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Design of an Electrostatic Phase Shifting Device for Biological Transmission Electron Microscopy
KTH, School of Technology and Health (STH). Karolinska Institutet, Department of Biosciences and Nutrition, Novum, Huddinge, Sweden.ORCID iD: 0000-0002-0569-3374
2018 (English)In: Ultramicroscopy, ISSN 0304-3991, E-ISSN 1879-2723, Vol. 187, p. 107-112Article in journal (Refereed) Published
Abstract [en]

I suggest an electrostatic phase plate designed to broaden the contrast transfer function of a transmission electron microscope operated close to Scherzer defocus primarily in the low resolution direction. At higher defocus the low frequency behavior is equal to that close to Scherzer defocus, but CTF-correction becomes necessary to extend image interpretation to higher resolution. One simple realization of the phase plate consists of two ring shaped electrodes symmetrically surrounding the central beam. Since no physical components come into contact with the central beam and charge on the electrodes is controlled by an external voltage supply, problems with uncontrolled charging are expected to be reduced.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 187, p. 107-112
Keywords [en]
Phase contrast; Electrostatic phase plate; Weak phase object approximation; Transfer function;Transmission electron microscopy
National Category
Other Engineering and Technologies not elsewhere specified
Identifiers
URN: urn:nbn:se:kth:diva-224255DOI: 10.1016/j.ultramic.2018.01.008Scopus ID: 2-s2.0-85041515297OAI: oai:DiVA.org:kth-224255DiVA, id: diva2:1190656
Note

QC 20180319

Available from: 2018-03-15 Created: 2018-03-15 Last updated: 2018-03-19Bibliographically approved

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