A stroke of X-ray

Charge transfer dynamics in contact electrification of dielectrics investigated by triboluminescence

“…As a type of contact electrification, triboelectrification (also known as triboelectric charging) [1,21,22], which denotes the charge transfer between two surfaces in the frictional contacts, can provide a feasible method for investigating the dynamics of charge transfer in the electrification. In this paper, we focus our attention on the light emission (i.e., triboluminescence) [31][32][33][34][35][36] in the slide contacts, which arises from the dielectric breakdown of the surrounding gas in the contact gap and therefore can be used as an indicator for the charge transfer process in the contact electrification. To reveal the charging characteristics, the effects of the sliding speed on the light intensity in the sliding friction were investigated.…”