Improving fabrication and application of Zach phase plates for phase-contrast transmission electron microscopy.
Microsc Microanal
; 18(5): 1010-5, 2012 Oct.
Article
en En
| MEDLINE
| ID: mdl-23058718
ABSTRACT
Zach phase plates (PPs) are promising devices to enhance phase contrast in transmission electron microscopy. The Zach PP shifts the phase of the zero-order beam by a strongly localized inhomogeneous electrostatic potential in the back focal plane of the objective lens. We present substantial improvements of the Zach PP, which overcome previous limitations. The implementation of a microstructured heating device significantly reduces contamination and charging of the PP structure and extends its lifetime. An improved production process allows fabricating PPs with reduced dimensions resulting in lower cut-on frequencies as revealed by simulations of the electrostatic potential. Phase contrast with inversion of PbSe nanoparticles is demonstrated in a standard transmission electron microscope with LaB6 cathode by applying different voltages.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Microsc Microanal
Año:
2012
Tipo del documento:
Article
País de afiliación:
Alemania