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Reduced graphene oxide (RGO) containing composite hydrogels, based on poly(N-isopropylacrylamide) (PNIPA) were prepared by two different methods: (i) by incorporating RGO directly into the polymer matrix; (ii) applying a post-synthesis reduction of the graphene-oxide (GO) already incorporated into the polymer. The samples were compared by various microscopic (small angle neutron scattering, differential...