Local Charge Injection and Extraction on Surface-Modified Al2O3 Nanoparticles in LDPE
journal contributionposted on 17.08.2016, 00:00 by Riccardo Borgani, Love K. H. Pallon, Mikael S. Hedenqvist, Ulf W. Gedde, David B. Haviland
We use a recently developed scanning probe technique to image with high spatial resolution the injection and extraction of charge around individual surface-modified aluminum oxide nanoparticles embedded in a low-density polyethylene (LDPE) matrix. We find that the experimental results are consistent with a simple band structure model where localized electronic states are available in the band gap (trap states) in the vicinity of the nanoparticles. This work offers experimental support to a previously proposed mechanism for enhanced insulating properties of nanocomposite LDPE and provides a powerful experimental tool to further investigate such properties.