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Antioxidant activity of nanomaterials
- Valgimigli, Luca, Baschieri, Andrea, Amorati, Riccardo
- Journal of materials chemistry 2018 v.6 no.14 pp. 2036-2051
- antioxidant activity, antioxidants, ceric oxide, gold, lignin, mechanism of action, melanin, molecular weight, nanogold, nanoparticles, platinum, trapping
- Nanomaterials represent one of the most promising frontiers in the research for improved antioxidants. Some nanomaterials, including organic (i.e. melanin, lignin) metal oxides (i.e. cerium oxide) or metal (i.e. gold, platinum) based nanoparticles, exhibit intrinsic redox activity that is often associated with radical trapping and/or with superoxide dismutase-like and catalase-like activities. Redox inactive nanomaterials can be transformed into antioxidants by grafting low molecular weight antioxidants on them. Herein, we propose a classification of nanoantioxidants based on their mechanism of action, and we review the chemical methods used to measure antioxidant activity by providing a rationale of the chemistry behind them.