Large amplitude charge noise and random telegraph fluctuations in room-temperature graphene single-electron transistors
Fried, Bian, Swett, Kravchenko, Briggs, Mol (2020) Large amplitude charge noise and random telegraph fluctuations in room-temperature graphene single-electron transistors Nanoscale (IF: 6.7) 12(2) 871-876Abstract
We analyze the noise in liquid-gated, room temperature, graphene quantum dots. These devices display extremely large noise amplitudes. The observed noise is explained in terms of a charge noise model by considering fluctuations in the applied source-drain and gate potentials. We show that the liquid environment and substrate have little effect on the observed noise and as such attribute the noise to charge trapping/detrapping at the disordered graphene edges. The trapping/detrapping of individual charges can be tuned by gating the device, which can result in stable two-level fluctuations in the measured current. These results have important implications for the use of electronic graphene nanodevices in single-molecule biosensing.
Links
http://www.ncbi.nlm.nih.gov/pubmed/31833518http://dx.doi.org/10.1039/c9nr08574b
