Nanoconfined ionic liquids under electric fields
Nanoconfined ionic liquids under electric fields
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电场作用下的纳米离子液体
DOI：
10.1063/1.3292213
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发表时间：
2010-01-25
影响因子：
4
通讯作者：
Liu, Shuhai
中科院分区：
文献类型：
--
作者：
Xie, Guoxin;Luo, Jianbin;Liu, Shuhai
采用薄膜干涉法测量了离子液体薄膜的厚度，并计算了有效粘度，研究了外加电场对离子液体薄膜的影响。实验结果表明，当EEFs的作用强度小于阳离子头部基团与阴离子之间的电相互作用时，可显著增加离子液体的膜厚。EEFs对侧链较短的离子液体膜的影响更为显著。据认为，带电的阴离子和阳离子的头基在带电壁附近结构化以形成有序层，并且由于诱导偶极子，界面处的短烷基侧链沿着EEF方向排列。
The effect of external electric fields (EEFs) on ionic liquid films confined within a nanogap has been investigated by measuring the film thickness with the thin film interferometry and calculating the effective viscosity. Experimental results indicated that the film thickness of ionic liquids could be increased obviously by the application of EEFs with strengths weaker than the electric interactions between cationic head groups and anions. The effect of EEFs on the confined ionic liquid film with a shorter alkyl side chain is more noticeable. It is thought that the charged anions and headgroups of the cations are structured near electrified walls to form ordered layers and short alkyl side chains at the interfaces are aligned along the EEF direction due to induced dipoles.