Molecular ordering of mixed surfactants in mesoporous silicas: A solid-state NMR study

► Molecular ordering of mixed surfactants (CTAB+CPB) in mesoporous silica nanoparticles (MSNs) is described. ► CTAB and CPB co-exist in the pores without forming significant monocomponent domains. ► The study helps 'tailoring' the morphologies of MSNs.