Electron state of sodium atoms adsorbed on tungsten and effect of electric field on adsorption energy

Klimenko, E.V.; Наумовец, А.Г.

doi:10.1016/0039-6028(69)90050-8

Cited by 25 publications

(5 citation statements)

References 12 publications

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“…The studies of the case of metal substrate [9][10][11][12][13] have shown that at increasing concentration of adsorbate on the surface the reverse of field action can take place. One can expect similar effect for the semiconductor surface*.…”

Section: Discussionmentioning

confidence: 99%

“…The twofold interpretation of reverse of the fleld effect has been given: the transition of the electric double layer power through the maximum (the derivative d(p x Na)/dNa influences the value peff and even can 1ead to the change of sign of peff [10]) or inverse of dipole moment's vector orientation when the second layer is filled [9]. We have a rare opportunity to avoid ambiguous interpretation, because the absence of minimum on the work function curves (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The studies of the external electric field influence on the behaviour of the adsorbed particles on the metal surface have shown that such factor can be helpful to understand the adsorption phenomena [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…However, the "invisibility" of the alkalis within FIM, caused by the unfortunate relationship of the image and desorbing fields restricts these studies by the influence of the non uniform external field on the eqilibrium distribution of the adsorbate on the tip [9][10][11] and field stimulated surface diffusion (FSSD) [12][13].…”

Section: Introductionmentioning

confidence: 99%

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Field Stimulated Surface Diffusion of Lithium on Germanium (100) and (111) Planes

Suchorski¹

1992

Acta Phys. Pol. A

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Field stimulated surface ditfusion of lithium on atomically clean (100) and (111) germanium single crystal planes has been investigated by means of field emission metlod. Sealed-off field emission tube with a channel multiplier was used. The surface density of lithium adatoms on the germanium surface was determined applying a standard tungsten (112) crystal plane. Tle dependences of the surface diffusion activation energy on the appłied electric field at ditferent lithinm coverages lave been obtained. The initial dipole moment of Li adatoms on the Ge (100) and (111) planes was then determined. The values 1.3 ± 0.2 and 1.0 ± 0.2 debye obtained for the Li-Ge (100) and Li-Ge (111) systems respectively are in good agreement with the ones calculated from the work function measurements. The reverse effect of the field influence on the surface diffusion of lithium on Ge (100) and (111) płanes has been observed as the second lithium layer is filling. Relative contributions of the peculiarities of semiconductor substrate and alkali adsorbate on the properties of adsystems are discussed on the basis of experimental results.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Field Stimulated Surface Diffusion of Lithium on Germanium (100) and (111) Planes

Suchorski¹

1992

Acta Phys. Pol. A

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“…Unanimity over the numerical factor in the right hand member of this equation is lacking [63, 641, the basic problem being to identify the nature of the adsorption process [65]. Since the adsorption is partially ionic, it might be argued that the numerical factor should be larger than 2, and may be nearer 3 at low coverage [58]. Such considerations would make the value of the dipole moment smaller, but the evaluation of the proportion of an electron which is transferred from an adsorbed sodium atom to the copper or the iron film should not be affected if the correct length is ascribed to the dipole.…”

Section: Stability Of Sodium Overlaysmentioning

confidence: 99%

Physical Adsorption and Surface Potential Measurements on Evaporated Metal Films Bearing Sodium Deposits

Klemperer

Snaith

1971

Ber Bunsenges Phys Chem

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The interaction of sodium with steel surfaces is of interest in reactor technology. We have therefore developed methods of measuring sub‐monolayer concentrations of sodium deposited on evaporated metal films and used these methods to examine the stability of sodium overlays. Surface sodium is estimated by: Continuous recording of the surface potential due to sodium using the diode method Observing the fall in surface potential due to physically adsorbed xenon Observing the fall in monolayer value for physically adsorbed xenon which occurs at the same time, and Extracting heat data from the adsorption isotherms. Sodium overlays on copper and on iron show no tendency to mix over the temperature range studied (77 K to 423 K) but sodium appears to overrun the internal structure of films at an appreciable rate above 273 K.

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Nucleation and Epitaxy

Chernov

1984

Springer Series in Solid-State Sciences

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Electron state of sodium atoms adsorbed on tungsten and effect of electric field on adsorption energy

Cited by 25 publications

References 12 publications

Field Stimulated Surface Diffusion of Lithium on Germanium (100) and (111) Planes

Field Stimulated Surface Diffusion of Lithium on Germanium (100) and (111) Planes

Physical Adsorption and Surface Potential Measurements on Evaporated Metal Films Bearing Sodium Deposits

Nucleation and Epitaxy

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