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3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix

Basioli, Lovro; Tkalčević, Marija; Bogdanović Radović, Ivančica; Dražič, Goran; Nadaždy, Peter; Siffalović, Peter; Salamon, Krešimir; Mičetić, Maja (2020) 3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix. Nanomaterials, 10 . ISSN 2079-4991

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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.

Item Type: Article
Additional Information: This research was funded by the Croatian Science Foundation (No. IP-2018-01-3633) and the Center of Excellence for Advanced Materials and Sensing Devices (Grant KK. This work was supported by the Slovak Research and Development Agency project SK-CN-RD-18-0006.
Uncontrolled Keywords: Ge quantum wires ; 3D ordering ; self-assembly ; quantum wire network ; quantum confinement
Subjects: NATURAL SCIENCES > Physics
NATURAL SCIENCES > Physics > Condensed Matter Physics
Divisions: Division of Experimental Physics
Division of Materials Physics
Project titleProject leaderProject codeProject type
3D mreže kompleksnih Ge-baziranih nanostruktura u staklima: svojstva i primjene-NetNanoMaja MičetićIP-2018-01-3633HRZZ
Depositing User: Lovro Basioli
Date Deposited: 03 Sep 2020 08:12
DOI: 10.3390/nano10071363

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