Introduction of a New Technique to Measure the Coefficient of Restitution for Nanoparticles

Abstract

Abstract A modified single‐stage low pressure impactor is described to measure the coefficient of normal restitution e n for nanoparticles. The device is analysed numerically using CFD, and the gas flow inside the structured impaction plate is studied. A formula for the calculation of e n is derived and first measurements of e n for spherical silver particles are presented together with numerical data obtained from force‐based molecular dynamics simulations. Furthermore, the simulation data for e n and the sticking probability are investigated in detail for the elastic, and partly for the plastic impaction regime.