What is the barrier for tunneling through alkyl monolayers? Results from n- and p-Si-Alkyl/Hg junctions

By combining experimental electron-transport results through an alkane monolayer sandwiched between Si and a metal, photoemission data from the monolayer-on-Si, and theoretical calculations, we show that transport is dominated by a distribution of mixed Si molecular levels, rather than a single molecular level, as shown schematically in the figure.