Universal scaling of charge transport in glass-forming ionic liquids.
Universal scaling of charge transport in glass-forming ionic liquids.
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玻璃形成离子液体中电荷传输的普遍缩放。
DOI：
10.1039/b816106b
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Friedrich Kremer
中科院分区：
文献类型：
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作者：
J. Sangoro;C. Iacob;A. Serghei;Christian Friedrich;Friedrich Kremer
用宽带介电光谱、差示扫描量热法和流变学研究了多种玻璃离子液体(ILS)的电荷输运和玻璃化动力学。虽然直流电导率和粘度的绝对值随温度和ILS的系统结构变化而变化超过11年，但电荷输运的特征频率与结构的α弛豫之间存在定量的一致性。这可以追溯到动态玻璃化转变辅助跳跃作为电荷传输的基本机制。
Charge transport and glassy dynamics of a variety of glass-forming ionic liquids (ILs) are investigated in a wide frequency and temperature range by means of broadband dielectric spectroscopy, differential scanning calorimetry and rheology. While the absolute values of dc conductivity and viscosity vary over more than 11 decades with temperature and upon systematic structural variation of the ILs, quantitative agreement is found between the characteristic frequency of charge transport and the structural alpha-relaxation. This is traced back to dynamic glass transition assisted hopping as the underlying mechanism of charge transport.