Contact Charge Transfer between Nominally Identical Materials,Annalen Der Physik

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Contact Charge Transfer between Nominally Identical Materials
Annalen Der Physik ( IF 2.2 ) Pub Date : 2021-01-20 , DOI: 10.1002/andp.202000571
John C. Angus ₁ , Isaac Greber ₂

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Differences in concentrations of excited electrons arising from geometry‐dependent differences in de‐excitation paths lead to differences in Fermi energies, which enable contact charge transfer between otherwise identical solids of different size. This model is used with a quasi‐equilibrium description of the Fermi energy to estimate a lower bound of the magnitude of charging of pairs of like particles and the charge distribution in groups of interacting like particles. The predictions agree with observed charge transfer directions between large and small particles and with the broad particle size range over which charging is observed. Estimates of charging are compared to available measurements, the breakdown limits of air, and the relative strengths of interparticle electrostatic and gravitational forces. The influence of particle size distribution on the charge distribution in groups of particles is examined.

中文翻译：

名义上相同材料之间的接触电荷转移

消磁路径中取决于几何形状的差异引起的激发电子浓度的差异会导致费米能量的差异，从而使接触电荷在其他尺寸相同的固体之间转移。该模型与费米能量的准平衡描述一起使用，以估算相似粒子对的电荷大小以及相互作用的相似粒子组中的电荷分布的下限。这些预测与观察到的大颗粒和小颗粒之间的电荷转移方向以及观察到电荷的宽粒度范围一致。将充电估算值与可用的测量结果，空气的破坏极限以及粒子间静电和重力的相对强度进行比较。

更新日期：2021-03-11

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