Large amplitude charge noise and random telegraph fluctuations in room-temperature graphene single-electron transistors

gating device trapping charges at the disordered graphene edges for tuning

The quantum research group, led by Professor Andrew Briggs, has collaborated with Queen Mary University of London and the Center for Nanophase Materials Sciences at Oak Ridge National Laboratory to observe noise in a liquid environment. 

This paper produces their findings when using a charge noise model to consider fluctuations in the applied source-drain and gate potentials, and how trapping/detrapping individual charges enables tuning by gating the device, which can result in stable two-level fluctuations in the measured content.

These results have important implications for the use of electronic graphene nanodevices in single-molecule biosensing.