Kinetically controlled formation of helical mesoporous silica nanostructures correlated to a ribbon intermediate phase

摘要: We report here the synthesis of mesoporous silica nanostructures simultaneously having helical morphology and c2mm symmetry correlated to a ribbon intermediate phase. A mixture four types nanostructures, including short-pitch (just few lattice constants) sphere-like nanoparticles, straight nanorods, long-pitch (hundreds nanometres) twisted nanorods spiral could be produced. formation mechanism was proposed based on in situsmall-angle X-ray scattering (SAXS) measurements other analyses, with emphasis influences assembly kinetics structural morphological properties nanostructures. Based mechanism, we further showed simple kinetic control prepare solely or The present study demonstrates possibility tailor mesostructures through offers prospects for design preparation these materials.