External electric field dependence of the structure of the electric double layer at an ionic liquid/Au interface
External electric field dependence of the structure of the electric double layer at an ionic liquid/Au interface
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DOI：
10.1063/1.4742920
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发表时间：
2012-08
影响因子：
4
通讯作者：
R. Yamamoto;H. Morisaki;O. Sakata;H. Shimotani;Hongtao Yuan;Y. Iwasa;T. Kimura;Y. Wakabayashi
中科院分区：
文献类型：
--
作者：
R. Yamamoto;H. Morisaki;O. Sakata;H. Shimotani;Hongtao Yuan;Y. Iwasa;T. Kimura;Y. Wakabayashi
为了阐明其在外电压下的双电层（EDL）结构，通过X射线反射计研究了离子液体N,N-二乙基-N-甲基-N-（2-甲氧基乙基）双（三氟甲磺酰基）亚胺铵与Au（111）表面之间的界面。观察到反射率随施加电压的变化而发生明显变化。使用液体结构模型计算界面周围离子液体的电子密度分布。外部电场的切换反转了 EDL 的极性，施加电压的大小控制了层状结构的大小以及分子位置波动。
In order to clarify its electric double layer (EDL) structure under external voltage, an interface between the ionic liquid N,N-diethyl-N-methyl-N-(2-methoxyethyl)ammonium bis(trifluoromethanesulfonyl)imide and a Au (111) surface was studied by x-ray reflectometry. A clear change in reflectivity was observed as a function of applied voltage. The electron density profile of the ionic liquid around the interface was calculated using liquid structure models. Switching of the external electric field reversed the polarity of the EDL, and the magnitude of the applied voltage controlled the magnitude of the layering structure as well as molecular position fluctuation.