Events at Physics
I will present several experiments aimed at revealing quantum effects via transport measurements through several types of NCs. First, I will show that colloidal CdSe and CdS nanorods can be used as single electron charge sensors due to induced current switching. Second, I will demonstrate that surface recombination has a profound, size-dependent, effect on the photo-transport through Si-NCs ensembles. Finally, I will present a systematic scanning tunneling spectroscopy study of size and surface-chemistry effects on the electronic level structure of Si-NCs. The tunneling spectra clearly exhibit the quantum confinement effect even in (surface-ligand dependent) cases where these are not manifested in the optical spectra. In addition, the spectra show a p-type surface doping effect in nitrogen terminated Si-NCs.