Transmission of electrons through Al2O3 nanocapillaries

We investigate transmission of low-energy electrons (250 eV) through insulating Al2O3 nanocapillaries (270 nm diameter and 15 μm length). Kinetic energy distribution of electrons transmitted through the nanocapillaries in the straightforward direction, time dependence of the transmission rate both in the straightforward direction and for tilted capillaries and angular distributions of electrons transmitted at the incident energy are presented and discussed.