Monte Carlo study of electron-beam penetration and backscattering in multi-walled carbon nanotube materials: The effect of different scattering models

摘要: A systematic study of electron-beam penetration and backscattering in multi-walled carbon nanotube (MWCNT) materials for beam energies ∼0.3 to 30 keV is presented based on event-by-event Monte Carlo simulation electron trajectories using state-of-the-art scattering cross sections. The importance different analytic approximations computing the elastic inelastic electron-scattering sections MWCNTs emphasized. We offer a simple parameterization total differential elastic-scattering Mott section, appropriate modifications Browning formula Thomas-Fermi screening parameter. discrete-energy-loss approach dielectric theory adopted descriptions section. sensitivity parameters underlying models examined. Our simulations confirm recent experimental data MWCNT forests and, particular, steep increase yield at sub-keV as well sidewalls escape effect high-beam energies.