Electron-stimulated desorption ofO+ions from a gas-covered CdS(0001) surface

1988 ◽  
Vol 38 (6) ◽  
pp. 3671-3675 ◽  
Author(s):  
E. C. Ekwelundu ◽  
A. Ignatiev
Keyword(s):  
Electron Stimulated Desorption

Electron-beam damage of oxides at high current densities

1989 ◽  
Vol 47 ◽  
pp. 634-635
Author(s):  
M. R. McCartney ◽  
J. K. Weiss ◽  
David J. Smith
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Current Density ◽  
Transition Metal Oxides ◽  
Time Resolved ◽  
Rapid Acquisition ◽  
Resolution Electron ◽  
Current Densities ◽  
Electron Stimulated Desorption ◽  
Channel Analyzer

It is well-known that electron-beam irradiation within the electron microscope can induce a variety of surface reactions. In the particular case of maximally-valent transition-metal oxides (TMO), which are susceptible to electron-stimulated desorption (ESD) of oxygen, it is apparent that the final reduced product depends, amongst other things, upon the ionicity of the original oxide, the energy and current density of the incident electrons, and the residual microscope vacuum. For example, when TMO are irradiated in a high-resolution electron microscope (HREM) at current densities of 5-50 A/cm2, epitaxial layers of the monoxide phase are found. In contrast, when these oxides are exposed to the extreme current density probe of an EM equipped with a field emission gun (FEG), the irradiated area has been reported to develop either holes or regions almost completely depleted of oxygen. ’ In this paper, we describe the responses of three TMO (WO3, V2O5 and TiO2) when irradiated by the focussed probe of a Philips 400ST FEG TEM, also equipped with a Gatan 666 Parallel Electron Energy Loss Spectrometer (P-EELS). The multi-channel analyzer of the spectrometer was modified to take advantage of the extremely rapid acquisition capabilities of the P-EELS to obtain time-resolved spectra of the oxides during the irradiation period. After irradiation, the specimens were immediately removed to a JEM-4000EX HREM for imaging of the damaged regions.

Electron Stimulated Desorption by Low Energy Ion Impact

1983 ◽  
Vol T6 ◽  
pp. 104-105 ◽  
Author(s):  
J Möller ◽  
M Neumann ◽  
W Heiland
Keyword(s):  
Low Energy ◽  
Ion Impact ◽  
Electron Stimulated Desorption

scholarly journals Electron-stimulated desorption from molecular ices in the 0.15–2 keV regime

2020 ◽  
Vol 128 (17) ◽  
pp. 175304
Author(s):  
R. Dupuy ◽  
M. Haubner ◽  
B. Henrist ◽  
J.-H. Fillion ◽  
V. Baglin
Keyword(s):  
Electron Stimulated Desorption
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