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. 2020 Jul 12;187(8):441. doi: 10.1007/s00604-020-04415-3

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© The Author(s) 2020

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Fig. 1 — Chemical structure of highly defective graphene oxide. The reduction process leads to a restored sp²-hybridized carbon lattice with oxygen moieties at the edges of the flakes. The elimination of structural defects within the material is not feasible