论文标题
单碰撞统计数据揭示了由样本病史驱动的全球机制，用于粒状介质的接触电气化
Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media
论文作者
论文摘要
颗粒介质中同一物质接触电气化的模型通常依赖于局部电荷驾驶参数，该参数的空间变化导致了随机起源以进行电荷交换。在与同一材料的底物接触后，测量了从单个颗粒球体的电荷转移，我们发现电荷驱动参数是全局的，而不是局部的。清洁和烘焙样品完全重置其充电行为，这表明基本的全球参数不是材料的固有，而是从其历史中获得的。充电行为会受到相对湿度变化的随机和不可逆转的影响，指出了一种机制，在该机制中，吸附物，特别是水是电荷转移过程的基础。
Models for same-material contact electrification in granular media often rely on a local charge-driving parameter whose spatial variations lead to a stochastic origin for charge exchange. Measuring the charge transfer from individual granular spheres after contacts with substrates of the same material, we find that the charge-driving parameter is global, not local. Cleaning and baking samples fully resets their charging behavior, which indicates the underlying global parameter is not intrinsic to the material, but acquired from its history. Charging behavior is randomly and irreversibly affected by changes in relative humidity, pointing to a mechanism where adsorbates, in particular water, are fundamental to the charge-transfer process.
