This contribution reports on the synthesis and the main physical properties of CeO2 nanoparticles (which
can be as small as 〈fCeO2〉 ~ 3.9 nm in diameter) engineered for the first time by a completely green
process using Hibiscus Sabdariffa natural extract as an effective chelating agent. Their morphological,
structural and optical properties were investigated using various complementary surface/interface
characterization techniques.