title: GaAs Core/SrTiO3 Shell Nanowires Grown by Molecular Beam Epitaxy.
abstract: We have studied the growth of a SrTiO3 shell on self-catalyzed GaAs nanowires grown by vapor-liquid-solid assisted molecular beam epitaxy on Si(111) substrates. To control the growth of the SrTiO3 shell, the GaAs nanowires were protected using an arsenic capping/decapping procedure in order to prevent uncontrolled oxidation and/or contamination of the nanowire facets. Reflection high energy electron diffraction, scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy were performed to determine the structural, chemical, and morphological properties of the heterostructured nanowires. Using adapted oxide growth conditions, it is shown that most of the perovskite structure SrTiO3 shell appears to be oriented with respect to the GaAs lattice. These results are promising for achieving one-dimensional epitaxial semiconductor core/functional oxide shell nanostructures.
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: X
authors.initials: X
authors.lastname: Guan
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Becdelievre
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: B
authors.initials: B
authors.lastname: Meunier
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Benali
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: G
authors.initials: G
authors.lastname: Saint-Girons
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: R
authors.initials: R
authors.lastname: Bachelet
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: P
authors.initials: P
authors.lastname: Regreny
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Botella
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: G
authors.initials: G
authors.lastname: Grenet
authors.affiliation: Institut Lumière Matière (ILM), UMR5306 Université Lyon 1-CNRS Université de Lyon , 69622 Villeurbanne Cedex, France.
authors.forename: N P
authors.initials: NP
authors.lastname: Blanchard
authors.affiliation: Centre Technologique des Microstructures, Université Claude Bernard Lyon 1 , 5 rue Raphael Dubois-Bâtiment Darwin B, F-69622, Villeurbanne Cedex, France.
authors.forename: X
authors.initials: X
authors.lastname: Jaurand
authors.affiliation: Synchrotron SOLEIL (TEMPO Beamline), l'Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette, France.
authors.forename: M G
authors.initials: MG
authors.lastname: Silly
authors.affiliation: Synchrotron SOLEIL (TEMPO Beamline), l'Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette, France.
authors.forename: F
authors.initials: F
authors.lastname: Sirotti
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, INSA-Lyon , 7 avenue Jean Capelle, 69621 Villeurbanne, France.
authors.forename: N
authors.initials: N
authors.lastname: Chauvin
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: M
authors.initials: M
authors.lastname: Gendry
authors.affiliation: Institut des Nanotechnologies de Lyon, Université de Lyon, UMR 5270-CNRS, Ecole Centrale de Lyon , 36 avenue Guy de Collongue, F-69134 Ecully Cedex, France.
authors.forename: J
authors.initials: J
authors.lastname: Penuelas
keywords: Core/shell nanowires; functional oxides; hybrid nanowires; interface; semiconductor