CeO2 Nanoparticles for the Protection of Photosynthetic Organisms Immobilized in Silica Gels
journal contributionposted on 2011-03-22, 00:00 authored by Clémence Sicard, Mercedes Perullini, Cecilia Spedalieri, Thibaud Coradin, Roberta Brayner, Jacques Livage, Matías Jobbágy, Sara A. Bilmes
Synthetic cytocompatible CeO2 nanoparticles embedded in transparent silica hydrogels are useful for creating inorganic supports favoring the long-term entrapment of living Chlorella vulgaris cells. The key protective role of nanoparticles is twofold: (1) They efficiently absorb harmful UV radiation without scattering the useful visible one. (2) They limit oxidative stress damage, such as that induced by H2O2, thanks to the surface redox Ce3+−Ce4+ reactivity of nanoparticles.