Calibrating the atomic balance by carbon nanoclusters

Details Calibrating the atomic balance by carbon nanoclusters Calibrating the atomic balance by carbon nanoclusters

2010-12-03

arxiv.org/abs/1012.0651v1

APl 033103, Vol96, 2010

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

Carbon atoms are counted at near atomic-level precision using a scanning transmission electron microscope calibrated by carbon nanocluster mass standards. A linear calibration curve governs the working zone from a few carbon atoms up to 34,000 atoms. This linearity enables adequate averaging of the scattering cross sections, imparting the experiment with near atomic-level precision despite the use of a coarse mass reference. An example of this approach is provided for thin layers of stacked graphene sheets. Suspended sheets with a thickness below 100 nm are visualized, providing quantitative measurement in a regime inaccessible to optical and scanning probe methods.

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