large
more » ... s of small-diameter membranes using a procedure that maintains the superior material and mechanical properties of graphene, even after high-temperature annealing. These sensors are readout using a low-cost battery-powered circuit board, with a responsivity of up to $$47.8$$ 47.8 aF Pa−1 mm−2, thereby outperforming the commercial sensors.
doi:10.1038/s41378-020-00212-3 pmid:34567711 pmcid:PMC8433463 fatcat:2k2osahtxvdb7jx35qduihyun4