Effect of a low pressure low temperature hydrogen plasma on the work function of europium

AbstractThe aim of this work is the application of low-temperature low-pressure hydrogen plasma on artificially prepared corrosion layers, so called plasma chemical reduction. It is necessary to use samples with artificially prepared corrosion layers because it is impossible to use the real artifacts for fundamental research. The bronze was chosen as a sample material. Formation of corrosion layers on the bronze samples was carried out in concentrated hydrochloric acid vapors with the addition of sand. The radio-frequency hydrogen plasma was generated in the flowing regime at a pressure of 160 Pa. Different values of supplied power were chosen as well as different discharge modes: continuous or pulsed mode with varied duty cycles. By the combination of supplied power and mode factors, we selected two values of effective power. The process of plasma chemical reduction was monitored by optical emission spectroscopy (OES) and simultaneously, the sample temperature was measured. Rotational temperatures were calculated from OH radicals spectra. Changes in the structure and elemental composition were determined using scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX).

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Application of low pressure capacitively coupled rf hydrogen plasma for low temperature reduction of iron clusters in structure of fe-pillared materials

Journal of Physics Conference Series ◽

10.1088/1742-6596/789/1/012057 ◽

2017 ◽

Vol 789 ◽

pp. 012057

Author(s):

V L Starshinova ◽

V E Gorelysheva ◽

A A Shinkarev ◽

S G Gnevashev ◽

G N Kulevtsov ◽

...

Keyword(s):

Low Temperature ◽

Hydrogen Plasma ◽

Low Pressure ◽

Iron Clusters ◽

Capacitively Coupled ◽

Temperature Reduction ◽

Reduction Of Iron ◽

Low Temperature Reduction

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Work function performance of a C12A7 electride surface exposed to low pressure low temperature hydrogen plasmas

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/6.0000749 ◽

2021 ◽

Vol 39 (1) ◽

pp. 013002

Author(s):

A. Heiler ◽

K. Waetzig ◽

M. Tajmar ◽

R. Friedl ◽

R. Nocentini ◽

...

Keyword(s):

Low Temperature ◽

Work Function ◽

Low Pressure ◽

Hydrogen Plasmas

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Field ion microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100104236 ◽

1988 ◽

Vol 46 ◽

pp. 434-435

Author(s):

Gert Ehrlich

Keyword(s):

Low Temperature ◽

Sample Surface ◽

Low Pressure ◽

Radius Of Curvature ◽

Field Ion Microscopy ◽

Phosphor Screen ◽

Ion Microscopy ◽

Field Ion Microscope

The field ion microscope, devised by Erwin Muller in the 1950's, was the first instrument to depict the structure of surfaces in atomic detail. An FIM image of a (111) plane of tungsten (Fig.l) is typical of what can be done by this microscope: for this small plane, every atom, at a separation of 4.48Å from its neighbors in the plane, is revealed. The image of the plane is highly enlarged, as it is projected on a phosphor screen with a radius of curvature more than a million times that of the sample. Müller achieved the resolution necessary to reveal individual atoms by imaging with ions, accommodated to the object at a low temperature. The ions are created at the sample surface by ionization of an inert image gas (usually helium), present at a low pressure (< 1 mTorr). at fields on the order of 4V/Å.

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