摩擦电效应
接触带电
纳米发生器
Kapton
电介质
材料科学
制作
极性(国际关系)
X射线光电子能谱
纳米技术
化学工程
复合材料
化学
光电子学
聚酰亚胺
医学
生物化学
替代医学
工程类
图层(电子)
病理
压电
细胞
作者
Jian Chen,Wei Tang,Cunxin Lu,Liang Xu,Zhiwei Yang,Baodong Chen,Tao Jiang,Zhong Lin Wang
摘要
Triboelectric nanogenerators attract more and more research attention, for their high efficiency, low fabrication cost, and high flexibility. However, the mechanism about triboelectrification remains highly debated. In this work, we constructed a liquid-metal based triboelectric nanogenerator (LM-TENG) and investigated the influence of the gas atmosphere on the triboelectrification between the liquid metal and the dielectric materials, such as PTFE, Kapton, and Nylon. It was found that the dielectric materials were negatively charged on contact with the liquid metal in ambient air. But in the nitrogen conditions, the polarity of the charges was reversed. Oxygen was excluded, which is responsible for the polarity reversal in contact electrification. Based on X-ray photoelectron spectroscopy, energy-dispersive X-ray, and SKFM data, a possible mechanism was proposed.
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