Sorption Properties of Mesoporous Multilayer Thin Films

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• 作者：Marí ; a Cecilia Fuertes ; Silvia Colodrero ; Gabriel Lozano ; Agustí ; n R. Gonzá ; lez-Elipe ; David Grosso ; C&eacute ; dric Boissiè ; re ; Cl&eacute ; ment Sá ; nchez ; Galo J. de A. A. S
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：March 6, 2008
• 年：2008
• 卷：112
• 期：9
• 页码：3157 - 3163
• 全文大小：458K
• 年卷期：v.112,no.9(March 6, 2008)
• ISSN：1932-7455

文摘

The vapor sorption properties of multilayers made of ordered mesoporous thin films with tailored compositionand mesostructure are herein investigated. Optical reflectance measurements versus partial pressure of severalvapors are performed to analyze the interplay between the affinity to and the accessibility of the differenttypes of layers in the structure. We find that the behavior of a mesoporous oxide layer within the multilayerlargely differs from that of the isolated thin film, its sorption properties being determined by the interactionwith neighboring films. An explanation of the phenomena observed in these complex systems is provided interms of the pore size, the affinity of each type of layer to specific compounds, and the effect of neighboringlayers in the sorption properties of bilayers by an independent environmental ellipsometric study.