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Titel: Theory of the spatial resolution of (scanning) transmission electron microscopy in liquid water or ice layers
VerfasserIn: de Jonge, Niels
Sprache: Englisch
Titel: Ultramicroscopy
Bandnummer: 187
Startseite: 113
Endseite: 125
Verlag/Plattform: Elsevier
Erscheinungsjahr: 2018
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: The sample dependent spatial resolution was calculated for transmission electron microscopy (TEM) and scanning TEM (STEM) of objects (e.g., nanoparticles, proteins) embedded in a layer of liquid water or amorphous ice. The theoretical model includes elastic- and inelastic scattering, beam broadening, and chromatic aberration. Different contrast mechanisms were evaluated as function of the electron dose, the detection angle, and the sample configuration. It was found that the spatial resolution scales with the electron dose to the -1/4th power. Gold- and carbon nanoparticles were examined in the middle of water layers ranging from 0.01--10 µm thickness representing relevant classes of experiments in both materials science and biology. The optimal microscope settings differ between experimental configurations. STEM performs the best for gold nanoparticles for all layer thicknesses, while carbon is best imaged with phase-contrast TEM for thin layers but bright field STEM is preferred for thicker layers. The resolution was also calculated for a water layer enclosed between thin membranes. The influence of chromatic aberration correction for TEM was examined as well. The theory is broadly applicable to other types of materials and sample configurations.
DOI der Erstveröffentlichung: 10.1016/j.ultramic.2018.01.007
Link zu diesem Datensatz: hdl:20.500.11880/28061
http://dx.doi.org/10.22028/D291-29243
ISSN: 1879-2723
0304-3991
Datum des Eintrags: 10-Okt-2019
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Physik
Professur: NT - Keiner Professur zugeordnet
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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