Orientation specific deposition of mesoporous particles

Orientation specific deposition of mesoporous particles

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We present a protocol for a facile orientation specific deposition of plate-like mesoporous SBA-15 silica particles onto a surface (mesopores oriented normal to surface).A drop of an aqueous dispersion of particles is placed on the surface and water vaporizes under controlled Sunglasses - Accessories relative humidity.Three requirements are essential for uniform coverage: particle dispersion should not contain aggregates, a weak attraction between particles and surface is needed, and evaporation rate should be low.Aggregates are removed by stirring/sonication.Weak attraction is realized by introducing cationic groups to Mains Terminal Strip the surface.

Insight into the mechanisms of the so-called coffee stain effect is also provided.