Autor: Biernat, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Self-Diffusion of Tungsten on Some Facets of Tungsten Microcrystal
Autorzy:: Biernat, T.
Błaszczyszyn, R.
Powiązania:: https://bibliotekanauki.pl/articles/1811508.pdf
Data publikacji:: 2008-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 79.70.+q
68.90.+g
05.40.-a
Opis:: The field emission current fluctuation method was applied to investigate surface self-diffusion of tungsten on the (311) and (711) regions (along the zone line (211)-(100)) of a tungsten microcrystal (in the form of the field emitter tip of radius about 300 nm) in the temperature range 500-850 K. The surface diffusion parameters were obtained from spectral analysis of the current fluctuations. The results are discussed from the aspects of the substrate structure.
Źródło:: Acta Physica Polonica A; 2008, 114, S; S-11-S-16
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Diffusion of Potassium on the W(112) Plane Preadsorbed by Ni Atoms: Field Emission Current Fluctuations - Autocorrelation Study
Autorzy:: Biernat, T.
Błaszczyszyn, R.
Kleint, Ch.
Powiązania:: https://bibliotekanauki.pl/articles/2027391.pdf
Data publikacji:: 2001-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 79.70.+q
68.37.Vj
68.43.Jk
05.40.Ca
Opis:: Diffusion of potassium adsorbate on the W(112) plane with preadsorbed nickel was investigated by means of the autocorrelation function of field emission current fluctuations. A comparison of the experimental autocorrelation function with that of a theoretical calculation by Gesley and Swanson gives the surface diffusion coefficient of potassium. From its temperature dependence the diffusion activation energy at several Ni pre-coverages for a constant potassium coverage (Θ$\text{}_{K}$=0.4) is derived. The dependence of the activation energy for potassium surface diffusion on the nickel coverage - first reduction and then an increase with increasing Ni coverage - is observed. This is in agreement with the results obtained from the spectral analysis of the field emission current fluctuations of the same system. The decrease is understood to be a result of the smoothing effect caused by Ni atoms on the W(112) plane.
Źródło:: Acta Physica Polonica A; 2001, 99, 6; 665-672
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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