Cubic Mesoporous Silica with Large Controllable Entrance Sizes and Advanced Adsorption Properties

Abstract

Large cavities (≈10–12.3 nm) of cubic (Fm‐3m) mesoporous silica without intergrowth are synthesized in the presence of block copolymer templates. The entrance sizes of these cavities can be adjusted in the range of ≈4–9 nm as confirmed by nitrogen sorption studies and an examination of the negative gold replicas. The 3D open mesostructures facilitate the transportation of biomolecules (see picture), as well as the replication of a large‐pore (9 nm) cubic mesoporous carbon.

Poly-l-lysine Functionalized Large Pore Cubic Mesostructured Silica Nanoparticles as Biocompatible Carriers for Gene Delivery

“…It is believed that the usage of low temperature enhances the penetration of the swelling agent TMB (1,3,5-trimethylbenzene) into the hydrophobic core of the micelles during synthesis, which ultimately results in an extra enlargement of pore size (27.9 nm). 15,29,31 The use of high hydrothermal treatment temperature of 140°C contributed in the widening of the entrance pore size above 13.4 nm. Owing to the small spherical particle size and the large pore size (large unit cell), the mesostructure symmetry of the sample is difficult to determine by powder X-ray analysis (XRD).…”

Synthesis and Characterization of Mesoporous SiO₂–CaO–P₂O₅ Bioactive Glass by Sol–Gel Process

“…TEM analysis also shows that mesoporous bioactive glass possess a one-dimensional channel structure with a pore size of 5 nm. The ordering of mesoporous channel structures may greatly influence hydroxyapatite forming ability, the protein adsorption and nutrient-delivery behavior for better in vivo bioactivity, 29) together with presenting the option of filling the pores with drugs or biological molecules.…”

Tunable Assembly of Organosilica Hollow Nanospheres

“…In order to optimize the dispersion degree and particle size of the benzene-silica hollow nanosphere, KCl was added in the initial mixture because the inorganic salts were always used to adjust the structure and morphology of the mesoporous materials in combination with nonionic copolymer surfactant. 24, 25 The TEM NBSB-423-105 was synthesized using 1,4-bis(trimethoxysilylethyl)benzene (BTSEB) as the silane precursor. To our delight, hollow nanospheres could still be observed in the TEM image of NBSB-423-105, though the contrast between the core and shell is not as clear as that of NES and NBS samples.…”