Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-08-31
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.
Han Min
He Longbing
Li Ziyou
Song Fengqi
Wang Guanghou
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