Engineered Particle Surfaces

Preparation of Mesoscale Hollow Spheres of TiO2 and SnO2 by Templating Against Crystalline Arrays of Polystyrene Beads

“…We note that the interfacial properties of a polymer bead can be changed over a broad range by a variety of approaches (e.g., direct surface treatment and formation of self-assembled monolayers) to accommodate sol±gel systems with different surface tensions. [13] Fourth, the gelation process has to be fast enough that a network of gel will be formed around the template particle before the solvent evaporates completely. Otherwise, the attractive interactions (e.g., capillary forces) associated with solvent evaporation may cause the polymer beads to collapse into the closely packed form, and in this case, a three-dimensional porous structure of the ceramic material will be formed.…”

PVP‐Mediated Crystallization of Perovskite Phase in the PMN–PT Thin Films Prepared by Sol–Gel Processing

“…Under a large magnification shown in Fig. 2(b), it is found that the particles have a core‐shell like structure 25 although the shell layers did not completely enclose the cores. Such core‐shell like structures were not observed in the non‐PVP solutions.…”

Interface Investigation in Nanostructured BaTiO3/Silica Composite Ceramics

“…T he coating of oxide or metallic particles by a continuous silica shell (core–shell architecture) has led to significant advances in functional materials, thus increasing drastically the range of applications (photonic crystals, luminescent semiconductors, biomedical magnetic systems, etc.) 1,2 . As high‐temperature processes are not required to obtain the macroscopic composite, the initial nanoscale design is preserved.…”