Ge quantum dot lattices in Al2O3 multilayers

In this article, we show how to produce materials consisting of regularly ordered Ge quantum dot lattices in an amorphous alumina matrix with a controllable Ge quantum dot size, shape, spacing, crystalline structure, and degree of regularity in their ordering. The production of such materials is ach...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2013-03, Vol.15 (3), Article 1485
Main Authors: Buljan, M., Radić, N., Ivanda, M., Bogdanović-Radović, I., Karlušić, M., Grenzer, J., Prucnal, S., Dražić, G., Pletikapić, G., Svetličić, V., Jerčinović, M., Bernstorff, S., Holý, V.
Format: Article
Language:English
Subjects:
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Electronics
Exact sciences and technology
Inorganic Chemistry
Lasers
Materials Science
Molecular electronics, nanoelectronics
Nanocrystalline materials
Nanoscale materials and structures: fabrication and characterization
Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
Nanotechnology
Optical Devices
Optics
Photonics
Physical Chemistry
Physics
Quantum dots
Research Paper
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Structure of solids and liquids
crystallography
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Summary:In this article, we show how to produce materials consisting of regularly ordered Ge quantum dot lattices in an amorphous alumina matrix with a controllable Ge quantum dot size, shape, spacing, crystalline structure, and degree of regularity in their ordering. The production of such materials is achievable already at room temperature by magnetron sputtering deposition of a (Ge + Al 2 O 3 )/Al 2 O 3 multilayer. The materials show photoluminescence in the visible and ultraviolet light range, a size-dependent blue shift of the photoluminescence peak and an enhancement of its intensity by size reduction, indicating the quantum dot origin of the photoluminescence. The materials also exhibit excellent mechanical properties due to the alumina matrix. Their internal structure is shown to be highly resistive to irradiation with energetic particles for a large range of the irradiation parameters.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-013-1485-9