A quantitative assessment of microelectrodes

Ultramicroscopy
Ralf Schlesiger, Guido Schmitz

Abstract

In order to improve the performance and applicability of atom probe tomography, the application of microelectrodes has been suggested and is realized in modern commercial instruments. In contrast to the original proposition by Nishikawa, in practical realization the down scaling of the microelectrode is limited to about 10microm due to the requirements of a stable measurement. In this work, the field enhancement by electrodes of this size was measured in the FIM mode and compared to finite element calculations of the electric field. The experimental data reveal considerable scattering between individual microelectrodes and specimen tips, but on the average the predictions by the finite element calculation are confirmed. Even a microelectrode of 50microm diameter yields a reasonable field enhancement close to a factor of two.

References

Jan 5, 2002·Ultramicroscopy·M HuangG D Smith
Jul 6, 2004·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Thomas F KellyDavid R Strait
Apr 3, 2007·Ultramicroscopy·K F RussellT Gribb
Apr 21, 2007·Ultramicroscopy·P StenderG Schmitz

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Citations

May 6, 2010·The Review of Scientific Instruments·Ralf SchlesigerGuido Schmitz
Apr 24, 2013·Ultramicroscopy·Francois VurpillotD J Larson
Jan 31, 2009·Ultramicroscopy·M GruberG Schmitz
Aug 26, 2011·Ultramicroscopy·F VurpillotA Bostel

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