Fig. 2
Physicochemical characterization of PCM-MSN@LA. a TEM images of PCM-MSN@LA particles and the morphology of PCM-MSN@LA particles (scale bar = 20 nm). b TEM and SEM images of PCM-MSN@LA particles (TEM: scale bar = 0.5 μm; the left upper corner image: scale bar = 50 nm; SEM: scale bar = 1 μm). Variation of MSNs after each modification in c size and d zeta. e The specific surface area of different samples analyzed by N2 adsorption–desorption method. f, g Variation of particles in size and zeta of PCM-MSN@LA in deionized water from 0 to 28 days measured using DLS