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Letter

Nature Materials 6, 652–655 (1 September 2007) | doi:10.1038/nmat1967

Detection of individual gas molecules adsorbed on graphene

F. Schedin , A. K. Geim , S. V. Morozov , E. W. Hill , P. Blake , M. I. Katsnelson & K. S. Novoselov

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.