Additional mechanical factors in the outer layer of our cells play a large role in the formation and the morphogenetic process of our bodies and tissues. The concave-convex surface structure of wrinkles in the brain and that of folds in the intestines are both determined by the mechanical balance between the surface and cytoskeleton. In our study, these morphogenetic processes will be mimicked and the surface buckling phenomenon will be used to create a variety of minute wrinkle structures on the surface of silicon rubber. Moreover, we adopted wrinkle to prepare various application fields, such as colloidal array, SERS sensing film and superhydrophobic surface.
Anchoring of [Pt(tpy)Cl]Cl complex to the (3-aminopropyl)trimethoxysilane-modified mesoporous silica (MCM-48) successfully gives a new type of photocatalyst with unique photoluminescence property at room temperature. At low Pt loadings, Pt (II) complex exists in an isolated state without mutual interaction, which exhibits strong photoluminescence emission due to the 3LC and/or 3MLCT transitions maximized near 530 nm. Contrastingly, such emissions significantly decrease at high Pt loadings accompanied with a new emission at around 620 nm due to the 3MMLCT transition originating from short Pt···Pt interactions. The photocatalytic activities in the hydrogen production under aqueous conditions correspond well with the increasing intensity of 3MMLCT emission. It can be suggested that the anchored Pt (II) complexes, which are closely related to each other, behave as single-component bifunctional catalyst enabling both visible-light sensitization and H2-evolution without the need for an additional electron relay.
Carboxylated SiO2-coated α-Fe nanoparticles have been successfully prepared via CaH2-mediated reduction of SiO2-coated Fe3O4 nanoparticles followed by surface carboxylation. These α-Fe-based nanoparticles, which are featured by ease of coating with additional functional groups, large magnetization of 154 emu/g-Fe, enhanced corrosion resistivity, excellent aqueous dispersibility, and low cytotoxicity, have a potential to be a versatile platform in biomedical applications.