This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1088/0022-3727/49/29/294003 in citations.
Please use the identifier: http://hdl.handle.net/2128/14647 in citations.
Local charge measurement using off-axis electron holography
Local charge measurement using off-axis electron holography
A model-independent approach based on Gauss' theorem for measuring the local charge in a specimen from an electron-optical phase image recorded using off-axis electron holography was recently proposed. Here, we show that such a charge measurement is reliable when it is applied to determine the...
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Personal Name(s): | Beleggia, M. (Corresponding author) |
---|---|
Gontard, L. C. / Dunin-Borkowski, Rafal | |
Contributing Institute: |
Mikrostrukturforschung; PGI-5 |
Published in: | Journal of physics / D, 49 (2016) 29, S. 294003 |
Imprint: |
Bristol
IOP Publ.
2016
|
DOI: |
10.1088/0022-3727/49/29/294003 |
Document Type: |
Journal Article |
Research Program: |
Controlling Configuration-Based Phenomena |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/14647 in citations.
A model-independent approach based on Gauss' theorem for measuring the local charge in a specimen from an electron-optical phase image recorded using off-axis electron holography was recently proposed. Here, we show that such a charge measurement is reliable when it is applied to determine the total charge enclosed within an object. However, the situation is more complicated for a partial charge measurement when the integration domain encloses only part of the object. We analyze in detail the effects on charge measurement of the mean inner potential of the object, of the presence of induced charges on nearby supports/electrodes and of noise. We perform calculations for spherical particles and highlight the differences when dealing with other object shapes. Our analysis is tested using numerical simulations and applied to the interpretation of an experimental dataset recorded from a sapphire particle. |