Technique: Electrospun Nanocomposites
We are interested in understanding percolation mechanisms in highly porous mats of nanocomposites, formed from polymer doped with carbon nanotubes or metal nanoparticles. These dopants enhance the mechanical and electrical properties of the polymer matrix. Random mats of nanofibers are produced by electrospinning a solution containing the particle and polymer of interest. Due to the high porosity (~80% void) and small thickness (typically < a few microns) of these samples, we make use of interdigitated electrodes for the conductance measurements. Prepared samples are placed in a vacuum system and I-V curves are measured utilizing a femtoammeter to determine electrical conductivity levels as low as 10-13 S/cm.
