M. FURUYA ET AL.
Copyright © 2013 SciRes. ACES
9
Figure 4. The X-ray photoelectron spectra of Ar2p for car-
bon blacks.
was observed as 42.6 ± 0.1 eV, and the splitting width of
the spin-orbit interaction was 3.0 eV. By the comparison
with the Ar+-sputtered graphite, the difference between
C1s and Ar2p3/2 became to be lower and the splitting
width of the spin-orbit interaction increased for the car-
bon blacks. These results indicate that the ad-/ab-sorption
states observed at around 90 - 100 K and 350 K are due
to the weak and strong chemical interactions.
4. Conclusions
Carbons show the noble interaction with Ar due to the
characteristic structures and those electronic states. The
X-ray photoelectron spectroscopy results in the chemical
interaction between Ar and carbons such as C60, CNTs,
and carbon blacks. Carbons have possibilities of the di-
versity of chemical interactions with designs of structure
and those electronic states.
5. Acknowledgements
Authors thank Tokai Carbon Co. for the sample supply
of the carbon blacks. Authors also acknowledge Profes-
sor M. Koinuma of Kumamoto University for the support
of XPS measurements for the Ar+-sputtered carbon
blacks.
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