Water-Triggered Conduction Mediated by Proton Exchange in a Hygroscopic Fulleride and Its Hydrate
作者： Manesh Zachariah , Efstratia Mitsari , Michela Romanini , Panagiota Zygouri , Dimitrios Gournis
DOI: 10.1021/JP509072U
关键词:
摘要: Impedance spectroscopy is employed to probe the impact of water on dc conductivity and ac dielectric response polycrystalline C60(ONa)24 fulleride, both in its bulk-hydrate form, stable only below 370 K, pure obtained by heating high temperature. Exposure material ambient air results condensation vapor crystallites’ surface, which turn leads an enhancement room-temperature 4 orders magnitude due charge transport through hydration layer. Electrical conduction hydrate between 320 380 K dominated a nonequilibrium contribution associated with structural water, value that higher than almost two decades at 360 K. Both enhancements are most likely proton exchange mechanism. All impedance spectra exhibit, radiofrequency range, loss feature related accumulation free cha...
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