Issue 35, 2010
From the journal:

Physical Chemistry Chemical Physics

Impact of magnetite nanoparticle incorporation on optical and electrical properties of nanocomposite LbL assemblies

Alexey M. Yashchenok,a   Dmitry A. Gorin,*ab   Mikhail Badylevich,c   Alexey A. Serdobintsev,a   Matthieu Bedard,d   Yanina G. Fedorenko,e   Gennady B. Khomutov,fg   Dmitri O. Grigorievb  and  Helmuth Möhwaldb  

* Corresponding authors

a Faculty of Nano- and Biomedical Technologies, Saratov State University, Saratov 410012, Russia
E-mail: gorin@mpikg.mpg.de, gorinda@mail.ru
Tel: +493315679235

b Interfaces Department, Max-Planck Institute of Colloids and Interfaces, Golm/Potsdam, Germany

c Department of Physics, Catholic University of Leuven and INPAC – Institute for Nanoscale Physics and Chemistry, Celestijnenlaan 200D, B-3001 Leuven, Belgium

d Department of Materials, Queen Mary University of London, London, UK

e Photovoltech NV, Industrial area West Grijpen, Grijpenlaan 18, 3300 Tienen, Belgium

f Faculty of Physics, M.V. Lomonosov Moscow State University, Moscow 119992, Russia

g Institute of Nanotechnologies for Microelectronics RAS, Moscow 119992, Russia

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.

Graphical abstract: Impact of magnetite nanoparticle incorporation on optical and electrical properties of nanocomposite LbL assemblies

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Article information

DOI
https://doi.org/10.1039/C004242K
Article type
Paper
Submitted
15 Mar 2010
Accepted
10 Jun 2010
First published
05 Jul 2010

Phys. Chem. Chem. Phys., 2010,12, 10469-10475

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Impact of magnetite nanoparticle incorporation on optical and electrical properties of nanocomposite LbL assemblies

A. M. Yashchenok, D. A. Gorin, M. Badylevich, A. A. Serdobintsev, M. Bedard, Y. G. Fedorenko, G. B. Khomutov, D. O. Grigoriev and H. Möhwald, Phys. Chem. Chem. Phys., 2010, 12, 10469 DOI: 10.1039/C004242K

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