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Characterization of Se nanoparticles. TEM imaging (A) shows a near-spherical shape of the nanoparticles with major sizes about 30–70 nm. High-resolution TEM (B) shows the stabilizing PVA layer (b) adsorbed on the core Se (a) which appears to be crystalline [c] showing the direction of crystal planes). (C) XPS analysis showing Se 3d peaks at 55.4 and 56.2, suggesting its zero oxidation state.
