Detection of individual gas molecules adsorbed on graphene.

  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},
  volume={6 9},
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… 

Chemically Derived Graphene for Sub-ppm Nitrogen Dioxide Detection

One of the most extraordinary properties of the graphene, the high sensitivity to the adsorption/desorption of gas molecule, is still at the very beginning of its exploitation. The ability to detect

Graphene nanoelectronic heterodyne sensor for rapid and sensitive vapour detection.

This work reports a fundamentally different sensing mechanism based on molecular dipole detection enabled by a pioneering graphene nanoelectronic heterodyne sensor that achieves rapid and sensitive detection of a wide range of vapour analytes.

Detection of individual CO2 molecules adsorption with suspended graphene in an electrical field

We report the sensing of carbon dioxide at the extreme resolution, I.e. the detection of an individual molecular adsorption event. We design a novel architecture of suspended graphene device, where

Gas identification with graphene plasmons

Identification of gas molecules plays a key role a wide range of applications extending from healthcare to security. However, the most widely used gas nano-sensors are based on electrical approaches

The selective low cost gas sensor based on functionalized graphene

Recent advances in nanomaterials provided a strong potential to create a gas sensor with many advantages such as high sensitivity of single molecule detection, low cost, and low power consumption.

Enhancing the sensitivity and selectivity of pyrene-based sensors for detection of small gaseous molecules via destructive quantum interference

Graphene-based sensors are exceptionally sensitive with high carrier mobility and low intrinsic noise, and have been intensively investigated in the past decade. The detection of individual gas

Edge-Selective Gas Detection Using Langmuir Films of Graphene Platelets.

The use of Langmuir-Schaefer deposition is demonstrated to produce functional gas sensors, using a chemiresistor structure from commercially available graphene dispersions, and it is demonstrated that Arrhenius fitting of Desorption response potentially allows measurements of desorption process activation energies for gas molecules adsorbed onto the graphene nanosheets.

Defect-free functionalized graphene sensor for formaldehyde detection

The results highlight that defect-free functionalization based on organic molecules not only increases the sensor's response but also its selectivity, paving the way to the design of efficient graphene-based sensors.

Understanding and optimization of graphene gas sensors

Graphene holds great promise in gas sensor applications due to its excellent electrical transport properties and extraordinarily large surface-to-bulk ratio, rendering the whole atomic-thin films



Molecular doping of graphene.

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.

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.

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

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

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

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.

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.