title: Impact of magnetite nanoparticle incorporation on optical and electrical properties of nanocomposite LbL assemblies.
abstract: Optical and electrical properties of polyelectrolyte/iron oxide nanocomposite planar films on silicon substrates were investigated for different amount of iron oxide nanoparticles incorporated in the films. The nanocomposite assemblies prepared by the layer-by-layer assembly technique were characterized by ellipsometry, atomic force microscopy, and secondary ion mass-spectrometry. Absorption spectra of the films reveal a shift of the optical absorption edge to higher energy when the number of deposited layers decreases. Capacitance-voltage and current-voltage measurements were applied to study the electrical properties of metal-oxide-semiconductor structures prepared by thermal evaporation of gold electrodes on nanocomposite films. The capacitance-voltage measurements show that the dielectric constant of the film increases with the number of deposited layers and the fixed charge and the trapped charge densities have a negative sign.
authors.affiliation: Faculty of Nano- and Biomedical Technologies, Saratov State University, Saratov 410012, Russia.
authors.forename: Alexey M
authors.initials: AM
authors.lastname: Yashchenok
authors.forename: Dmitry A
authors.initials: DA
authors.lastname: Gorin
authors.forename: Mikhail
authors.initials: M
authors.lastname: Badylevich
authors.forename: Alexey A
authors.initials: AA
authors.lastname: Serdobintsev
authors.forename: Matthieu
authors.initials: M
authors.lastname: Bedard
authors.forename: Yanina G
authors.initials: YG
authors.lastname: Fedorenko
authors.forename: Gennady B
authors.initials: GB
authors.lastname: Khomutov
authors.forename: Dmitri O
authors.initials: DO
authors.lastname: Grigoriev
authors.forename: Helmuth
authors.initials: H
authors.lastname: Möhwald