| abstract |
The mesoporous silica particles each comprise a core particle comprising first mesopores, wherein a periphery of the core particle is covered with silica. Preferably, second mesopores, smaller than the first mesopores, are provided in the silica-covered part formed by the silica covering. The mesoporous silica particles are produced by: a surfactant complex silica particle preparation step of mixing a surfactant, water, an alkali, a hydrophobic part-containing additive and a silica source to thereby prepare surfactant complex silica particles, said hydrophobic part-containing additive including a hydrophobic part for increasing a volume of micelles to be formed by the surfactant; and a silica covering step of adding the silica source to the surfactant complex silica particles to thereby cover a periphery of each core particle with silica. |