Broad background in electron diffraction of 2D materials as a signature of their superior quality
Abstract
Abstract An unusually broad bell-shaped component (BSC) has been previously observed in surface electron diffraction on different types of 2D systems. It was suggested to be an indicator of uniformity of epitaxial graphene (Gr) and hexagonal boron nitride (hBN). In the current study we use low-energy electron microscopy and micro-diffraction to directly relate the BSC to the crystal quality of the diffracting 2D material. Specially designed lateral heterostructures were used to map the spatial evolution of the diffraction profile across different 2D materials, namely pure hBN, BCN alloy and pure Gr, where the alloy region exhibits deteriorated structural coherency. The presented results show that the BSC intensity has a minimum in the alloyed region, consequently showing that BSC is sensitive to the lateral domain size and homogeneity of the material under examination. This is further confirmed by the presence of a larger number of sharp moiré spots when the BSC is most pronounced in the pure hBN and Gr regions. Consequently, it is proposed that the BSC can be used as a diagnostic tool for determining the quality of the 2D materials.
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1841283
- Alternate Identifier(s):
- OSTI ID: 1827101
- Report Number(s):
- IS-J-10,603
Journal ID: ISSN 0957-4484
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Published Article
- Journal Name:
- Nanotechnology
- Additional Journal Information:
- Journal Name: Nanotechnology Journal Volume: 32 Journal Issue: 50; Journal ID: ISSN 0957-4484
- Publisher:
- IOP Publishing
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; graphene; hexagonal boron nitride; BCN alloy; lateral heterostructure; LEED; bell-shaped component
Citation Formats
Petrović, Marin, Meyer zu Heringdorf, Frank J., Hoegen, Michael Horn-von, Thiel, Patricia A., and Tringides, Michael C. Broad background in electron diffraction of 2D materials as a signature of their superior quality. United Kingdom: N. p., 2021.
Web. doi:10.1088/1361-6528/ac244f.
Petrović, Marin, Meyer zu Heringdorf, Frank J., Hoegen, Michael Horn-von, Thiel, Patricia A., & Tringides, Michael C. Broad background in electron diffraction of 2D materials as a signature of their superior quality. United Kingdom. https://doi.org/10.1088/1361-6528/ac244f
Petrović, Marin, Meyer zu Heringdorf, Frank J., Hoegen, Michael Horn-von, Thiel, Patricia A., and Tringides, Michael C. Mon .
"Broad background in electron diffraction of 2D materials as a signature of their superior quality". United Kingdom. https://doi.org/10.1088/1361-6528/ac244f.
@article{osti_1841283,
title = {Broad background in electron diffraction of 2D materials as a signature of their superior quality},
author = {Petrović, Marin and Meyer zu Heringdorf, Frank J. and Hoegen, Michael Horn-von and Thiel, Patricia A. and Tringides, Michael C.},
abstractNote = {Abstract An unusually broad bell-shaped component (BSC) has been previously observed in surface electron diffraction on different types of 2D systems. It was suggested to be an indicator of uniformity of epitaxial graphene (Gr) and hexagonal boron nitride (hBN). In the current study we use low-energy electron microscopy and micro-diffraction to directly relate the BSC to the crystal quality of the diffracting 2D material. Specially designed lateral heterostructures were used to map the spatial evolution of the diffraction profile across different 2D materials, namely pure hBN, BCN alloy and pure Gr, where the alloy region exhibits deteriorated structural coherency. The presented results show that the BSC intensity has a minimum in the alloyed region, consequently showing that BSC is sensitive to the lateral domain size and homogeneity of the material under examination. This is further confirmed by the presence of a larger number of sharp moiré spots when the BSC is most pronounced in the pure hBN and Gr regions. Consequently, it is proposed that the BSC can be used as a diagnostic tool for determining the quality of the 2D materials.},
doi = {10.1088/1361-6528/ac244f},
journal = {Nanotechnology},
number = 50,
volume = 32,
place = {United Kingdom},
year = {Mon Sep 27 00:00:00 EDT 2021},
month = {Mon Sep 27 00:00:00 EDT 2021}
}
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