高度订购的"无缺陷"自组装混合片,具有四边形半层结构
Paolo Falcaro1, Stefano Costacurta, Giovanni Mattei
1Dipartimento di Ingegneria Meccanica, Settore Materiali, Università di Padova, Via Marzolo 9, 35131 Padova, Italy.
Journal of the American Chemical Society
|March 18, 2005
概括
研究人员使用一方法创建了高度有序的,无缺陷的混合膜. 这些新型四角相位膜在各种化温度下表现出异常的结构稳定性,提供有前途的材料性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 固态化学 固态化学
背景情况:
- 自组装混合膜对于先进的材料应用至关重要.
- 在薄膜中实现高结构秩序和无缺陷的中相仍然是一个挑战.
研究的目的:
- 为了合成和表征新的,高度有序的混合电影,具有无缺陷的 mesophase.
- 研究这些薄膜的热稳定性和结构演变.
- 阐明形成动力学及其对 mesostructure 组织的影响.
主要方法:
- 甲基三甲西兰和四甲西兰的一共解.
- 浸泡涂层沉积技术. 沉浸涂层沉积技术.
- 使用扫描传输电子显微镜 (STEM),小角度X射线散射 (SAXS) 和富里埃变换红外光谱 (FTIR) 进行表征,包括现场同步子辐射FTIR.
主要成果:
- 在微米尺度上成功合成了具有"无缺陷"中相组织的混合膜.
- 鉴定了一种具有高热稳定的新型四角相位相 (空间组I4 / mmm).
- 证明在形成过程中较慢的二氧化物种动力学有助于高度的中层结构组织.
结论:
- 一合成方法可以创建高度有序的,无缺陷的混合膜,具有稳定的四边形半相.
- 观察到的结构顺序直接与薄膜形成期间的二氧化物种的控制动力学有关.
- 这些发现为设计具有量身定制的中孔架构的高级功能材料提供了一条途径.
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