| Affiliation: | 1. Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Bioresponsive Materials, Dortmund, Germany Technische Universität Berlin, Institut für Festkörperphysik, Berlin, Germany;2. Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Bioresponsive Materials, Dortmund, Germany;3. Centre of Physics of Minho and Porto Universities (CF-UM-PT), University of Minho, Guimarães, Portugal |
| Abstract: | This work presents the effect of driven nickel nanoparticles (NiNPs) towards the surface of (PS-PANI)/NiNPs nanocomposite upon the application of a uniform magnetic field. The purpose is to obtain distinguishable optoelectronic and electrical properties. This process increases the surface roughness and its reactivity, and enables the tuning of the optical and electrical properties. Based on the results from X-ray photoelectron and Fourier-transform infrared spectroscopies, the magnetically-driven NiNPs to the surface are oxidized, forming NiONPs and NiOHNPs. This oxidation effect transforms the surface from a hydrophilic to a hydrophobic state. In addition, the optical bandgap energy decreases from 4.04 to 3.77 eV, and the electrical conductivity increases from 12.77 μS/cm to 57.80 μS/cm and 77.52 μS/cm, for 50 and 100 mT magnetic fields, respectively, which is attributed to the well-dispersed magnetic nanoparticles in the PS-PANI polymer matrix, resulting in a high homogeneous nanocomposite film. |
