Monolayer graphene exhibits exceptional electronic
and mechanical properties, making it a very promising
material for nanoelectromechanical devices. Here, we conclusively
demonstrate the piezoresistive effect in graphene in a
nanoelectromechanical membrane configuration that provides
direct electrical readout of pressure to strain transduction. This
makes it highly relevant for an important class of nanoelectromechanical
system (NEMS) transducers. This demonstration
is consistent with our simulations and previously
reported gauge factors and simulation values. The membrane
in our experiment acts as a strain gauge independent of
crystallographic orientation and allows for aggressive size
scalability. When compared with conventional pressure
sensors, the sensors have orders of magnitude higher sensitivity per unit area.
