Green synthesis of ultrasmall selenium nanoparticles (SeNPs) using Hericium erinaceus polysaccharide (HEP) as nanozymes for efficient intracellular antioxidation

[Display omitted] •Green synthesis of ultra-small selenium nanoparticles (SeNPs) has been achieved.•The SeNPs modified with H. erinaceus polysaccharide (HEP) have good dispersibility.•The as-prepared HEP-SeNPs can work as antioxidant nanozymes like CAT, SOD and GPx.•The as-prepared HEP-SeNPs show ex...

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