Preservation of the morphology of a self-encapsulated thin titania film in a functional multilayer stack: an X-ray scattering study.
Preservation of the morphology of a self-encapsulated thin titania film in a functional multilayer stack: an X-ray scattering study.
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DOI：
10.1002/cphc.200800800
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发表时间：
2009-03
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影响因子：
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通讯作者：
J. Perlich;M. Memesa;A. Diethert;E. Metwalli;Weinan Wang;S. Roth;A. Timmann;J. Gutmann;P. Müller‐Buschbaum
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文献类型：
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作者：
J. Perlich;M. Memesa;A. Diethert;E. Metwalli;Weinan Wang;S. Roth;A. Timmann;J. Gutmann;P. Müller‐Buschbaum
二氧化钛形态的定制通过三嵌段共聚物（充当结构导向剂）和溶胶-凝胶化学的组合来实现，所述溶胶-凝胶化学使得能够将所提供的无机材料（二氧化钛）掺入到三嵌段共聚物的选定相中。将溶液旋涂在FT 0涂覆的玻璃上，然后等离子体蚀刻和煅烧薄膜，导致形成自封装的结晶二氧化钛纳米结构。所制造的纳米结构被逐步涂覆有染料、导电聚合物和金，形成功能性多层堆叠。一个先进的小角度散射技术探测样品与X射线同步辐射掠入射（GISAXS）的制备路线的表征，散射允许访问内部的多层结构。定制的二氧化钛形态保持在制备过程中朝向光伏示范电池的功能性多层堆叠。两个明显可区分的结构源自基材和由三嵌段共聚物模板化的二氧化钛;因此其他层不诱导额外的结构。因此，该研究提供了证据，即通过在整个功能性多层叠层构建中由结构导向剂产生的自包封的二氧化钛形态的保留来证明用于定制形态的努力是合理的。
Tailoring of the titania morphology is achieved by the combination of a triblock copolymer, acting as structure-directing agent, and a sol-gel chemistry enabling the incorporation of the provided inorganic material (titania) into the selected phase of the triblock copolymer. Spin-coating of the solution on FTO-coated glass, followed by plasma etching and calcination of the thin film results in the formation of self-encapsulated crystalline titania nanostructures. The fabricated nanostructures are coated stepwise with dye, conductive polymers and gold forming a functional multilayer stack. An advanced small-angle scattering technique probing the sample with X-ray synchrotron radiation under grazing incidence (GISAXS) is employed for the characterization of the preparation route, as scattering allows accessing the structure inside the multilayers. The tailored titania morphology is preserved during the preparation route towards the functional multilayer stack of a photovoltaic demonstration cell. Two clearly distinguishable structures originate from the substrate and the titania templated by the triblock copolymer; hence the other layers induce no additional structures. Therefore, this investigation provides the evidence that the effort spent to tailor the morphology is justified by the preservation of the self-encapsulated titania morphology that is created by the structure-directing agent throughout the functional multilayer stack build-up.