Self-assembly structures of nonionic surfactants at graphite/solution interfaces
Self-assembly structures of nonionic surfactants at graphite/solution interfaces
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DOI：
10.1021/la9702547
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发表时间：
1997-08-06
期刊：
影响因子：
3.9
通讯作者：
Aksay, IA
中科院分区：
文献类型：
--
作者：
Patrick, HN;Warr, GG;Aksay, IA
用原子荧光显微镜研究了一系列聚氧乙烯十二烷基醚（C12 En）非离子表面活性剂在石墨表面的界面自组装结构，并以空间位阻稳定力为对比机制.聚集体以垂直于C12 E5-C12 E10的底层石墨对称轴的平行条带排列。这些被解释为hemicylindrance胶束，与以前的研究离子表面活性剂吸附在石墨上。C12 E23显示无特征层，C12 E3形成垂直于石墨表面生长的锚定层状相。我们与那些在本体溶液中形成的界面结构，并表明，最初吸附的分子模板的界面聚集体，修改它们的自组装行为。
The interfacial self-assembly structures of a series of poly(oxyethylene) n-dodecyl ether (C12En) nonionic surfactants on graphite has been imaged by atomic farce microscopy using only the steric stabilization force as the contrast mechanism. Aggregates are arranged in parallel stripes perpendicular to the underlying graphite symmetry axes for C12E5-C12E10. These are interpreted as hemicylindrical micelles, consistent with previous studies of ionic surfactants adsorbed on graphite. C12E23 shows a featureless layer and C12E3 forms an anchored lamellar phase growing normal to the graphite surface. We relate the interfacial structures to those formed in bulk solution and show that the initially adsorbed molecules template the interfacial aggregates, modifying their self-assembly behavior.