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| - Growth of Oriented Molecular Sieve Thin Films from Aligned SeedLayers
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| - Oriented molecular sieve thin film grown onto a glass surface seeded with aligned crystals. The novel seed layer was formed by aligning rod-shaped seed crystals under an electric field.
- Oriented aluminum phosphate five (AlPO4-5) molecular sieve thin films were grown onto glass surfacesseeded with aligned AlPO4-5 crystals. The novel aligned seed layer was formed by depositing rod-shaped seed crystals from a colloidal suspension under an electric field. Alignment of the seed layerpromotes adhesion of the seed crystals to the underlying substrate and enhances surface nucleation andgrowth to allow secondary crystallization of oriented thin films. There was no correlation between thecrystal orientation of the seed layer and the orientation of the secondary crystals grown in the thin film.The orientation of the secondary crystals could be varied from parallel to perpendicular to the underlyingseed layer depending on the synthesis conditions. The technique presented here offers a novel methodfor growing oriented molecular sieve membranes that are useful for separations and catalysis.
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