Biomedical Engineering Reference
In-Depth Information
range investigated, the sorption capability of the fullerene sample
increases noticeably with temperature decreasing. These data have
been used in the following sections to determine the characteristic
values of adsorption heat. Although the sorption capability of
activated carbon is higher than that of fullerenes, oxygen desorbed
from activated carbon samples is mainly in the ground triplet state.
Figure 4.3
Amounts of oxygen sorbed by fullerene (1), activated carbon
(2), and astralene (3) at 293 K depending on (a) oxygen pre-
ssure and (b) sorption duration (oxygen pressure 200 torr).
At the same time, the photo-desorption from fullerene and
astralene samples can be used to obtain excited singlet oxygen, that
is extremely important for many applications in biology, medicine,
and laser technology. Thus, the possibility of increasing the oxygen
sorption capability by fullerenes and astralenes samples is a very
important task.
Figure 4.4
Oxygen adsorption isotherms on fullerene at adsorbent
temperatures of (1) 293, (2) 273, (3) 265, and (4) 205 K.
