3.6. Wearability
The performance of the photothermal membranes is evaluated on human skin
as shown in Fig. 7a, b, and Supplementary Video 2. The top is the
initial CS/MWCNTs concentration, the bottom left is 1/2 of the initial
concentration, the bottom right is 1/4 of the initial concentration, and
in the middle of the three is PLLA (which is difficult to distinguish
from the figure due to its very poor photothermal performance). It can
be seen that the high concentration of CS/MWCNTs/APLLA always maintains
the highest temperature, which slowly increases with time up to 46 ˚C
without discomfort to human skin. The photothermal membrane was pasted
on clothes and evaluated for its photothermal performance (Fig, 7c and
d). It can rise 7.6 ˚C in two minutes outdoors (865
Wm-2), which is significantly better than PLLA,
demonstrating its applicability to wearable photothermal devices. By
co-culturing with HSF for 12 and 24 hours, the photothermal membrane
also demonstrated excellent biocompatibility (Fig. 7e and f).