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New Electrostatic Phase Plate for Phase-Contrast Transmission Electron Microscopy and Its Application for Wave-Function Reconstruction

Published online by Cambridge University Press:  15 October 2010

Katrin Schultheiss ,
Joachim Zach ,
Bjoern Gamm ,
Manuel Dries ,
Nicole Frindt ,
Rasmus R. Schröder  and
Dagmar Gerthsen
Katrin Schultheiss*
Affiliation:
Laboratorium für Elektronenmikroskopie, Karlsruher Institut für Technologie (KIT), D-76128 Karlsruhe, Germany
Joachim Zach
Affiliation:
CEOS GmbH, Englerstr. 28, D-69126 Heidelberg, Germany
Bjoern Gamm
Affiliation:
Laboratorium für Elektronenmikroskopie, Karlsruher Institut für Technologie (KIT), D-76128 Karlsruhe, Germany
Manuel Dries
Affiliation:
Laboratorium für Elektronenmikroskopie, Karlsruher Institut für Technologie (KIT), D-76128 Karlsruhe, Germany
Nicole Frindt
Affiliation:
Bioquant Cell Networks, Universität Heidelberg, D-69120 Heidelberg, Germany
Rasmus R. Schröder
Affiliation:
Bioquant Cell Networks, Universität Heidelberg, D-69120 Heidelberg, Germany
Dagmar Gerthsen
Affiliation:
Laboratorium für Elektronenmikroskopie, Karlsruher Institut für Technologie (KIT), D-76128 Karlsruhe, Germany
*
Corresponding author. E-mail: katrin.schultheiss@kit.edu
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Abstract

A promising novel type of electrostatic phase plate for transmission electron microscopy (TEM) is presented. The phase plate consists of a single microcoaxial cable-like rod with its electrode exposed to the undiffracted electrons. The emerging field is used to shift the phase of the undiffracted electrons with respect to diffracted electrons. The design overcomes the drawback of the spatial frequency-blocking ring electrode of the Boersch phase plate. First, experimental phase-contrast images are presented for PbSe and Pt nanoparticles with clearly varying phase contrast, which depends on the applied voltage and resulting phase shift of the unscattered electrons. With the new phase-plate design, we show for the first time the reconstruction of an object wave function based on a series of only three experimental phase-contrast TEM images obtained with an electrostatic phase plate.

Keywords

phase plateelectrostatic phase platetransmission electron microscopywave-function reconstructionphase contrast
Type
Instrumentation and Software Developments
Information
Microscopy and Microanalysis , Volume 16 , Issue 6 , December 2010 , pp. 785 - 794
Copyright
Copyright © Microscopy Society of America 2010

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References

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