接触带电
材料科学
离子
电子转移
吸附
电子
聚四氟乙烯
化学物理
化学工程
纳米技术
分析化学(期刊)
复合材料
物理化学
有机化学
化学
摩擦电效应
工程类
物理
量子力学
作者
Jinhui Nie,Zewei Ren,Liang Xu,Shiquan Lin,Fei Zhan,Xiangyu Chen,Zhong Lin Wang
标识
DOI:10.1002/adma.201905696
摘要
Abstract As a well‐known phenomenon, contact electrification (CE) has been studied for decades. Although recent studies have proven that CE between two solids is primarily due to electron transfer, the mechanism for CE between liquid and solid remains controversial. The CE process between different liquids and polytetrafluoroethylene (PTFE) film is systematically studied to clarify the electrification mechanism of the solid–liquid interface. The CE between deionized water and PTFE can produce a surface charges density in the scale of 1 nC cm −2 , which is ten times higher than the calculation based on the pure ion‐transfer model. Hence, electron transfer is likely the dominating effect for this liquid–solid electrification process. Meanwhile, as ion concentration increases, the ion adsorption on the PTFE hinders electron transfer and results in the suppression of the transferred charge amount. Furthermore, there is an obvious charge transfer between oil and PTFE, which further confirms the presence of electron transfer between liquid and solid, simply because there are no ions in oil droplets. It is demonstrated that electron transfer plays the dominant role during CE between liquids and solids, which directly impacts the traditional understanding of the formation of an electric double layer (EDL) at a liquid–solid interface in physical chemistry.
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