Transmission of Low-energy Electrons through Thin-films of Benzene and Hexane at 80 K

Transmission spectra of low-energy electrons (0–15 eV) for 10–100 Å films of benzene and hexane have been measured at 80 K. Resonances are clearly indicated by electron current It transmitted through the dielectric as a function of the incident electron energy Vi displayed as dIt⁄dVi vs. Vt. When the film thickness of hexane was increased, the height of the first peak (due to injection of electrons in the film) decreased drastically and a second peak appeared and grew strongly. From the energy of the second peak, the bulk electron affinity (–V0) of thin film was estimated. The V0 values for hexane and octane are 0.9 and 1.0 eV, respectively.