Related Experiment Video
Updated: May 6, 2026
05:39
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
10.2K
Polarity-driven nonuniform composition in InGaAs nanowires.
Ya-Nan Guo1, Timothy Burgess, Qiang Gao
1Materials Engineering, The University of Queensland , Brisbane, QLD 4072, Australia.
Nano Letters
|October 19, 2013
Summary
Compositional irregularities in core-shell indium gallium arsenide (InGaAs) nanowires are caused by crystal polarity. This finding offers new ways to control nanowire properties for advanced device applications.
Area of Science:
- Materials Science
- Nanotechnology
- Semiconductor Physics
Background:
- Precise control over semiconductor nanowire composition and morphology is essential for developing advanced nanowire devices.
- Ternary III-V nanowires present unique complexities that hinder controlled fabrication.
Purpose of the Study:
- To investigate the compositional irregularities in the shells of core-shell indium gallium arsenide (InGaAs) nanowires with a zinc-blende structure.
- To understand the underlying mechanisms causing these compositional variations.
Main Methods:
- Analysis of core-shell InGaAs nanowires with zinc-blende structure.
- Investigated the influence of crystal polarity and one-dimensional nanowire geometry.
Main Results:
- Identified compositional irregularity in the shells of InGaAs nanowires.
- Attributed this irregularity to the crystal polarity inherent in the III-V zinc-blende lattice.
- Demonstrated that the one-dimensional nature of nanowires facilitates simultaneous formation of opposite polar surfaces.
Conclusions:
- The observed polarity-driven effect in III-V nanowires provides a novel mechanism for manipulating nanowire composition and morphology.
- This understanding can be leveraged for the design and fabrication of next-generation nanowire-based devices.
Related Concept Videos
01:27Biasing of Metal-Semiconductor Junctions
921
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
921
01:11P-N junction
1.7K
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
1.7K
01:16Biasing of P-N Junction
2.8K
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
2.8K