Authors: Suman Mahendia Parveen Kumar Goyal Anil Kumar Tomar Rishi Pal Chahal Shyam Kumar
Publish Date: 2016/06/14
Volume: 45, Issue: 10, Pages: 5418-5426
Abstract
Polyvinyl alcohol PVA embedded with varying concentrations of chemically synthesized copper Cu and gold Au nanoparticles NPs were prepared using ex situ sol–gel casting method The addition of almost the same concentration of CuNPs in PVA improves the conducting properties while that of AuNPs improves the dielectric nature of composite films It has been found that addition of AuNPs up to ∼04 wt concentration enhaneces the capacitive nature due to the formation of small Coulomb tunneling knots as internal capacitors The dielectric studies suggest the Maxwell–Wagner interfacial polarization as the dominant dielectric relaxation process whereas the I–V characteristics indicate bulk limited Poole–Frenkel emission at high voltages as the dominant charge transport mechanism operating at room temperature in all specimens These novel features lead to the conclusion that addition of a small quantity of metal nanoparticles can help tune the properties of PVA for desired applications in biocompatible polymerbased organic electronic devices
Keywords: