Free-standing Graphene as Gold Standard

Details Free-standing Graphene as Gold Standard Free-standing Graphene as Gold Standard

2010-08-31

arxiv.org/abs/1008.5233v1

Ultramicroscopy, vol 110, pp1460-1464,2010

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We demonstrate using graphene sheets as a novel mass standard in the scanning transmission electron microscopy (STEM) based mass spectrometry. Here, free-standing graphene sheets are investigated by STEM. The discrete number of graphene layers enables an accurate calibration of STEM intensity, as performed over an extended thickness and with single atomic layer sensitivity. This leads to the direct and accurate measurement of the electron mean free path. As an application, we gain the insight of carbon nanoparticles of complex structure.

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