On the role of the gas environment, electron-dose-rate, and sample on the image resolution in transmission electron microscopy
(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.
(Less)
- author
- Ek, Martin LU ; Jespersen, Sebastian P.F. ; Damsgaard, Christian D. and Helveg, Stig
- publishing date
- 2016-01-01
- 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}}, }