The corresponding organic contents were calculated from the mass losses until 500 °C. Mass losses higher than 500 °C are mainly attributed to reduction of the inorganic component. For assigning the organic content on each hierarchical level (i.e. oleic acid and epoxy phase), first the organic content on the first hierarchical level was obtained by analyzing the neat supraparticles without epoxy resin and subsequently the total organic content of the composite was subtracted by the content on the first HL to obtain the epoxy content.