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Title: Exploring the capabilities of monochromated electron energy loss spectroscopy in the infrared regime

Abstract

Here, monochromated electron energy loss spectroscopy (EELS) is one of the leading techniques to study materials properties that correspond to low (<5 eV) energy losses (i.e. band-gaps, plasmons, and excitons) with nanoscale spatial resolution. Recently a new generation of monochromators have become available, opening regimes and unlocking excitations that were previously unobservable in the electron microscope. The capabilities of these new instruments are still being explored, and here we study the effect of monochromation on various aspects of EELS analysis in the infrared (<1 eV) regime. We investigate the effect of varying levels of monochromation on energy resolution, zero-loss peak (ZLP) tail reduction, ZLP tail shape, signal-to-noise-ratio, and spatial resolution. From these experiments, the new capabilities of monochromated EELS are shown to be highly promising for the future of localized spectroscopic analysis.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1489598
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Hachtel, Jordan A., Lupini, Andrew R., and Idrobo, Juan Carlos. Exploring the capabilities of monochromated electron energy loss spectroscopy in the infrared regime. United States: N. p., 2018. Web. doi:10.1038/s41598-018-23805-5.
Hachtel, Jordan A., Lupini, Andrew R., & Idrobo, Juan Carlos. Exploring the capabilities of monochromated electron energy loss spectroscopy in the infrared regime. United States. doi:10.1038/s41598-018-23805-5.
Hachtel, Jordan A., Lupini, Andrew R., and Idrobo, Juan Carlos. Wed . "Exploring the capabilities of monochromated electron energy loss spectroscopy in the infrared regime". United States. doi:10.1038/s41598-018-23805-5. https://www.osti.gov/servlets/purl/1489598.
@article{osti_1489598,
title = {Exploring the capabilities of monochromated electron energy loss spectroscopy in the infrared regime},
author = {Hachtel, Jordan A. and Lupini, Andrew R. and Idrobo, Juan Carlos},
abstractNote = {Here, monochromated electron energy loss spectroscopy (EELS) is one of the leading techniques to study materials properties that correspond to low (<5 eV) energy losses (i.e. band-gaps, plasmons, and excitons) with nanoscale spatial resolution. Recently a new generation of monochromators have become available, opening regimes and unlocking excitations that were previously unobservable in the electron microscope. The capabilities of these new instruments are still being explored, and here we study the effect of monochromation on various aspects of EELS analysis in the infrared (<1 eV) regime. We investigate the effect of varying levels of monochromation on energy resolution, zero-loss peak (ZLP) tail reduction, ZLP tail shape, signal-to-noise-ratio, and spatial resolution. From these experiments, the new capabilities of monochromated EELS are shown to be highly promising for the future of localized spectroscopic analysis.},
doi = {10.1038/s41598-018-23805-5},
journal = {Scientific Reports},
number = 1,
volume = 8,
place = {United States},
year = {2018},
month = {4}
}

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Cited by: 6 works
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Figures / Tables:

Figure 1 Figure 1: Electron energy loss spectroscopy and monochromation. (a) Schematic of electron energy-loss spectroscopy (EELS) experiment in a scanning transmission electron microscope (STEM). (b) Schematic of monochromation of electron beam (occurring between the electron gun and the condenser lenses)

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