1 research outputs found
Graphene Oxide-Mediated Protection from Photodamage
This
Letter presents the unique properties of graphene oxide (GO)
as a multitask material protecting from UVB-induced photodamage. Three
mechanisms of GO action on fibroblast in vitro cultures are verified
here: physical - a barrier blocking UV radiation; chemical - antioxidative
activity; and biological - activation of cellular antioxidative defense.
The changes in GO physicochemical properties appearing due to UVB
exposure underpin the observed UV protection phenomena. The results
reveal the simultaneous occurrence of two opposed processes, i.e.,
under small doses of UVB, the tested material undergoes oxidation
and sp<sup>2</sup> network rebuilding. In the vicinity of the GO surface,
the locally triggered high temperature is responsible for a reduction
process, while strong oxidative agents such as OH radicals cause parallel
GO oxidation. This phenomenon is enabled thanks to the exceptional
properties of carbonaceous materials. As a consequence, GO turns out
to be a multitask UV protector increasing fibroblast survival