Electron transport through molecularly linked nanoparticle films in an external magnetic field

In this thesis, we report the preparation and characterization of niobium carbide (NbC) nanoparticles suitable for study of electronic transport through molecularly linked superconducting nanoparticle films in magnetic fields. Transmission electron microscopy (TEM) and magnetic susceptibility are used to determine the size distribution and superconducting critical temperature (Tc), respectively.; We also report on design and construction/assembly of apparatus required to perform the electrical measurements. To test the apparatus and to explore properties of nanoparticle films comprised of normal metal particles, we have performed an initial study of the temperature and magnetic field dependence of electronic transport through disordered arrays of molecularly linked gold (Au) nanoparticle films. In particular, we have measured the differential conductance and Hall Potential as functions of bias voltage, temperature (to l.8 K) and magnetic field (to 14 T). Magnetic field dependent Coulomb Blockade is observed at low T. We also observe oscillations in the Hall Potential and features in the differential conductance as a function of magnetic field. Work is ongoing to confirm and model these effects.