Li Ding, Xu Cheng, Liao Yanjun, Cai Wenzhe, Zhu Yongqiao, Wang Zhong Lin
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China.
Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China.
Sci Adv. 2021 Sep 24;7(39):eabj0349. doi: 10.1126/sciadv.abj0349.
Contact electrification (CE) (or triboelectrification) is the phenomena where charges are produced through physical contact between two materials. Here we report the atomic featured photon emission spectra during CE between two solid materials. Photon emission provides the evidence that electron transfer takes place at the interface from an atom in one material to another atom in the other material during CE. This process is the contact electrification induced interface photon emission spectroscopy (CEIIPES). It naturally paves a way to a spectroscopy corresponding to the CE at an interface, which might impact our understanding of the interaction between solids, liquids, and gases. The physics presented here could be expanded to Auger electron excitation, x-ray emission, and electron emission in CE for general cases, which remain to be explored. This could lead to a general field that may be termed as contact electrification induced interface spectroscopy (CEIIS).
接触起电（CE）（或摩擦起电）是指通过两种材料之间的物理接触产生电荷的现象。在此，我们报告了两种固体材料在接触起电过程中的原子特征光子发射光谱。光子发射提供了证据，表明在接触起电过程中，电子在界面处从一种材料中的一个原子转移到另一种材料中的另一个原子。这个过程就是接触起电诱导界面光子发射光谱（CEIIPES）。它自然地为一种与界面处接触起电相对应的光谱学铺平了道路，这可能会影响我们对固体、液体和气体之间相互作用的理解。这里所呈现的物理学原理在一般情况下可扩展到接触起电中的俄歇电子激发、X射线发射和电子发射，这些仍有待探索。这可能会导致一个可被称为接触起电诱导界面光谱学（CEIIS）的通用领域。
