Publications by authors named "Clayton Petty"
Electrostatic modes of atomic force microscopy have shown to be non-destructive and relatively simple methods for imaging conductors embedded in insulating polymers. Here we use electrostatic force microscopy to image the dispersion of carbon nanotubes in a latex-based conductive composite, which brings forth features not observed in previously studied systems employing linear polymer films. A fixed-potential model of the probe-nanotube electrostatics is presented which in principle gives access to the conductive nanoparticle's depth and radius, and the polymer film dielectric constant.
View Article and Find Full Text PDFInvestigation of Fumed Silica/Aqueous NaCl Superdielectric Material.
Materials (Basel)
February 2016
Article Synopsis
- A study examined a fumed silica material filled with aqueous NaCl solution that exhibited a dielectric constant greater than 10⁸ across various thicknesses (0.38-3.9 mm) and discharge times (0.25 to over 100 seconds).
- The dielectric constant varied with frequency and thickness, remaining consistently above 10⁸ for discharge times longer than 10 seconds, and slightly increasing with thickness.
- For very short discharge times, the dielectric constant decreased, but overall, when discharge times exceed 10 seconds, energy density could reach approximately 350 J/cm³ for a 5 micron thick dielectric layer.