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On the role of the gas environment, electron-dose-rate, and sample on the image resolution in transmission electron microscopy

Ek, Martin LU orcid ; Jespersen, Sebastian P.F. ; Damsgaard, Christian D. and Helveg, Stig (2016) In Advanced Structural and Chemical Imaging 2(1).
Abstract

The introduction of gaseous atmospheres in transmission electron microscopy offers the possibility of studying materials in situ under chemically relevant environments. The presence of a gas environment can degrade the resolution. Surprisingly, this phenomenon has been shown to depend on the electron-dose-rate. In this article, we demonstrate that both the total and areal electron-dose-rates work as descriptors for the dose-rate-dependent resolution and are related through the illumination area. Furthermore, the resolution degradation was observed to occur gradually over time after initializing the illumination of the sample and gas by the electron beam. The resolution was also observed to be sensitive to the electrical conductivity of... (More)

The introduction of gaseous atmospheres in transmission electron microscopy offers the possibility of studying materials in situ under chemically relevant environments. The presence of a gas environment can degrade the resolution. Surprisingly, this phenomenon has been shown to depend on the electron-dose-rate. In this article, we demonstrate that both the total and areal electron-dose-rates work as descriptors for the dose-rate-dependent resolution and are related through the illumination area. Furthermore, the resolution degradation was observed to occur gradually over time after initializing the illumination of the sample and gas by the electron beam. The resolution was also observed to be sensitive to the electrical conductivity of the sample. These observations can be explained by a charge buildup over the electron-illuminated sample area, caused by the beam–gas–sample interaction, and by a subsequent sample motion induced by electrical capacitance in the sample.

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author
; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Sample charging, Transmission electron microscopy, TEM, Resolution, Dose-rate, In situ, Gas environment
in
Advanced Structural and Chemical Imaging
volume
2
issue
1
article number
4
publisher
Springer
external identifiers
  • scopus:85017472485
ISSN
2198-0926
DOI
10.1186/s40679-016-0018-x
language
English
LU publication?
no
id
d794f0cf-fae4-4406-b119-88b0b97f1341
date added to LUP
2023-12-07 09:20:57
date last changed
2023-12-07 10:56:27
@article{d794f0cf-fae4-4406-b119-88b0b97f1341,
  abstract     = {{<p>The introduction of gaseous atmospheres in transmission electron microscopy offers the possibility of studying materials in situ under chemically relevant environments. The presence of a gas environment can degrade the resolution. Surprisingly, this phenomenon has been shown to depend on the electron-dose-rate. In this article, we demonstrate that both the total and areal electron-dose-rates work as descriptors for the dose-rate-dependent resolution and are related through the illumination area. Furthermore, the resolution degradation was observed to occur gradually over time after initializing the illumination of the sample and gas by the electron beam. The resolution was also observed to be sensitive to the electrical conductivity of the sample. These observations can be explained by a charge buildup over the electron-illuminated sample area, caused by the beam–gas–sample interaction, and by a subsequent sample motion induced by electrical capacitance in the sample.</p>}},
  author       = {{Ek, Martin and Jespersen, Sebastian P.F. and Damsgaard, Christian D. and Helveg, Stig}},
  issn         = {{2198-0926}},
  keywords     = {{Sample charging; Transmission electron microscopy; TEM; Resolution; Dose-rate; In situ; Gas environment}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{1}},
  publisher    = {{Springer}},
  series       = {{Advanced Structural and Chemical Imaging}},
  title        = {{On the role of the gas environment, electron-dose-rate, and sample on the image resolution in transmission electron microscopy}},
  url          = {{http://dx.doi.org/10.1186/s40679-016-0018-x}},
  doi          = {{10.1186/s40679-016-0018-x}},
  volume       = {{2}},
  year         = {{2016}},
}