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3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix

Recently demonstrated 3D networks of Ge quantum wires in an alumina matrix, produced by a simple magnetron sputtering deposition enables the realization of nanodevices with tailored conductivity and opto-electrical properties. Their growth and ordering mechanisms as well as possibilities in the desi...

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Autores principales: Basioli, Lovro, Tkalčević, Marija, Bogdanović-Radović, Iva, Dražić, Goran, Nadazdy, Peter, Siffalovic, Peter, Salamon, Krešimir, Mičetić, Maja
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407503/
https://www.ncbi.nlm.nih.gov/pubmed/32668659
http://dx.doi.org/10.3390/nano10071363
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author Basioli, Lovro
Tkalčević, Marija
Bogdanović-Radović, Iva
Dražić, Goran
Nadazdy, Peter
Siffalovic, Peter
Salamon, Krešimir
Mičetić, Maja
author_facet Basioli, Lovro
Tkalčević, Marija
Bogdanović-Radović, Iva
Dražić, Goran
Nadazdy, Peter
Siffalovic, Peter
Salamon, Krešimir
Mičetić, Maja
author_sort Basioli, Lovro
collection PubMed
description Recently demonstrated 3D networks of Ge quantum wires in an alumina matrix, produced by a simple magnetron sputtering deposition enables the realization of nanodevices with tailored conductivity and opto-electrical properties. Their growth and ordering mechanisms as well as possibilities in the design of their structure have not been explored yet. Here, we investigate a broad range of deposition conditions leading to the formation of such quantum wire networks. The resulting structures show an extraordinary tenability of the networks’ geometrical properties. These properties are easily controllable by deposition temperature and Ge concentration. The network’s geometry is shown to retain the same basic structure, adjusting its parameters according to Ge concentration in the material. In addition, the networks’ growth and ordering mechanisms are explained. Furthermore, optical measurements demonstrate that the presented networks show strong confinement effects controllable by their geometrical parameters. Interestingly, energy shift is the largest for the longest quantum wires, and quantum wire length is the main parameter for control of confinement. Presented results demonstrate a method to produce unique materials with designable properties by a simple self-assembled growth method and reveal a self-assembling growth mechanism of novel 3D ordered Ge nanostructures with highly designable optical properties.
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spelling pubmed-74075032020-08-25 3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix Basioli, Lovro Tkalčević, Marija Bogdanović-Radović, Iva Dražić, Goran Nadazdy, Peter Siffalovic, Peter Salamon, Krešimir Mičetić, Maja Nanomaterials (Basel) Article Recently demonstrated 3D networks of Ge quantum wires in an alumina matrix, produced by a simple magnetron sputtering deposition enables the realization of nanodevices with tailored conductivity and opto-electrical properties. Their growth and ordering mechanisms as well as possibilities in the design of their structure have not been explored yet. Here, we investigate a broad range of deposition conditions leading to the formation of such quantum wire networks. The resulting structures show an extraordinary tenability of the networks’ geometrical properties. These properties are easily controllable by deposition temperature and Ge concentration. The network’s geometry is shown to retain the same basic structure, adjusting its parameters according to Ge concentration in the material. In addition, the networks’ growth and ordering mechanisms are explained. Furthermore, optical measurements demonstrate that the presented networks show strong confinement effects controllable by their geometrical parameters. Interestingly, energy shift is the largest for the longest quantum wires, and quantum wire length is the main parameter for control of confinement. Presented results demonstrate a method to produce unique materials with designable properties by a simple self-assembled growth method and reveal a self-assembling growth mechanism of novel 3D ordered Ge nanostructures with highly designable optical properties. MDPI 2020-07-13 /pmc/articles/PMC7407503/ /pubmed/32668659 http://dx.doi.org/10.3390/nano10071363 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Basioli, Lovro
Tkalčević, Marija
Bogdanović-Radović, Iva
Dražić, Goran
Nadazdy, Peter
Siffalovic, Peter
Salamon, Krešimir
Mičetić, Maja
3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix
title 3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix
title_full 3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix
title_fullStr 3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix
title_full_unstemmed 3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix
title_short 3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix
title_sort 3d networks of ge quantum wires in amorphous alumina matrix
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407503/
https://www.ncbi.nlm.nih.gov/pubmed/32668659
http://dx.doi.org/10.3390/nano10071363
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