Linkage-Nondestructive Surface Migration of Zeolite Microcrystals During Monolayer Assembly on Glass Through Ionic Linkages
Monolayers of zeolite microcrystals were prepared on glass plates with three different types of linkage between zeolite crystals and the substrate, namely, (a) covalent, (b) ionic, and (c) poly electrolyte-mediated ionic linkages using sonication with stacking (SS) as the method. The required periods for the coverage to reach 100% were 2, 3, and 7 min, respectively, upon changing the linkage from (a) to (b) and to (c), respectively, indicating that the surface migration becomes slower as the binding strength increases. The coverage, binding strength, and degree of close packing gradually decreased with reaction time with (a) as the linkage while those with (b) and (c) as the linkages remain essentially unaltered. The results indicate that the surface migration of crystals undergo linkage-destructively when crystals were attached to the substrates through covalent linkages and linkage-nondestructively when crystals were attached to the substrates through ionic linkages.
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Document Type: Research Article
Publication date: January 1, 2010
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