A short story of imaging and spectroscopy of two-dimensional materials by scanning transmission electron microscopy

Idrobo Tapia, Juan Carlos; Zhou, Wu

doi:10.1016/j.ultramic.2017.02.002

A short story of imaging and spectroscopy of two-dimensional materials by scanning transmission electron microscopy

Journal Article · Wed Mar 01 00:00:00 EST 2017 · Ultramicroscopy

DOI:https://doi.org/10.1016/j.ultramic.2017.02.002· OSTI ID:1350940

Idrobo Tapia, Juan Carlos ^[1]; Zhou, Wu ^[2]

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.

View Accepted Manuscript (DOE)

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); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1350940

Alternate ID(s):: OSTI ID: 22741447
OSTI ID: 1495517

Journal Information:: Ultramicroscopy, Journal Name: Ultramicroscopy Vol. 180; ISSN 0304-3991

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited By (2)

Modelling relativistic effects in momentum-resolved electron energy loss spectroscopy of graphene Lyon, K.; Mowbray, D. J.; Miskovic, Z. L. Radiation Effects and Defects in Solids, Vol. 173, Issue 1-2 https://doi.org/10.1080/10420150.2018.1442456	journal	February 2018
Energy losses and transition radiation in graphene traversed by a fast charged particle under oblique incidence Akbari, Kamran; Segui, Silvina; Mišković, Zoran L. Physical Review B, Vol. 98, Issue 19 https://doi.org/10.1103/physrevb.98.195410	journal	November 2018

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