A short story of imaging and spectroscopy of two-dimensional materials by scanning transmission electron microscopy
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Chinese Academy of Science, Beijing (China)
Here we present a short historical account of when single adatom impurities where first identified in two-dimensional materials by scanning transmission electron microscopy (STEM). We also present a study of the graphene low-loss (below 50 eV) response as a function of number of layers using electron energy-loss spectroscopy (EELS). The study shows that as few as three layers of graphene behave as bulk graphite for losses above 10 eV We also show examples of how point and extended defects can easily be resolved and structural dynamics can be readily capture by using aberration-corrected STEM imaging. Lastly, we show that the new generation of monochromators has opened up possibilities to explore new physics with an electron microscope. All these capabilities were enabled by the development of spherical aberration correctors and monochromators, where Ondrej Krivanek has played a key role.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1350940
- Alternate ID(s):
- OSTI ID: 1495517
- Journal Information:
- Ultramicroscopy, Vol. 180; ISSN 0304-3991
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Modelling relativistic effects in momentum-resolved electron energy loss spectroscopy of graphene
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journal | February 2018 |
Energy losses and transition radiation in graphene traversed by a fast charged particle under oblique incidence
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journal | November 2018 |
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