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- 2018
Au(111)/咪唑基离子液体界面结构研究：阳离子侧链长度的影响
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Abstract:
摘要 本文结合电化学方法与原子力显微镜力曲线技术，研究了两种烷基侧链长度不同的离子液体BMITFSA和OMITFSA在Au(111)电极表面附近的层状结构的数目和耐受力对电位的依赖性，探究了烷基侧链长度变化对界面层状结构的影响. 研究表明，不同烷基侧链长度的离子液体体系力-电位曲线形状基本相似. 在零电荷电位（the potential of zero charge，PZC）附近时，力值最小，因为此时电极表面荷电量较小，层状结构不稳定；电位偏离PZC的过程中，第一层层状结构力值呈现先增大后减小的趋势. 受到烷基侧链所处的不同位置影响，在PZC电位以负，短侧链离子液体的层状结构稳定性较好，而PZC电位以正，长侧链离子液体的稳定性较好
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