‘Switch-on’ phenomena in field-electron and field-ion microscopy

Mousa, Marwan S.; Karpowicz, A.; Surma, S.

doi:10.1016/0042-207x(94)90182-1

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…This technology now makes it possible to prepare a cathode tip with a diameter of several nanometers. Composite micro-point cathodes have been prepared, with the aims of improving the emission characteristics needed for small bright electron sources, and reducing degradation of the electron emitter due to ion sputtering during emission (hence improving lifetime) (AlQudah et al, 2015;Latham & Mousa, 1986;Mousa, 1990;Mousa et al, 1994Mousa et al, , 2012Mousa & Al Share, 1999). The research reported here continues this work on composite micro-point cathodes.…”

Section: Introductionmentioning

confidence: 55%

The Effects of Dielectric Coatings on Electron Emission from Tungsten

Al-Qudah

Alnawasreh

Madanat

et al. 2017

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Field electron emission measurements were performed on dielectric-coated tungsten emitters, with apex radii in the nanometer and micrometer range, which were prepared by electrochemical etching in NaOH solution. Measurements were performed in a field electron microscopy (FEM) with a base pressure <10 -6 Pascal (10 -8 mbar). Four different types of dielectric were used, namely: (1) Clark Electromedical Instruments epoxylite resin, (2) Epidian 6 produced by Ciech Sarzyna S. A., (3) a Radionox solution of colloidal graphite; and (4) Molyslip 2001 E compound (MoS 2 and MoS). Currentvoltage measurements and FEM images were used to investigate the characteristics of these composite emitters, and to assess how the different types of dielectric coating affect the suitability of the composite emitter as a potential electron source.

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