Fig. 5From: Progress in cancer drug delivery based on AS1411 oriented nanomaterialsA Formation mechanism scheme of MCM-41 mesoporous silicon. B Structure arrangement of M41S: (a) MCM-41 nanoparticles: hexagonal phase, (b) MCM-48 nanoparticles: cubic phase, (c) MCM-50 nanoparticles: layered phaseBack to article page