Bi nanostructures obtained on Si substrates by thermal evaporation method

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Resumo

Bi low dimensional structures were obtained on the Si(100) substrates by thermal evaporation method in Ar. Bi nanocrystals and nanowires were condensed on the Si substrates at 10–20 s deposition time. Computer processing of SEM-images was used to determine the sizes of Bi nanocrystals and microcrystals and their distribution densities. The distribution density of nanocrystals was larger than its the microcrystals by a factor of 85–260. The increase of deposition time up to 20 s reduced the nanocrystal density by a factor of 2 with the increase of their sizes. X-ray diffraction analysis revealed oxide layers on the Bi nanocrystals and the Si substrates. The decrease in the sizes of the Bi nanocrystals and the increase in their density on the Si substrates in comparison with those on glassy carbon substrates were observed.

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Sobre autores

G. Kozhemyakin

Vladimir Dal Lugansk State University

Autor responsável pela correspondência
Email: genakozhemyakin@mail.ru
Rússia, Lugansk

S. Kiiko

Vladimir Dal Lugansk State University

Email: genakozhemyakin@mail.ru
Rússia, Lugansk

A. Kiiko

Vladimir Dal Lugansk State University

Email: genakozhemyakin@mail.ru
Rússia, Lugansk

V. Artemov

Shubnikov Institute of Crystallography of Kurchatov Complex of Crystallography and Photonics of NRC “Kurchatov Institute”

Email: genakozhemyakin@mail.ru
Rússia, Moscow

I. Volchkov

Shubnikov Institute of Crystallography of Kurchatov Complex of Crystallography and Photonics of NRC “Kurchatov Institute”

Email: genakozhemyakin@mail.ru
Rússia, Moscow

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2. Fig. 1. SEM image of Bi nano- and microcrystals on a Si(110) substrate with a deposition time of 15 s (a); a rhombohedral Bi nanocrystal (b).

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3. Fig. 2. Diffraction pattern of Bi nano- and microcrystals with a deposition time of 20 s.

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4. Fig. 3. Relative quantity (N) of Bi nano- and microcrystals at deposition time: a, b – 10, c, d – 15, d, e – 20 s.

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5. Fig. 4. Dependence of the relative amount (N) of Bi nanocrystals (a) and microcrystals (b) on the shape factor kф.

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