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Yan, Yongan; Bein, Thomas; Brown, Kelly D.; Forrister, Ray and Brinker, Jeffrey (1992): Molecular recognition on acoustic wave devices. Modified zeolitee-silica thin films with tailored adsorption properties. In: Materials Research Society Symposium Proceedings, Vol. 271: pp. 435-441 [PDF, 1MB]

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Microporous thin films composed either of zeolite crystals embedded in sol-gel derived glass or of a molecular coupling layer, zeolite crystals and a porous silica overlayer, were formed on the gold electrodes of Quartz Crystal Microbalances (QCM). The microporosity of the thin films was characterized by in situ nitrogen and vapor sorption isotherms. Both preparation methods result in thin films with substantial microporosity. Selective adsorption based on molecular size exclusion from the microporous films could be achieved.

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