| Autor: |
MIHAMA, Kazuhiro, TANAKA, Nobuo |
| Zdroj: |
Journal of Electron Microscopy; Apr1976, Vol. 25 Issue 2, p65-74, 10p |
| Abstrakt: |
Ceramic beryllium oxide is evaporated by an electron beam in ultra high vacuum of about 10 Torr. The beryllium oxide films deposited on sodium chloride can be treated similarly to the amorphous carbon films. They are crystalline and for this reason the noise characteristic of the amorphous structure can be eliminated. Quantitative measurement with a micro-densitometer shows that the noise of the films of about 50 Å thick is lower than one half of that of carbon films of about 30 Å thick. Gold particles of diameter 5 Å-10 Å, which are scarcely observed with carbon films, can be clearly observed with the beryllium oxide films. An internal structure consisting of a few dots can be detected in the image of such particles. It is interpreted in terms of a selective imaging of the potential distribution of the particles. Images showing dots with square or triangular arrangement are also obtained. Each of dots corresponds possibly to the image of a single gold atom. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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