Checkerboard self-patterning of an ionic liquid film on mercury.
Checkerboard self-patterning of an ionic liquid film on mercury.
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汞上离子液体膜的棋盘自图案化。
DOI：
10.1103/physrevlett.106.197801
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发表时间：
2011
影响因子：
8.6
通讯作者：
M. Deutsch
中科院分区：
文献类型：
--
作者：
L. Tamam;B. Ocko;H. Reichert;M. Deutsch
室温离子液体 (RTIL) 界面的 Å 分辨率研究很少，尽管它们对于 RTIL 的科学和许多应用的重要性早已得到认可。我们对汞上 RTIL 的 Langmuir 胶片进行了 Å 分辨率的 X 射线研究。在低（高）覆盖率 [90 (50) Å2/分子] 下，发现了表面平行分子的单（双层）层。分子以横向离子棋盘图案自组装，与该 RTIL 在其块体固体界面处的均匀电荷、交替离子层不同。发现了二维近晶有序，分子堆积在平行条纹中，形成垂直于条纹的长程有序，但不沿着条纹。
Å-resolution studies of room temperature ionic liquid (RTIL) interfaces are scarce, in spite of their long-recognized importance for the science and many applications of RTILs. We present an Å-resolution x-ray study of a Langmuir film of an RTIL on mercury. At low (high) coverage [90 (50) Å2/molecule] a mono-(bi)layer of surface-parallel molecules is found. The molecules self-assemble in a lateral ionic checkerboard pattern, unlike the uniform-charge, alternate-ion layers of this RTIL at its bulk-solid interface. A 2D-smectic order is found, with molecules packed in parallel stripes, forming long-range order normal to, but none along, the stripes.