3D Networks of Ge Quantum Wires in Amorphous Alumina Matrix

Nanomaterials
Lovro BasioliMaja Mičetić

Abstract

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 designab...Continue Reading

References

Oct 26, 2011·Recent Patents on Nanotechnology·Li Z Pei, Zheng Y Cai
Dec 22, 2011·Acta Crystallographica. Section A, Foundations of Crystallography·Maja BuljanVáclav Holý
Mar 19, 2013·Nanoscale Research Letters·Salvatore CosentinoSalvatore Mirabella
Sep 4, 2015·The Review of Scientific Instruments·Zdravko SiketićIva Bogdanović Radović
Nov 9, 2016·Reports on Progress in Physics·Wei ZhouCharles M Lieber
Nov 18, 2018·Scientific Reports·Prabal Dev BhuyanSanjeev K Gupta

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Methods Mentioned

BETA
X-ray
x-ray scattering
transmission electron microscopy

Software Mentioned

SpectraSuite
Matlab
GISAXS

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