Detection of individual gas molecules adsorbed on graphene.

@article{Schedin2007DetectionOI,
  title={Detection of individual gas molecules adsorbed on graphene.},
  author={Fred Schedin and SUPARNA DUTTASINHA and Sergei V. Morozov and Ernie W. Hill and Peter Blake and Mikhail I. Katsnelson and Kostya S. Novoselov},
  journal={Nature materials},
  year={2007},
  volume={6 9},
  pages={
          652-5
        }
}
The ultimate aim of any detection method is to achieve such a level of sensitivity that individual quanta of a measured entity can be resolved. In the case of chemical sensors, the quantum is one atom or molecule. Such resolution has so far been beyond the reach of any detection technique, including solid-state gas sensors hailed for their exceptional sensitivity. The fundamental reason limiting the resolution of such sensors is fluctuations due to thermal motion of charges and defects, which… 

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References

SHOWING 1-10 OF 39 REFERENCES

Molecular doping of graphene.

TLDR
This letter presents the first joint experimental and theoretical investigation of adsorbate-induced doping of graphene, and shows that this peculiar density of states (DOS) of graphene is ideal for "chemical sensor" applications and explains the recently observed NO2 single molecule detection.

Transport in chemically doped graphene in the presence of adsorbed molecules

Motivated by a recent experiment reporting on the possible application of graphene as sensors, we calculate transport properties of two-dimensional graphene monolayers in the presence of adsorbed

Detection limits for nanoscale biosensors.

TLDR
The calculations reveal that reported femtomolar detection limits for biomolecular assays are very likely an analyte transport limitation, not a signal transduction limitation.

The rise of graphene.

TLDR
Owing to its unusual electronic spectrum, graphene has led to the emergence of a new paradigm of 'relativistic' condensed-matter physics, where quantum relativistic phenomena can now be mimicked and tested in table-top experiments.

Mechanism of NO2 detection in carbon nanotube field effect transistor chemical sensors

We report an experimental method that clearly determines the sensing mechanism of carbon-nanotube field effect transistors. The nanotube/electrode contacts are covered with a thick and long

The structure of suspended graphene sheets

TLDR
These studies by transmission electron microscopy reveal that individual graphene sheets freely suspended on a microfabricated scaffold in vacuum or air are not perfectly flat: they exhibit intrinsic microscopic roughening such that the surface normal varies by several degrees and out-of-plane deformations reach 1 nm.

Nanotube molecular wires as chemical sensors

TLDR
The nanotubes sensors exhibit a fast response and a substantially higher sensitivity than that of existing solid-state sensors at room temperature and the mechanisms of molecular sensing with nanotube molecular wires are investigated.

Experimental observation of the quantum Hall effect and Berry's phase in graphene

TLDR
An experimental investigation of magneto-transport in a high-mobility single layer of graphene observes an unusual half-integer quantum Hall effect for both electron and hole carriers in graphene.

Charge transfer from ammonia physisorbed on nanotubes.

TLDR
The use of nanotube field-effect transistor devices for chemical sensing in a conducting liquid environment and the amount of charge estimated to be as small as 40 electrons for the smallest shift detected is reported.