Impact of magnetite nanoparticle incorporation on optical and electrical properties of nanocomposite LbL assemblies.
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.
Yashchenok
Alexey M
AM
Faculty of Nano- and Biomedical Technologies, Saratov State University, Saratov 410012, Russia.
Gorin
Dmitry A
DA
Badylevich
Mikhail
M
Serdobintsev
Alexey A
AA
Bedard
Matthieu
M
Fedorenko
Yanina G
YG
Khomutov
Gennady B
GB
Grigoriev
Dmitri O
DO
Möhwald
Helmuth
H