Substrates do influence the ordering of mesoporous thin films
Substrates do influence the ordering of mesoporous thin films
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基材确实影响介孔薄膜的有序性
DOI：
10.1039/b501578b
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
M. Klotz
中科院分区：
文献类型：
--
作者：
A. Chougnet;C. Heitz;E. Søndergård;J. Berquier;P. Albouy;M. Klotz
分别以十六烷基三甲基溴化铵（CTAB）和Pluronic嵌段共聚物为模板剂，合成了两种有序结构的胶束，即圆柱形六方胶束和紧凑型六方胶束。对沉积在玻璃、Si 3 N4、SiTiOx和具有天然氧化物（Ti）的金属上的薄膜的排序进行了比较。我们观察到薄膜的有序织构受衬底的影响很大。为了区分表面粗糙度和表面力的影响，玻璃基板系统地改性接枝环氧乙烷/环氧丙烷（EO/PO）统计共聚物。改变EO含量允许微调表面的亲水性。在这种情况下，观察到与裸玻璃相同的有序相和质量，但有序结构的系统性更高收缩。这归因于接枝的基质和模板分子之间相似的化学性质，这加速了有序结构的形成。
Two kinds of ordered structures, a cylindrical hexagonal and a compact hexagonal arrangement of micelles, were synthesized using either CTAB or a Pluronic block copolymer as templating agents. The ordering of thin films deposited on glass, dielectrics (Si3N4, SiTiOx) and a metal with a native oxide (Ti) were compared. We observed that the ordered texture of the films was greatly influenced by the substrate. In order to differentiate the effects of surface roughness and surface forces, glass substrates were systematically modified by grafting ethylene oxide/propylene oxide (EO/PO) statistical copolymers. Varying the EO content allowed fine tuning of the hydrophilicity of the surface. In this case, the same phase and quality of ordering as on bare glass is observed but with a systematic higher contraction of the ordered structure. This is ascribed to the similar chemical nature between the grafted substrate and the templating molecules, which fasten the formation of the ordered structure.