Surface contact charging.
Surface contact charging.
复制标题
表面接触充电。
作者：
T. Shinbrot;Matthew Rutala;H. Herrmann
多个实验室的实验表明，重复接触的相同材料会产生无法解释且不断增长的表面电荷域。在这里，我们表明，这些实验中的电荷增长可以符合先前开发的基于随机表面极化反馈的接触充电第一原理模型。令人惊讶的是，这种导致碰撞颗粒床指数增长的机制也可以解释表面电荷的非指数增长，以及预测电荷域的时空增长及其对材料参数的依赖性。
Experiments in several laboratories have demonstrated that identical materials brought into repeated contact generate unexplained and growing surface charge domains. Here we show that the growth of charge from these experiments can be fitted to a previously developed first-principles model for contact charging based on feedback of random surface polarizations. Surprisingly this mechanism, which leads to exponential growth in colliding granular beds, can also explain nonexponential growth of surface charging, as well as predicting spatiotemporal growth of charge domains and their dependencies on material parameters.