- Tytuł:
- Influence of Oxygen Impurities on Electrical Properties of Fullerene C$\text{}_{60}$
- Autorzy:
-
Rabenau, T.
Roth, S.
Kremer, R. K. - Powiązania:
- https://bibliotekanauki.pl/articles/1933397.pdf
- Data publikacji:
- 1995-04
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
72.20.Jv
72.80.Le
72.20.-i - Opis:
- We present high temperature dc, ac and contactless microwave conductivity results on solid-state C$\text{}_{60}$ (films and crystals) from room temperature up to 850 K. Heating pristine samples, which were exposed to the ambient atmosphere, under dynamic vacuum at first leads to a reduction of the electrical resistance and finally, above ≈700 K, to an increase in the resistance. The decrease is ascribed to oxygen desorption and the increase to the chemical reactivity of residual chemisorbed oxygen with the C$\text{}_{60}$ host molecules, respectively. Samples, annealed above 800 K, display a reversible temperature dependence of the resistance. The high temperature regime of their resistance exhibits an activated behaviour with an universal activation energy of 2E$\text{}_{a}$ = 1.85 ± 0.04 eV for crystals and films, which is identical to the HOMO-LUMO splitting of the C$\text{}_{60}$-molecules.
- Źródło:
-
Acta Physica Polonica A; 1995, 87, 4-5; 881-884
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł