Related Experiment Video
Updated: Apr 21, 2026
06:50
Synthesis of Hierarchical ZnO/CdSSe Heterostructure Nanotrees
Published on: November 29, 2016
9.3K
Selective synthesis of compound semiconductor/oxide composite nanowires
Hideaki Hibi1, Masahito Yamaguchi, Naoki Yamamoto
1Graduate School of Engineering, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
Nano Letters
|October 28, 2014
Summary
Semiconductor/oxide composite nanowires were created using molecular beam epitaxy and oxidation. These novel materials exhibit broad cathodoluminescence and hold potential for future optical and electrical applications.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Physics
Background:
- Semiconductor nanowires (NWs) are crucial for advanced electronic and photonic devices.
- Core-shell nanostructures offer enhanced functionality and tunable properties.
Purpose of the Study:
- To synthesize semiconductor/oxide composite nanowires.
- To investigate the structural and optical properties of oxidized GaAs/AlGaAs core-shell NWs.
- To explore their potential for future applications.
Main Methods:
- Molecular beam epitaxy for core-shell NW growth on silicon substrates.
- Controlled wet oxidation to form oxide shells.
- Cathodoluminescence spectroscopy for optical analysis.
Main Results:
- Successfully synthesized GaOx/AlGaOx and GaAs/AlGaOx composite NWs under different oxidation conditions.
- Observed broad cathodoluminescence from the amorphous AlGaOx shell, spanning UV and visible wavelengths.
- Demonstrated core burial within the oxide shell, leading to planar structures with increased oxide diameter.
Conclusions:
- The synthesized semiconductor/oxide composite NWs exhibit unique optical properties.
- The tunable nature of the oxide shell and core-structure interaction is promising.
- These composites represent a significant step towards novel NW-based optoelectronic devices.
