Measurement of the electrical properties of ultrathin polymer layers

An experimental procedure is described which makes it possible to measure the electrical properties of ultrathin (less than 0.1 micron) polymer films. This procedure is then used to show that ultrathin layers of polypropelene can exhibit superconducting properties not only at high pressures but also at pressures well below the yield point. Thus a resistivity of 0.01 ohm m, which is 16 orders of magnitude less than the resistivity of bulk polypropelene, has been measured at 4.5 MPa for 90-nm-thick specimens.